Cumincad : CUMINCAD Papers : Search Results

CumInCAD is a Cumulative Index about publications in Computer Aided Architectural Design
supported by the sibling associations ACADIA, CAADRIA, eCAADe, SIGraDi, ASCAAD and CAAD futures

PDF papers
References

Hits 1 to 20 of 17632

Reformat results as: short short into frame detailed detailed into frame

_id	architectural_intelligence2024_17
id	architectural_intelligence2024_17
authors	Mahnaz Bahremandi-Tolou, Chenhao Wang, Joseph M. Gattas & Dan Luo
year	2024
title	Curved surface form-finding with self-shaping perforated plates
doi	https://doi.org/https://doi.org/10.1007/s44223-024-00059-y
source	Architectural Intelligence Journal
summary	Self-shaping systems offer a promising approach for making complex 3D geometries from the material-driven transformation of 2D sheets. However, current research development of such systems is focused on small-scale applications. This study proposes a self-shaping composite for generation of larger-scale curved surfaces suitable for spatial structures. The composite arises from the novel combination of a perforated plate passive layer and a heat-shrinkable active layer. Experimental investigations are undertaken to assess the influence of perforation parameters of the passive layer over the degree of curvature generated in the self-shaping composite system. A 3D scanner and parametric curvature evaluation tool were used to extract and analyse the fabricated surface curvatures. Three key deformation characteristics were identified: the generated surface is cylindrical with dominant curvature in the x-direction; curvature is approximately uniform across the surface width and length; and curvature is strongly influenced by perforation bridge and strap length parameters. Results of this study support the application of self-shaping curved surfaces for customizable discrete structure parts.
series	Architectural Intelligence
email
last changed	2025/01/09 15:05

_id	5570
authors	Mahnke, Frank H.
year	1996
title	Color, environment, and human response: an interdisciplinary understanding of color and its use as a beneficial element in the design of the architectural environment
source	Van Nostrand Reinhold, New York
summary	Written for architects, interior designers, and color consultants, this ambitious study explores the psychological and physiological effects of color in the man-made environment. Scientific findings and industry-by-industry examples are furnished to help professionals specify colors that will create healthful environments in hospitals, schools, restaurants, and other public facilities.
series	other
last changed	2003/04/23 15:14

_id	8095
authors	Mahrouq, Abdulrahman and Al-Haddad, Baha'uddin
year	2001
title	Gaza City: Virtual space and the control of physical space
source	CORP 2001, Vienna, pp. 397-402
summary	The interaction between virtual space and physical space is increasingly gaining more importance and consideration [1]. Much of theinterest concentrates upon theorizing this interaction and investigating the different concepts behind it [2]. Another concern is toexplore aspects of the physical space through its virtuality especially in the field of architecture and urban design [3]. Yet with theevidence that the increasing pace of development in multimedia, information and communications technology is exerting vastchanges on the physical space, there is a disparate need for control over these very fast changes. Control of the physical space is themain subject of physical planning where it is crucial to develop new tools and procedures for better control of the urban change.Applications of data, information and communications technologies in urban planning and geographic information system (GIS)constitute one of the vital fields for the control and guidance of urban development.In Gaza Strip for example, unprecedented developments resulted after the declaration of the Palestinian- Israeli peace agreements in1994. Information and communications technologies and data sources were improved with the introduction of computers, moderntelephone and wireless communications and satellite imaging. The new developments began to impinge the existing British Mandatesystem and the physical planning process. The municipality of Gaza city took the lead and became the most important and activelocal planning institution to benefit from the new situation. Although the new developments are in their early stage, the positiveimpact on the planning process and the control over the built environment in the city are paramount.This paper aims at exploring the new developments of spatial technologies in the municipality of Gaza and their impact on theplanning conduct and the built environment in the city.
series	other
more	www.corp.at
last changed	2002/09/04 13:19

_id	ga9917
id	ga9917
authors	Maia Jr., A., Valle, R. do, Manzolli, J. and Pereira, L.N.S.
year	1999
title	Generative Polymodal Music Process
source	International Conference on Generative Art
summary	We present underlying ideas used to develop an Algorithmic Composition software named KYKLOS. It was designed to generate music based on generalised musical scales and modes. It is an interactive sonic device to be applied in composition as well in performance. The sonic output of the whole process can be described as generalised polymodal music since “synthetic scales” are generated by the algorithm. This environment can be used in a Computer Assisted Composition manner in order to generate MIDI files. On the other hand, it can equally be used as a performance environment in which a dynamic change of parameters enables a real time control of the sonic process. Recently, we advocated that several mathematical applications in Computer Music can be understood as Sound Functors [1]. In extension, we describe here a sound functor used to model scales and modes. As can be verified, part of early investigations on mathematical structures in music studied musical scales and modes using Combinatorics, Fibonacci Series and Golden Mean in order to understand compositional processes which use modal concepts. Using the Functor definition it is possible to enumerate n-scales as a sequence of integers. Each value in that sequence gives the distance (in half tones) between two consecutive tones. For example, the sequence 3:2:2:3 is interpreted as a pentatonic scale C-Eb-F-G-Bb, and as defined above it is a C mode. So, if we apply cyclical permutations, (n-1)-sequences of numbers should be interpreted as n-modes of tones. Our algorithmic implementation is described briefly. A n-mode is defined as an array with n-1 integers [a1, a2, ...an-1]. Each array generated at k-th step can be read as a number a1a2a3 ....an-1 in decimal representation, where ai is a integer between 1 and 9. We denote the number obtained at k-th step as (a1a2a3 ...an-1)(k) . The rules to implement the algorithm are the following:1) V0 = (1, 1, 1, 1 ......,1) (initial n-mode)2) ? ai ? 11 with i= 1, 2...n-1 (octave range constraint)3) Vk = (a1a2a3 ...an-1)(k) < (b1b2b3 ...bn-1)(k+1) = Vk+1 where aj ?bj , 1? j ? n-1.4) Vmax = (13 – n, 1, 1, ...,1)In this paper we start with a theoretical view and an introduction on the algorithmic mechanism used. Further, we present a concept of man ? machine interaction used to create the composition environment. We also describe the compositional graphic interface developed and general functions of the system. Finally there is a set of music examples generated by KYKLOS as MIDI files.
series	other
more	http://www.generativeart.com/
last changed	2003/08/07 17:25

_id	sigradi2023_366
id	sigradi2023_366
authors	Maia, Marcelo, Silva, Beatriz, Marajó, Marcela and Rena, Natacha
year	2023
title	Belo Horizonte, Zurich and Wuhan: a comparative analysis of transportation systems as a strategy for innovation and intelligence
source	García Amen, F, Goni Fitipaldo, A L and Armagno Gentile, Á (eds.), Accelerated Landscapes - Proceedings of the XXVII International Conference of the Ibero-American Society of Digital Graphics (SIGraDi 2023), Punta del Este, Maldonado, Uruguay, 29 November - 1 December 2023, pp. 807–818
summary	Technological innovations such as 5G connectivity, the Internet of Things (IoT), Artificial Intelligence (AI) and 'Big Data' have fostered the development of Intelligent Transportation System (ITS) projects. It should be noted, however, that intelligence does not lie in the use of technological innovations, but in innovative urban planning practices that are developed in an environment of political intelligence. This finding is the result of a comparative study of urban transportation policies in the face of technological innovations between Belo Horizonte (Brazil), Zurich (Switzerland) and Wuhan (China). It uses 28 indicators divided into 6 Intelligence Areas based on smart cities rankings, empirical studies and related to Sustainable Development Goals (SDGs). The purpose of the analysis is to contribute to the improvement of urban transport services by guiding innovation and intelligence in urban transport policy.
keywords	Virtual environments, Intelligent Transportation System, Digitalization of mobility, Smart cities, Political intelligence.
series	SIGraDi
email
last changed	2024/03/08 14:07

_id	sigradi2018_1587
id	sigradi2018_1587
authors	Maia, Marcelo; Borges, Jéssica; Brito, Michele; de Sá, Ana Isabel
year	2018
title	Internet of Things Technology and Policy in Belo Horizonte Public Transportation System
source	SIGraDi 2018 [Proceedings of the 22nd Conference of the Iberoamerican Society of Digital Graphics - ISSN: 2318-6968] Brazil, São Carlos 7 - 9 November 2018, pp. 568-573
summary	From a critical point of view regarding Smart Cities, this paper presents an overview of Brazilian policies concerning the application of Internet of Things (IoT) on public transportation systems, using as a case study the city of Belo Horizonte. We performed a critical analysis of its public transportation system considering the already installed IoT infrastructure, including mobile communication technology that uses distributed locative media among users. Our main focus was understanding its use, potential and political dimension, specially concerning terms of use and data distribution and sharing between users, public administration and private companies that compose the transportation system.
keywords	urban transportation system; technopolitics; internet of things; smart city; instant city
series	SIGRADI
email
last changed	2021/03/28 19:58

_id	cf2015_239
id	cf2015_239
authors	Maia, Sara Costa and Meyboom, AnnaLisa
year	2015
title	Interrogating interactive and responsive architecture: The quest of a technological solution looking for an architectural problem
source	The next city - New technologies and the future of the built environment [16th International Conference CAAD Futures 2015. Sao Paulo, July 8-10, 2015. Electronic Proceedings/ ISBN 978-85-85783-53-2] Sao Paulo, Brazil, July 8-10, 2015, pp. 239.
summary	Interactive Architecture and Responsive Architecture are provocative fields of investigation and have potentially disruptive and far reaching effects for architecture. However it can be argued that these fields haven’t been developed as a direct response to previously identified architectural demands. Instead, they have risen as consequence of new technology availability, with ad hoc discussions in the context of the built environment. In order to test this hypothesis, 229 publications were examined and narrowed down to 77 papers and 41 design projects, which were systematically analyzed. The primary objective of this investigation is to understand Interactive Architecture’s development with regard to justification. This understanding provides us with the basis to speculate on the possibly expanding introduction of extraneous technological solutions to the discipline of architecture. The research findings indicate a mismatch between theoretical discourse and projects being developed in those fields. They also describe the current state of Interactive Architecture research.
keywords	Interactive Architecture, Responsive Architecture, Literature Analysis, Design Projects Analysis.
series	CAAD Futures
email
last changed	2015/06/29 07:55

_id	acadia16_372
id	acadia16_372
authors	Maia, Sara Costa; Meyboom, AnnaLisa
year	2016
title	Researching Inhabitant Agency in Interactive Architecture
doi	https://doi.org/10.52842/conf.acadia.2016.372
source	ACADIA // 2016: POSTHUMAN FRONTIERS: Data, Designers, and Cognitive Machines [Proceedings of the 36th Annual Conference of the Association for Computer Aided Design in Architecture (ACADIA) ISBN 978-0-692-77095-5] Ann Arbor 27-29 October, 2016, pp. 372-381
summary	The study of Interactive Architecture (IA) spans over several decades and appears to be gaining increasing momentum in recent years. Yet, inhabitant-centered approaches towards research and design in the field still have a long way ahead to explore. Particularly, we observed that the examination of IA’s social relevance in literature is still incipient and ill supported by evidence. The study discussed in this paper is attempting to remediate this gap by exploring one of the first socio-political arguments around the relevance of IA, namely inhabitant empowerment and agency. It investigates whether an inhabitant’s relation and experience with interactive spaces, conceived according to different interaction strategies, increases the participants’ perception of their own agency in the space. In this paper, we briefly explain the prototyping of an interactive space-plan designed to emulate the behavior of four basic models of interaction. Finally, the paper presents an experimental study set to test inhabitant agency in IA. It concludes that IA has the potential to increase inhabitant agency, but that this is very dependable on the system’s design regarding behavior and interaction.
keywords	agency, responsive environments, interactive architecture, sensate systems
series	ACADIA
type	paper
email
last changed	2022/06/07 07:59

_id	cdrf2019_124
id	cdrf2019_124
authors	Maider Llaguno-Munitxa and Elie Bou-Zeid
year	2020
title	Sensing the Environmental Neighborhoods Mobile Urban Sensing Technologies (MUST) for High Spatial Resolution Urban Environmental Mapping
doi	https://doi.org/https://doi.org/10.1007/978-981-33-4400-6_12
source	Proceedings of the 2020 DigitalFUTURES The 2nd International Conference on Computational Design and Robotic Fabrication (CDRF 2020)
summary	Given the benefits of fine mapping of large urban areas affordably, mobile environmental sensing technologies are becoming increasingly popular to complement the traditional stationary weather and air quality sensing stations. However the reliability and accuracy of low-cost mobile urban technologies is often questioned. This paper presents the design of a fast-response, autonomous and affordable Mobile Urban Sensing Technology (MUST) for the acquisition of high spatial resolution environmental data. Only when accurate neighborhood scale environmental data is affordable and accessible for architects, urban planners and policy makers, can design strategies to enhance urban health be effectively implemented. The results of an experimental air quality sensing campaign developed within Princeton University Campus is presented.
series	cdrf
email
last changed	2022/09/29 07:51

_id	ecaade2020_511
id	ecaade2020_511
authors	Maierhofer, Mathias, Ulber, Marie, Mahall, Mona, Serbest, Asli and Menges, Achim
year	2020
title	Designing (for) Change - Towards adaptivity-specific architectural design for situational open Environments
doi	https://doi.org/10.52842/conf.ecaade.2020.2.575
source	Werner, L and Koering, D (eds.), Anthropologic: Architecture and Fabrication in the cognitive age - Proceedings of the 38th eCAADe Conference - Volume 2, TU Berlin, Berlin, Germany, 16-18 September 2020, pp. 575-584
summary	The introduction of cybernetic principles to the architectural discourse some 50 years ago stimulated a new notion of buildings as dynamic and under-specified systems. Although their traditional conception as static and deterministic objects has remained predominant to this day, concepts for adaptive architecture capable of interacting with their surroundings and occupants have gained renewed attention in recent decades. However, investigations so far have largely concentrated on small-scale applications or individual adaptation strategies. The notion of situational open Environments, as argued in this paper, provides a framework through which adaptivity can be conceived and explored more holistically as well as on an inhabitable scale. Environments reject deterministic design and adaptation solutions and hence call for integrative and interactive design strategies that not only allow for the exploration of particularly adaptable (i.e. underspecified) architectural morphologies, but also for the communication and negotiation during their further development beyond deployment. In respect thereof, this paper discusses the potentials and implications of computational (design) strategies, meaning the agencies of buildings, designers, residents, and surroundings. The presented research originates from the author's involvement in an interdisciplinary research project centered around the development of an adaptive high-rise building that incorporates various adaptation strategies.
keywords	Adaptive Architecture; Architectural Environment; Computational Design; Agent-based Modeling; Architecture Theory; Cybernetics
series	eCAADe
email
last changed	2022/06/07 07:59

_id	sigradi2012_274
id	sigradi2012_274
authors	Maing, Minjung
year	2012
title	Virtual Mock-up Simulation of Building Skins for Design to Fabrication Integration
source	SIGraDi 2012 [Proceedings of the 16th Iberoamerican Congress of Digital Graphics] Brasil - Fortaleza 13-16 November 2012, pp. 467-470
summary	With the growing demand for mock-up integration into late design and pre-construction phases, there is an increasing gap between the virtual design model of the building and the construction model. The gap is reinforced by lack of strong iterative exchanges between design and fabrication and consequently the construction of the building skin systems. This paper will discuss the research being conducted using virtual mock-ups as an earlier insertion of fabrication parameters into design process and presents a solution to bridge this gap. Studies of model integration will be introduced using component-based 3D-CAD modeling to link front and end user scenarios.
keywords	virtual mock-up; fabrication; integration; building skin ; simulation
series	SIGRADI
email
last changed	2016/03/10 09:55

_id	sigradi2013_364
id	sigradi2013_364
authors	Maing, Minjung; Rodrigo Vargas
year	2013
title	Digital Fabrication Processes of Mass Customized Building Facades in Global Practice
source	SIGraDi 2013 [Proceedings of the 17th Conference of the Iberoamerican Society of Digital Graphics - ISBN: 978-956-7051-86-1] Chile - Valparaíso 20 - 22 November 2013, pp. 415 - 419
summary	This paper describes the process of digital design and fabrication for customized building facades and effects from highly customized configurations in U.S., major manufacturing power of China, and emerging construction in Asia and South America. Case studies are presented to form comparisons of technology adoption to project workflow in these three global contexts. Although integration of digital fabrication has shown signs of success in U.S., traditional practices of limited digital information exchange are commonplace in Asia and South America. With focus on adoption of new fabrication tools, BIM and larger production capacity, the potential benefits of digital fabrication are imminent.
keywords	Digital fabrication; Building facades; Mass customization; Curtain wall; BIM
series	SIGRADI
email
last changed	2016/03/10 09:55

_id	c714
authors	Majchrzak, Collins, P. and Mandeville, D.
year	1986
title	A Quantitative Assessment of Changes in Work Activities Resulting from Computer-Assisted Design
source	Behaviour and Information Technology 1986 v.5 n.3 p.259-271
summary	In an effort to understand how computer-assisted design (CAD) can be optimized in an organizational setting, perceptions and attitudes of CAD users about their jobs and workplace are compared with those of non-users. Results indicate that the implementation of CAD may not result in the expected benefits if CAD is not appropriately managed. Job unpredictability, job autonomy, and job interdependence are three areas in particular needing management attention if CAD benefits are to be achieved.
series	other
last changed	2002/07/07 16:01

_id	ecaade2021_009
id	ecaade2021_009
authors	Majzoub, Omar and Haeusler, M. Hank
year	2021
title	Investigating Computational Methods and Strategies to Reduce Construction and Demolition Waste in Preliminary Design
doi	https://doi.org/10.52842/conf.ecaade.2021.1.325
source	Stojakovic, V and Tepavcevic, B (eds.), Towards a new, configurable architecture - Proceedings of the 39th eCAADe Conference - Volume 1, University of Novi Sad, Novi Sad, Serbia, 8-10 September 2021, pp. 325-334
summary	The waste produced in construction and demolition presents social, economic, and environmental challenges on a global scale. Research suggests that effective decision-making mechanisms are needed during preliminary design stages to minimise the production of waste. In early research, we presented a beta version of a waste reduction tool which is now in need of a User Experience (UX) and Interaction Experience (IX) strategy to meet our research aims of (a) supporting architects in making informed decisions and (b) offer general as well a specific design optimisation to reduce waste. Thus in our research, we arrived at a point that required an investigation into computational methods and strategies to meet these aims. While optimisation and decision-making in architecture are often achieved through generative design strategies, we aim to investigate and discuss alternatives. Thus we propose the hypothesis of employing augmented intelligence. The paper presents work in augmented intelligence undertaken outside the architecture discipline and presents our literature review with a discussion and conclusion.
keywords	Waste reduction; computational methods and strategies; sustainable development goals; augmented intelligence; position paper
series	eCAADe
email
last changed	2022/06/07 07:59

_id	0787
authors	Mak, Stephen
year	2001
title	A model of information management for construction using information technology
source	Automation in Construction 10 (2) (2001) pp. 257-263
summary	The construction industry is slow in utilising information technology (IT) to manage projects. Application of IT is piecemeal, discrete and non-systematic. Managing information for construction projects is crucial in order to make good and full use of IT in the construction industry. This paper proposes a simplified model to achieve managing information for construction by utilising the ubiquitous Internet technologies. The openness of these technologies is receiving attention of not only academics and amateurs but also of business entities and government organisations. A database-web link is required in order to properly store, organise and archive information. Internet technologies can be adapted to a corporate Intranet or business Extranet. Experiencing the advantages of Internet technologies is crucial in order to avoid negative perceptions.
series	journal paper
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 21:22

_id	sigradi2016_446
id	sigradi2016_446
authors	Makert, Rodrigo; Alves, Gilfranco
year	2016
title	Entendendo o Design Digital: o designer nos processos digitais de projeto [Understanding the Digital Design: the designer in digital design processes]
source	SIGraDi 2016 [Proceedings of the 20th Conference of the Iberoamerican Society of Digital Graphics - ISBN: 978-956-7051-86-1] Argentina, Buenos Aires 9 - 11 November 2016, pp.34-41
summary	This paper presents a specific aspect of a post-graduate research entitled "Between Design and Designer: Considerations on digital design" and investigates the designer in the digital design processes. It is believed that the unique and subjective nature of the designers are key part of the result and the own choice of architectural design method. Currently, digital technology has enabled new design methods, casting a revaluation of theories related to design. Considering the complexity of contemporary designs it is necessary to open the black box of design and show the context in which the design acts or should act.
series	SIGRADI
email
last changed	2021/03/28 19:58

_id	caadria2018_065
id	caadria2018_065
authors	Makki, Mohammed and Showkatbakhsh, Milad
year	2018
title	Control of Morphological Variation Through Population Based Fitness Criteria
doi	https://doi.org/10.52842/conf.caadria.2018.1.153
source	T. Fukuda, W. Huang, P. Janssen, K. Crolla, S. Alhadidi (eds.), Learning, Adapting and Prototyping - Proceedings of the 23rd CAADRIA Conference - Volume 1, Tsinghua University, Beijing, China, 17-19 May 2018, pp. 153-162
summary	A primary challenge for the application of an evolutionary process as a design tool is the ability to maintain variation amongst design solutions while simultaneously increasing in fitness. The 'golden rule' of balancing exploration versus exploitation of solutions within the population becomes more critical when the solution set is required to present a controlled degree of phenotypic variation but ensure that convergence of the solution set continues towards increased levels of fitness. The experiments presented within this paper address the control of variation throughout the simulation by means of incorporating a population-based fitness criterion that is utilised as a fitness objective and is calculated dynamically throughout the algorithmic run in both single and multi objective design problems.
keywords	Architecture; Computation ; Evolution; Urban; Variation
series	CAADRIA
email
last changed	2022/06/07 07:59

_id	ecaade2015_136
id	ecaade2015_136
authors	Makki, Mohammed; Farzaneh, Ali and Navarro, Diego
year	2015
title	The Evolutionary Adaptation of Urban Tissues through Computational Analysis
doi	https://doi.org/10.52842/conf.ecaade.2015.2.563
source	Martens, B, Wurzer, G, Grasl T, Lorenz, WE and Schaffranek, R (eds.), Real Time - Proceedings of the 33rd eCAADe Conference - Volume 2, Vienna University of Technology, Vienna, Austria, 16-18 September 2015, pp. 563-571
summary	The use of evolutionary solvers in design has introduced the potential of dealing with multiple conflicting objectives under a single design model. The experiments presented in this paper employ an evolutionary solver towards the generation of a 4x4 urban superblock in the city of Barcelona, one of the highest population density cities in Europe. The superblock is based on Cerda's iconic 8-sided block and takes three conflicting objectives into account, aiming not only to achieve a high density proposal but one that considers block relations, as well as green space throughout the city. The design is based on principles of evolutionary science, generating a population of solutions, whose individuals are ranked and selected based on a fitness criteria. Rather than aiming to reach a single 'optimal' solution, the model produces a population of solutions that are optimized in relation to the design environment.
wos	WOS:000372316000063
series	eCAADe
email
last changed	2022/06/07 07:59

_id	ijac201917101
id	ijac201917101
authors	Makki, Mohammed; Milad Showkatbakhsh, Aiman Tabony and Michael Weinstock
year	2019
title	Evolutionary algorithms for generating urban morphology: Variations and multiple objectives
source	International Journal of Architectural Computing vol. 17 - no. 1, 5-35
summary	Morphological variation of urban tissues, which evolve through the optimisation of multiple conflicting objectives, benefit significantly from the application of robust metaheuristic search processes that utilise search and optimisation mechanisms for design problems that have no clear single optimal solution, as well as a solution search space that is too large for a ‘brute-force’ manual approach. As such, and within the context of the experiments presented within this article, the rapidly changing environmental, climatic and demographic global conditions necessitates the utilisation of stochastic search processes for generating design solutions that optimise for multiple conflicting objectives by means of controlled and directed morphological variation within the urban fabric.
keywords	Architecture, computation, evolution, biology, urban, variation, morphology, genetic algorithm, computer aided design
series	journal
email
last changed	2019/08/07 14:04

_id	6810
authors	Makkonen, Petri
year	1999
title	On multi body systems simulation in product design
source	KTH Stockholm
summary	The aim of this thesis is to provide a basis for efficient modelling and software use in simulation driven product development. The capabilities of modern commercial computer software for design are analysed experimentally and qualitatively. An integrated simulation model for design of mechanical systems, based on four different "simulation views" is proposed: An integrated CAE (Computer Aided Engineering) model using Solid Geometry (CAD), Finite Element Modelling (FEM), Multi Body Systems Modelling (MBS) and Dynamic System Simulation utilising Block System Modelling tools is presented. A theoretical design process model for simulation driven design based on the theory of product chromosome is introduced. This thesis comprises a summary and six papers. Paper A presents the general framework and a distributed model for simulation based on CAD, FEM, MBS and Block Systems modelling. Paper B outlines a framework to integrate all these models into MBS simulation for performance prediction and optimisation of mechanical systems, using a modular approach. This methodology has been applied to design of industrial robots of parallel robot type. During the development process, from concept design to detail design, models have been refined from kinematic to dynamic and to elastodynamic models, finally including joint backlash. A method for analysing the kinematic Jacobian by using MBS simulation is presented. Motor torque requirements are studied by varying major robot geometry parameters, in dimensionless form for generality. The robot TCP (Tool Center Point) path in time space, predicted from elastodynamic model simulations, has been transformed to the frequency space by Fourier analysis. By comparison of this result with linear (modal) eigen frequency analysis from the elastodynamic MBS model, internal model validation is obtained. Paper C presents a study of joint backlash. An impact model for joint clearance, utilised in paper B, has been developed and compared to a simplified spring-damper model. The impact model was found to predict contact loss over a wider range of rotational speed than the spring-damper model. Increased joint bearing stiffness was found to widen the speed region of chaotic behaviour, due to loss of contact, while increased damping will reduce the chaotic range. The impact model was found to have stable under- and overcritical speed ranges, around the loss of contact region. The undercritical limit depends on the gravitational load on the clearance joint. Papers D and E give examples of the distributed simulation model approach proposed in paper A. Paper D presents simulation and optimisation of linear servo drives for a 3-axis gantry robot, using block systems modelling. The specified kinematic behaviour is simulated with multi body modelling, while drive systems and control system are modelled using a block system model for each drive. The block system model has been used for optimisation of the transmission and motor selection. Paper E presents an approach for re-using CAD geometry for multi body modelling of a rock drilling rig boom. Paper F presents synthesis methods for mechanical systems. Joint and part number synthesis is performed using the Grübler and Euler equations. The synthesis is continued by applying the theory of generative grammar, from which the grammatical rules of planar mechanisms have been formulated. An example of topological synthesis of mechanisms utilising this grammar is presented. Finally, dimensional synthesis of the mechanism is carried out by utilising non-linear programming with addition of a penalty function to avoid singularities.
keywords	Simulation; Optimisation; Control Systems; Computer Aided Engineering; Multi Body Systems; Finite Element Method; Backslash; Clearance; Industrial Robots; Parallel Robots
series	thesis:PhD
last changed	2003/02/12 22:37

For more results click below: