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Relative Localizability and Localization for Multirobot systems

IEEE Transactions on robotics 2025年 41卷 2931-2949页

作者： Chen, Liangming Liang, Chenyang Yuan, Shenghai Cao, Muqing Xie, Lihua Southern University of Science and Technology School of System Design and Intelligent Manufacturing Guangdong Provincial Key Laboratory of Fully Actuated System Control Theory and Technology Shenzhen518055 China Harbin Institute of Technology School of Mechanical Engineering and Automation Shenzhen518055 China Southern University of Science and Technology School of System Design and Intelligent Manufacturing Shenzhen518055 China Nanyang Technological University School of Electrical and Electronic Engineering 639798 Singapore Carnegie Mellon University Robotics Institute PittsburghPA15213 United States

Inter-robot relative positions are crucial for executing various multirobot missions, such as formation maneuvering and collaborative inspection. However, the current sensing technology usually provides part of relative position information, such as inter-robot distances, bearings and angles. This prompts the study of determining inter-robot relative positions, i.e., relative localization, from these partial measurements. Based on the existing results of static networks' localizability and mobile robots' relative localization, we propose a novel concept, relative localizability to describe whether a multirobot system is relatively localizable. Given each robot's self-displacement measurements and inter-robot partial measurements in d (d ≤ 4) sampling instants, we show that a multirobot system's relative localization can be achieved in a purely algebraic and distributed manner, in which the multirobot system is said to be d-step relatively localizable. To make the results more general, we consider that the multirobot system consists of landmarks, leaders, and followers, and that the inter-robot measurements can be distances, bearings or angles. When robots' coordinate frames have different orientations, we show that the given local measurements can be used to determine robots' relative positions and their coordinate frames' relative orientations simultaneously. Simulations and experiments of relative localization for ground robots are conducted to validate the obtained results. © 2004-2012 IEEE.

关键词： Multipurpose robots

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The ANDECS Framework for Computational system dynamics Integration

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IFAC Proceedings Volumes 1995年第23期28卷 89-94页

作者： G. Grübel J. Bals R. Finsterwalder H.-D. Joos M. Otter DLR-Oberpfaffenhofen Control Design Engineering Institute for Robotics & System Dynamics D-82230 Wessling Germany

Integrated systems engineering is essential in design-concept validation. In particular, computer-aided procedures for system dynamics integration beyond mere functional integration are necessary in order to neither underestimate nor to overestimate design-safety margins. At hand of the open system-dynamics integration environment ANDECS (ANalysis & design of controlled systems), we deal with concepts and realized features of a framework for computational experimenting in system-dynamics design and evaluation. This paper is the lead paper to four companion papers which together form a case study on applied multidisciplinary dynamics design experimenting.

关键词： Computer-Aided Compromising system dynamics engineering Software Framework

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ANDECS-Multicriteria Optimization of a Fuzzy-Logic controller for an Aerodynamically Unstable Aircraft in Comparison to a Linear Robust control design

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IFAC Proceedings Volumes 1995年第23期28卷 107-112页

作者： H.-D. Joos DLR-Oberpfaffenhofen Control Design Engineering Institute for Robotics & System Dynamics D-82230 Wessling Germany

The performance benefits of an aerodynamically unstable aircraft are obtained at the expense of the necessity of an automatic control system. For reliability requirements controllers without gain scheduling are looked for. To achieve this a complex ”robust control” design problem has to be solved. Fuzzy-controllers are claimed to have robustness properties. On the other hand the fuzzy-control methodology can be seen as a systematic way to specify controllers with nonlinear gain surfaces. To properly tune such controllers, computer-aided techniques can be applied provided appropriate models are available such as in more classical design approaches. A fuzzy-controller is developed, which keeps an aerodynamically unstable aircraft stationary for a sufficient long range of time and providing good flying qualities over the entire flight envelope. The results are compared with a completely linear controller design, done earlier.

关键词： Fuzzy-Logic controller Optimization Multi-Objective design

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ANDECS Robot-Trajectory Optimization for State-Constrained Time-Optimal control and Minimum Power Consumption

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IFAC Proceedings Volumes 1995年第23期28卷 101-106页

作者： A. Lewald M. Otter G. Grübel DLR-Oberpfaflenhofen Control Design Engineering Institute for Robotics & System Dynamics D-82230 Wessling Germany

The robot trajectory optimization features of the ANDECS environment are described. Robot trajectory optimization problems are formulated as multi-objectives parameter optimization problems in search for a good compromise among conflicting criteria, such as “minimal” time and “minimal” power consumption. For that the robot dynamics is analyzed by time-simulation of a robot model with variable structure, which is generated by the object-oriented modeling language Dymola.

关键词： Computer simulation Industrial Robots Nonlinear Programming Optimization Robots Trajectory planning

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CACSD-Frame for Robust Low-Complexity control Law design

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IFAC Proceedings Volumes 1997年第4期30卷 1-14页

作者： Georg Grübel DLR Institute of Robotics and System Dynamics Control Design Engineering Group Oberpfaffenhofen D-82234 Wessling Germany

Robust low-complexity control laws design is the ultimate goal which Computer-Aided control system design (CACSD) aims for. We recognize seven classes of services CACSD tools and environments have to support w.r.t. this view: physical system modelling with modelling uncertainty descriptions; mathematical system modelling with suited uncertainty models; system model analysis in state space, time- and frequency domain; control law synthesis; multiobjective (multicriteria and multimodel) synthesis-parameter tuning; nonlinear assessment via simulation; control code generation. We deal with state of the art aspects of such services and their integration within an interactively controlled automatic design feedback loop. This is illustrated by experience gained during the two-years GARTEUR a design challenge project on Robust Aircraft Flight control, where 12 teams from 6 European countries demonstrated 11 different CACSD synthesis methods to design a landing-approach autopilot controller based on a Beluga-type aircraft model from Airbus Industries.

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ANDECS Computational Experimenting with the IAVSD Car-Suspension Benchmark ILTIS

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IFAC Proceedings Volumes 1995年第23期28卷 95-99页

作者： W. Schwartz H.-D. Joos DLR-Oberpfaffenhofen Vehicle Systems Dynamics Institute for Robotics & System Dynamics D-82230 Wessling Germany DLR-Oberpfaffenhofen Control Design Engineering Institute for Robotics & System Dynamics D-82230 Wessling Germany

Nonlinear vehicle system dynamics plays an important role in the development and the assessment of active suspension control systems. The current way of designing active suspension control systems mostly uses simplified models, in order to to apply analytical synthesis methods or to achieve low complexity of the controller when using such methods. However, advanced vehicle design require methodologies, that can deal with more complex vehicle models, as a step towards integrated design. Multi-objective control design is such a methodology, that is open to cope with any controller structure and arbitrary kind of models. In this case study the usefulness of this methodology is investigated by designing an actively controlled vehicle suspension with and without preview for the IAVSD benchmark model ILTIS. The full nonlinear model is used for design. The ’nonlinear’ results are compared to the results of a ’linear’ design, based on linearized vehicle models.

关键词： Computer-Aided Multi-Objective design Vehicle system dynamics Automotive Car-Suspensions

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A-Student's View: On the Usefulness of a Professional Software Environment for Computer-Aided control Education

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IFAC Proceedings Volumes 1994年第9期27卷 265-268页

作者： G. Grübel DLR Oberpfaffenhofen Control-Design Engineering Group Institute for Robotics and System Dynamics D-82234 Wessling Germany

For computer-aided control engineering education a scalable software technology is proposed, which is both useful for professional work in control engineering theory and practice and for novice training. The idea is to provide a common environment for computational experimenting in all stages of control engineering. This proposal is based on ANDECS (ANalysis & design of controlled systems), a modular interactive control- and system dynamics analysis and design system developed at the German Aerospace Research Establishment DLR.

关键词： control Education Computer-Aided control engineering (CACE, CACSD)

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The ANDECS-Matlab environment for databased computational control experimenting

The ANDECS-Matlab environment for databased computational co...

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IEEE International Symposium on Computer Aided control system design (CACSD)

作者： J. Bals H.-D. Joos G. Grubel Control Design Engineering Institute for Robotics and System Dynamics DLR-Oberpfaffenhofen Wessling Germany

The ANDECS-Matlab environment provides two alternatives for databased computational experimenting using Matlab: The module Amatlab is a re-implementation of the classic matlab syntax to be used for interactive specification of matrix calculations in modular computation sequences. This syntax is extended to allow database access for data communication with other databased modules. Alternatively, the module PROMAT allows one to use commercial MATLAB via process communication with online data transfer between the ANDECS database and the MATLAB workspace in both directions. This allows a convenient use of the matlab syntax and a coherent integration of M-file Toolboxes in any module sequence of the control-engineering software environment ANDECS.< >

关键词： MATLAB design engineering Data engineering Communication system control Mathematical model Spatial databases Visual databases control design Packaging Trademarks

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A graphical matrix editor to be used in ANDECS/MATLAB computation environments

A graphical matrix editor to be used in ANDECS/MATLAB comput...

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IEEE International Symposium on Computer Aided control system design (CACSD)

作者： R. Finsterwalder E.G. Berger G. Grubel Control Design Engineering Institute for Robotics and System Dynamics DLR-Oberpfaffenhofen Wessling Germany

Application and programming aspects of a portable graphical matrix editor are described. The editor is realized based on the X-Windows/Motif user interface library. It can be used as a stand-alone matrix data input and-display facility which is independent of a particular programming system. It can also be used as a module within interactive computation environments, like ANDECS or MATLAB, using client/server process communication or the MEX-file facility of MATLAB.< >

关键词： MATLAB Graphical user interfaces Computer interfaces Portable computers Dynamic programming Communication system control control systems Character recognition Trademarks control design

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ANDECS: a computation environment for robot-dynamics design automation

ANDECS: a computation environment for robot-dynamics design ...

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IEEE International Conference on robotics and Automation (ICRA)

作者： G. Grubel R. Finsterwalder H.-D. Joos A. Lewald M. Otter DLR Oberpfaffenhofen Control Design Engineering Institute for Robotics and System Dynamics Wessling Germany

Features of an available computation environment for robot-dynamics design are described. These are environments for object-oriented mechatronics/robot dynamics modeling, for executing dynamics simulation experiments, for multiobjective parameter and trajectory optimization, and for multivariate result visualization. The environments have a common look and feel and are coherently integrated using an engineering database system.< >

关键词： robotics and automation design automation Object oriented modeling Mechatronics design engineering systems engineering and theory Physics computing Robots Computational modeling Data engineering

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