Describes a graphical evaluation of the robust stability in the frequency domain based on the results from our previous paper (1996) in which the extension of Popov's criterion to discrete-time systems was express...
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Describes a graphical evaluation of the robust stability in the frequency domain based on the results from our previous paper (1996) in which the extension of Popov's criterion to discrete-time systems was expressed in an explicit form. The controlsystem described herein is a sampled-data controlsystem with one time-invariant nonlinear element (sector nonlinearity) in the forward path. Considering the application to computer-aidedcontrolsystemdesign (cacsd), we present an evaluation method of the robust stability in connection with the size of sector nonlinearity and the gain margin on a gain-phase diagram (i.e. a modified Nichols chart). We show two results as numerical examples: one is where Aizerman's conjecture was approved, and the other is where it was not.
The availability of powerful PCs, and PC based computeraidedcontrolsystemdesign (cacsd) software packages such as MATLAB has enhanced the development of creative student centered learning activities in control sys...
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ISBN:
(纸本)0780331737
The availability of powerful PCs, and PC based computeraidedcontrolsystemdesign (cacsd) software packages such as MATLAB has enhanced the development of creative student centered learning activities in controlsystem courses. This paper discusses a sequence of exercises that have been developed and used by the author for teaching an undergraduate course in digital control. At the outset of the course, an exercise involving time-domain analysis and simulation of a de servomotor positioning system incorporating a digital controller is used as a vehicle to demonstrate the main features and limitations of digital controlsystems. A second exercise exposes students to digital controller hardware and programming;students develop and implement a PID control algorithm on a PC equipped with an inexpensive analog I/O interface board. This set up is later used as the controller of a bench-scale de servomotor positioning system, The integrated approach ties together the various aspects of digital controlsystem development - modeling, analysis, controller design, verification by simulation, instrumentation, programming, and finally, system implementation.
In this paper we discuss an application of genetic algorithms (GAs) to discrete-time two-degree-of-freedom controlsystems design where various design specifications are required. The design method is based on a pole-...
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ISBN:
(纸本)0780327756
In this paper we discuss an application of genetic algorithms (GAs) to discrete-time two-degree-of-freedom controlsystems design where various design specifications are required. The design method is based on a pole-zero placement considering pole-zero cancellations. The tunable parameters of the controllers are optimized by a new multiobjective GA (MGA). Combining the MGA with the design method we construct a computeraidedcontrolsystemdesign (cacsd) using MATLAB. The effectiveness of the proposed cacsd is demonstrated by a numerical design example. The MGA is compared with-an established optimization algorithm in MATLAB OPTIMIZATION TOOLBOX.
Without appropriate tools to implement new controllers quickly and safely, the tightening development schedules cannot be met anymore. This paper addresses the issue of rapid control prototyping (RCP). With RCP there ...
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ISBN:
(纸本)0780330323
Without appropriate tools to implement new controllers quickly and safely, the tightening development schedules cannot be met anymore. This paper addresses the issue of rapid control prototyping (RCP). With RCP there is a smooth and fast transition from a design concept to its experimental verification.
This paper shows an application of how to use the Matlab-Simulink Real-Time Workshop environment for helping in some control Lab Course. The main goal is to use a cacsd (computeraidedcontrolsystemdesign) environme...
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ISBN:
(纸本)0818676493
This paper shows an application of how to use the Matlab-Simulink Real-Time Workshop environment for helping in some control Lab Course. The main goal is to use a cacsd (computeraidedcontrolsystemdesign) environment in order to automate the implementation of a Real-Time controller. That is to say, once the controller is obtained and validated by simulation, it is implemented in the real process, a mobile robot, by means of the Matlab Real-Time Workshop. The main benefit of this method is that students can see immediately the effect of their controller when it is applied to the real plant without losing themselves in C programming.
This paper is about control analysis, synthesis and verification of hybrid controlsystems (HCSs). Two kind of I/O automata are presented for modeling the extended plant of HCSs. DES I/O automata are defined by additi...
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ISBN:
(纸本)0780330323
This paper is about control analysis, synthesis and verification of hybrid controlsystems (HCSs). Two kind of I/O automata are presented for modeling the extended plant of HCSs. DES I/O automata are defined by additionally introducing control alphabet, input and output events. Timed I/O automata are defined based on DES I/O automata by taking time delay into consideration. The decision-maker can be synthesised by using the proposed models. Some rules are presented for partial verification of correctness of the design. An inverted pendulum is used to illustrate our modeling techniques and proposed methods for control synthesis and verification.
Recently, it has been proposed that the integration of traditional computeraided Software/systems Engineering (CASE) and computeraidedcontrolsystems design (cacsd) tools would provide improved hybrid systems devel...
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Recently, it has been proposed that the integration of traditional computeraided Software/systems Engineering (CASE) and computeraidedcontrolsystems design (cacsd) tools would provide improved hybrid systems development support for the automotive powertrain control community. In this paper, we present the application of two new CASE/cacsd products to a simplified powertrain system model. These two tools are (1) a co-code generation interface between the CASE modeling tool Statemate and the cacsd tool MATRIX and (2) structured and hybrid modeling extensions to MATLAB and SIMULINK. A discussion of each tool's capabilities and limitations, in the context of automotive powertrain control, is included.
An overview over the CDIF (CASE Data Interchange Format) family of standards with emphasis on the CDIF architecture is given. CDIF supports both batch and dynamic data exchange between computeraided software engineer...
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An overview over the CDIF (CASE Data Interchange Format) family of standards with emphasis on the CDIF architecture is given. CDIF supports both batch and dynamic data exchange between computeraided software engineering and related tools, and repositories. One working group within the CDIF technical committee focuses on interchanging cacsd (computeraidedcontrolsystems design) models. An overview over the goal and approach of CDIF/cacsd is given. CDIF/cacsd allows true interoperability between tools, allowing the user not only to import and export cacsd models in a standard format, but also to dynamically inquire tools about model data and to seamlessly integrate with tools supporting non-cacsd paradigms like CASE tools.
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