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| 2. |
- Fabian, Martin, 1960, et al.
(författare)
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On nondeterministic supervisory control
- 1996
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Ingår i: Proc of the 35th IEEE Conference on Decision and Control, Kobe, Japan. ; , s. 2213-8
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Konferensbidrag (refereegranskat)
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| 4. |
- Lennartson, Bengt, 1956, et al.
(författare)
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Hybrid Systems in Process Control
- 1996
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Ingår i: IEEE Control Systems. - : Institute of Electrical and Electronics Engineers (IEEE). - 1066-033X .- 1941-000X. ; 16:5, s. 45-56
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Tidskriftsartikel (refereegranskat)abstract
- Modeling and control of hybrid systems, with particular emphasis on process control applications, are considered in this article. Based on a number of observations on typical mixed discrete and continuous features for such applications, a fairly general model structure for hybrid systems is proposed.This model structure, which clearly separates the open-loop plant from the closed-loop system, is suitable for analysis and synthesis of hybrid control systems. To illustrate this, three different approaches for control-law synthesis based on continuous and discrete specifications are discussed. In the first one, the hybrid plant model is replaced by a purely discrete event model, related to the continuous specification, and a supervisor is synthesized applying supervisory control theory suggested by Wonham-Ramadge. The other two methods directly utilize the continuous specification for determination of a control event generator, where time-optimal aspects are introduced as an option in the last approach.
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| 8. |
- Pettersson, Stefan, 1969, et al.
(författare)
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Stability and robustness for hybrid systems
- 1996
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Ingår i: Proc. of the 35th IEEE Conference on Decision and Control, Kobe, Japan, DEC 11-13. ; , s. 1202-1207
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Konferensbidrag (refereegranskat)abstract
- Stability and robustness issues for hybrid systems are considered in this paper. Present stability results, that are extensions of classical Lyapunov theory, are not straightforward to apply in general due to two reasons. First, existing theory do not unveil how to find needed Lyapunov functions. Secondly, at some time instants it is necessary to know the values of the continuous trajectory. Because of these drawbacks, stronger conditions for stability are suggested. The search for Lyapunov functions can then be formulated as a linear matrix inequality problem. Additionally; it is shown how to obtain robustness properties. An example illustrates the results.
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