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Sampled-data H∞-c...
Sampled-data H∞-control for time-varying hybrid systems
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- Christiansson, Anna-Karin, 1947- (författare)
- Högskolan Väst,Avd för automation och datateknik
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- Lennartson, Bengt (författare)
- Chalmers University of Technology, Control Engineering Lab, Göteborg, Sweden
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- Toivonen, H.T. (författare)
- Åbo Akademi University, Department of Chemical Engineering, Åbo, Finland.
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(creator_code:org_t)
- 2001
- 2001
- Engelska.
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Ingår i: Dynamics of continuous, discrete and impulsive systems. - 1201-3390 .- 1918-2538. ; 8:4b, s. 427-444
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Abstract
Ämnesord
Stäng
- This paper presents sampled-data H∞-control of linear mixed continuous-time and discrete-time systems, including a mix of continuous-time and discrete-time performance signals and disturbances. However, neither continuous-time control signals nor continuous-time measurements are included. The sampling may well be multirate, i.e. different signals may be sampled by different rates, as long as a periodic pattern is repeated over the period, consisting of a number of sampling steps. In fact, the results are applicable even to arbitrary linear time-varying systems. The sampled-data system is discretised such that the continuous-time performance is reflected in the discretised or "lifted" system. This lifted system is combined with discrete-time updates at the sampling instants to achieve the sampled-data controller. The "hold-states" case is presented as a special application, when there is also a hold circuit at the controller output. The continuous-time Riccati equations with discrete-time updates then can be replaced by one discrete-time static feedback and filter Riccati equation respectively, which also reflect the intersample behaviour. Furthermore, convergence results between the discretised Riccati solutions and the corresponding continuous-time solutions are shown, when the sampling interval decreases towards zero. Simulations are shown when the results are applied to the control of a MIMO jet-engine model.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Reglerteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Control Engineering (hsv//eng)
Nyckelord
- Produktions- och materialteknik
- Manufacturing and materials engineering
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- ref (ämneskategori)
- art (ämneskategori)
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