论文信息 - Controller transfer under sampling rate dynamic changes

Controller transfer under sampling rate dynamic changes

In this paper, the effects due to changes in the sampling period of digital controllers are analyzed. The swapping between controllers could produce instability problems and, in any case, the control performances could be degraded. In order to minimize this effect, the new control actions are computed based on the new controller parameters and estimations of the required past values of the state or appropriated sequences of its input and output. The proposed algorithm uses interpolation and numerical optimization to evaluate the value of these variables at the new sampling periods for the next controller. The improvements obtained by this approach are shown by simulation examples.

P. Albertos | A. Valera | M. Valles

[1] R. Decarlo,et al. Perspectives and results on the stability and stabilizability of hybrid systems , 2000, Proceedings of the IEEE.

[2] Lui Sha,et al. On task schedulability in real-time control systems , 1996, 17th IEEE Real-Time Systems Symposium.

[3] Sang Hyuk Son,et al. The case for feedback control real-time scheduling , 1998, Proceedings of 11th Euromicro Conference on Real-Time Systems. Euromicro RTS'99.

[4] Karl-Erik Årzén,et al. TrueTime: Simulation of Control Loops Under Shared Computer Resources , 2002 .

[5] Tom Tietenberg,et al. Theory and design , 2001 .

[6] Alberto Isidori,et al. Trends in Control , 1995 .

[7] A. Michel. Recent trends in the stability analysis of hybrid dynamical systems , 1999 .

[8] Astrom. Computer Controlled Systems , 1990 .

[9] Julián Salt,et al. Digital Regulators Redesign with Irregular Sampling , 1990 .

[10] A. Stephen Morse,et al. Control Using Logic-Based Switching , 1997 .

[11] Roberto Sanchis,et al. Initializing Parameter Estimation Algorithms Under Scarce Measurements , 2003 .

[12] A. Morse,et al. Basic problems in stability and design of switched systems , 1999 .

[13] Karl Johan Åström,et al. Computer-Controlled Systems: Theory and Design , 1984 .

[14] Giuseppe Lipari,et al. Elastic task model for adaptive rate control , 1998, Proceedings 19th IEEE Real-Time Systems Symposium (Cat. No.98CB36279).