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| Optimal decentralized control of large scale systems |
| X.Q.Shi,D.E.Davison,R.Kwong,E.J.Davison |
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| (Systems Control Group, Department of Electrical and Computer Engineering, University of Toronto, Ontario, Canada, M5S 3G4) |
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| 摘要: |
| This paper presents a new optimized decentralized controller design method for solving the tracking and disturbance rejection problems for large-scale linear time-invariant systems, using only low-order decentralized controllers. To illustrate the type of results which can be obtained using the new optimized decentralized control design method, the control of a large flexible space structure is studied and compared with the standard centralized LQR-observer controller. The order of the resultant decentralized controller is much smaller than that of the standard centralized LQR-observer controller. The proposed controller also has certain fail-safe properties and, in addition, it can be five orders of magnitude more robust than the standard LQR-observer controller based on their real stability radii. The new decentralized controller design method is applied to a large flexible space structure system with 5 inputs and 5 outputs and of order 24. |
| 关键词: Decentralized control, multivariable control, PID control, robustness, optimization, large-scale systems, flexible structures |
| DOI： |
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| 基金项目:This work was supported by the Natural Sciences and Engineering Research Council of Canada (No. A4396). |
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| Optimal decentralized control of large scale systems |
| X. Q. Shi,D. E. Davison,R. Kwong,E. J. Davison |
| (Systems Control Group, Department of Electrical and Computer Engineering, University of Toronto, Ontario, Canada, M5S 3G4;Department of Electrical and Computer Engineering, University of Waterloo, Ontario, Canada, N2L 3G1) |
| Abstract: |
| This paper presents a new optimized decentralized controller design method for solving the tracking and disturbance rejection problems for large-scale linear time-invariant systems, using only low-order decentralized controllers. To illustrate the type of results which can be obtained using the new optimized decentralized control design method, the control of a large flexible space structure is studied and compared with the standard centralized LQR-observer controller. The order of the resultant decentralized controller is much smaller than that of the standard centralized LQR-observer controller. The proposed controller also has certain fail-safe properties and, in addition, it can be five orders of magnitude more robust than the standard LQR-observer controller based on their real stability radii. The new decentralized controller design method is applied to a large flexible space structure system with 5 inputs and 5 outputs and of order 24. |
| Key words: Decentralized control, multivariable control, PID control, robustness, optimization, large-scale systems, flexible structures |
