Robust Performance of Decentralized Control Systems by Independent Designs
Sigurd Skogestad,Manfred Morari +1 more
- Iss: 24, pp 1325-1330
TLDR
In this paper the decentralized control problem is formulated as a series of independent designs, and simple bounds on these individual designs are derived, which when satisfied, guarantee robust performance of the overall system.Abstract:
Decentralized control systems have fewer tuning parameters, are easier to understand and tune, and are more easily made failure tolerant than general multivariable control systems. In this paper the decentralized control problem is formulated as a series of independent designs. Simple bounds on these individual designs are derived, which when satisfied, guarantee robust performance of the overall system. The results provide a generalization of the ?-Interaction Measure introduced by Grosdidier and Morari (1986).read more
Citations
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Robust performance of cross-directional basis-weight control in paper machines
TL;DR: The response of an important actuator for basis-weight control, the paper machine slice, is described by a single dimensionless design parameter that provides considerable insight about the CD response control problem.
Journal ArticleDOI
Decentralized PI/PID controllers based on gain and phase margin specifications for TITO processes.
TL;DR: An independent PI/PID controller is designed for each reduced order decoupled subsystem to obtain the desired gain and phase margins, and the performance is verified on the original interactive system to show the effectiveness of the proposed design method for the general class of TITO systems.
Journal ArticleDOI
Centralized PI controllers for interacting multivariable processes by synthesis method.
TL;DR: Two methods of designing a centralized control system for multi-input, multi-output (MIMO) processes are presented and the proposed centralized controllers reduce the interactions better than recently reported decentralized controllers do.
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Variable selection for decentralized control
Sigurd Skogestad,Manfred Morari +1 more
TL;DR: In this article, several tests for eliminating pairings which are not decentralized integral controllable DIC are presented in terms of diierent measures of the sign of steady state gain matrix, including RGA, the determinant and eigenvalues.
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Design of Multi-loop PID Controllers Based on the Generalized IMC-PID Method with Mp Criterion
TL;DR: In this article, a new method of designing multi-loop PID controllers is presented in which the optimization problem involved in finding the PID parameters is efficiently simplified to find the optimum closed-loop time constant in a reduced search space.
References
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Proceedings ArticleDOI
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Robust control of ill-conditioned plants: high-purity distillation
TL;DR: In this article, a high-purity distillation column is used to explain the physical reason for poor conditioning and its implications on control system design and performance, and it is shown that an acceptable performance/robustness tradeoff cannot be obtained by simple loop-shaping techniques (using singular values) and that a good understanding of the model uncertainty is essential for robust control systems design.
Journal ArticleDOI
Interaction measures for systems under decentralized control
Pierre Grosdidier,Manfred Morari +1 more
TL;DR: Rigorous relationships are derived in this study linking the RGA to closed-loop stability and robustness with respect to model uncertainty, and a new dynamic IM is defined for multi-variable systems under feedback with diagonal or block-diagonal controllers.