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Title: Development of a GPC-based PID controller for unstable systems with deadtime
Authors: Tan, K.K. 
Huang, S.N.
Lee, T.H.
Issue Date: 28-Feb-2000
Citation: Tan, K.K., Huang, S.N., Lee, T.H. (2000-02-28). Development of a GPC-based PID controller for unstable systems with deadtime. ISA Transactions 39 (1) : 57-70. ScholarBank@NUS Repository.
Abstract: Till now, traditional low-order control schemes have never been applicable to unstable systems with deadtime. In this paper, we present the first application of a PID controller with time-scheduled gains to unstable systems with deadtime, consisting of a single unstable pole. The control gains are designed based on a generalised predictive control (GPC) approach. The only user specifications required are simple and classical desired properties as in the natural frequency and the damping ratio of the closed-loop system. An approach is further developed to subsequent on-line self-tuning of control weights so that the overall control system remains applicable and effective in the face of disturbances and slowly varying dynamics. A detailed analysis of the closed-loop stability of the thus designed control system is further provided in the paper. Based on stability conditions developed, the prediction horizon for the GPC-based controller may be effectively computed. Finally, simulation examples illustrate the performance of the control system.
Source Title: ISA Transactions
ISSN: 00190578
DOI: 10.1016/S0019-0578(99)00036-1
Appears in Collections:Staff Publications

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