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Self-adaptive design of a nonlinear temperature control system

 

作者: A.Chotai,   P.C.Young,   M.A.Behzadi,  

 

期刊: IEE Proceedings D (Control Theory and Applications)  (IET Available online 1991)
卷期: Volume 138, issue 1  

页码: 41-49

 

年代: 1991

 

DOI:10.1049/ip-d.1991.0006

 

出版商: IEE

 

数据来源: IET

 

摘要:

The paper describes the design and implementation of an unusual self-adaptive temperature control system for a nonlinear heated bar system. The design is based on a proportional-integral-plus (PIP) control scheme, combined with a special recursive algorithm which continually updates the estimates of the rapidly variable parameters which characterise a piecewise-linear model of the heated bar system. Amongst the novel features of this true digital control (TDC) system design are: the nonminimum states-space (NMSS) formulation of the control problem, which allows for state-variable feedback pole assignment using only sampled input and output signals in the control law; the incorporation ofa prioriinformation on the physical nature of the system into the recursive estimation algorithm in order to enhance its parameter tracking capabilities; the exploitation of multirate sampling; and the implementation of the linear PIP control law in a bang-bang mode using pulsewidth modulation.

 

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