Process Parameter Estimation and Self Adaptive Control

The paper describes a method of automatic process parameter estimation which has been mechanised with the aid of hybrid (analogue-digital) equipment. The technique is characterised by it’s simplicity, and differs from earlier schemes of this type in not requiring direct measurement of the input and output time derivatives of the process. The performance of the system is discussed, with particular reference to the effect of uncertainty on the sampled data caused by spurious noise contamination. Finally, a simple identification-adaptive control system for a nonstationary process is described, which utilises the hybrid parameter estimation techniques.