Adaptive control of a refrigeration system. Feasibility analysis and controller design

摘要

The aim was to develope adaptive control of a refrigeration system for industrial purposes. The proposed control scheme and controller design methods are described. The STAC (Self-Tuning Adaptive Control) method is principally utilized. This is a design procedure where known system parameters are first chosen and then applied to the unknown system in which the unknown parameters are estimated by an online identification method. The refrigeration system and the control objective are described in addition to the basic principles of adaptive control. Commonly used online identification logarithms and the underlying controller design methods are presented. It is concluded that adaptive control techniques are suitable for the refrigeration system in which plant parameters change with time and are not well known. Some suggestions for improving the method are offered. (AB) (30 refs.).