非線形オブザーバによる双線形システムの特性変動の動的補償法

概要

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Industrial processes such as thermal, fluidic and chemical systems can be modeled as bilinear systems. These bilinear systems are, in most cases, linearized at one operating state and linear control systems are constructed. When that operating state is shifted to other state, the control performance in degraded and controller parameters are required to be readjusted. This fact is based upon the change of the system dynamic characteristics due to the shift of the operating state. In this paper, we propose a dynamic compensating method using three kinds of nonlinear observers for bilinear systems whose estimated states are fedback for globally linearizing the system dynamics and discuss the reduction of the effects of system characteristic changes. These problems are solved based upon the differential geometric approach. Simulation of simple thermal systems shows that the effects of some changes of operating states are favorably compensated by this compensator.
社団法人日本機械学会の論文
1992-08-25