Abstract
In this paper, a design scheme of multiloop predictive self-tuning PID control systems is proposed for multivariable systems. The proposed scheme firstly uses a static pre-compensator as an approximately decoupling device, in order to roughly decouple the controlled object. Furthermore, by regarding the approximately decoupled system as a series of single-input single-output subsystems, a single-input single-output PID controller is designed for each subsystem. The PLD parameters are calculated on-line based on the relationship between the PID control and the generalized predictive control laws.
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