PID control schemes have been widely used for various process control systems. However, most processes are represented by multivariable systems with ambiguous time-delays. Therefore, it is necessary to consider how to choose a suitable set of PID parameters for such systems. In this paper, a design scheme of multiloop robust PID control systems is proposed for multivariable systems. The PID parameters are calculated based on the relationship between the PID control and the generalized predictive control laws. The effectiveness of the newly proposed scheme is numerically evaluated on a simulation example.
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