Omron Corporation

Zhang Zhiming

Tamio Ueda

Yoshihiro Nagami

Yumi Saito

A PID control device identifies rise characteristics of a controlled system by a step response method on changing a reference, moves to PID control when idle time and slope successively obtained at the rise reach a predetermined condition, and computes PID control parameters based on the idle time and slope obtained up to that point. If the identification is fully executed, the computed PID control parameters are immediately set. If it is not fully executed, the PID control device 1 further watches the state to compare a proportional gain of the newly computed PID control parameters with the proportional gain of previously set PID control parameters, and the currently computed PID control parameters are set when the parameters are on a safe side.

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Takatsuki, Japan

Zhang Zhiming