抄録
One of the important application fields of fluidics is the process controller. There are servral reports on fluidic process controllers, but none on a controller with PID control modes.
The PID controller herein reported is composed of wall-attachment fluidic elements and operates with a PWM signal and a differential type algorithm. The input error signal is pulse-width modulated, and the PWM signal is delayed first by one period and then by two periods. The output difference is obtained by addition and subtraction of the original and delayed PWM signals, and then integrated by capacity.
The characteristics of the controller are discussed here theoretically and experimentally.
