Control design for a switched system including time delay depending on input polarity and its application to a pneumatic isolation table

Abstract

In the present paper, we discuss control design of switching system for a pneumatic isolation table including different time delays depending on control input polarity. The control performance of the pneumatic isolation table depends on input time delay, and the input time delay is determined by response speed of valve and pipe length. Especially, when the valve response speed and the pipe length are different between the supply side and the exhaust side, the input time delay differs depending on the input polarity. Therefore, we design the control system to switch the system to the pneumatic isolation table based on the input polarity. In the present paper, a control design is discussed and the effectiveness of the proposed method is verified by numerical simulations and experiment at results.