Control Methods for Pneumatic Servo Systems

In engineering practice, there are many nonlinear problems in pneumatic servo systems, such as parameter uncertainty, dead zone, saturation, and so on. Therefore, the pneumatic servo system should be regarded as a nonlinear system rather than a simple linear system. Obviously, dealing with nonlinear problems based on a nonlinear system is a challenging problem, which is the key point to improve the accuracy, rapidity, and stability of position control in the pneumatic servo systems. At present, researchers have applied various nonlinear control methods to deal with the nonlinear problems in the pneumatic servo systems, such as active disturbance rejection control(ADRC), backstepping method, sliding mode control(SMC), and finite-time control method. Overview of the recent research on the above methods is given in this chapter.