Servo System Of Adaptive Sliding Mode Control Strategy Research

As everyone knows, the fundamental role of the press is to achieve rapid prototyping products through the change of stamping process, stamping process is very high precision of press, safety requirements, and the precision of the press not only depends on the motor itself, but also its driving control strategy is closely related to the control device.Press the servo motor system working environment is bad, such as servo press,uncoiling machine, CNC machining equipment are easy to system parameter perturbation and load characteristics of large range etc.. As the servo press servo motor syst em is directly connected with the punch, effect on product quality, is the key, according to the servo motor structure and slide motion control system model diagram shows the speed loop and a displacement sensor, encoder and servo motor position loop stability is directly related to the slide motion control system, but because of there is a mechanical gap between the sliding block and the connecting rod, the connecting rod and the ball screw of institutions such as reality, lead to the chattering problem for speed and displacement of ring is more obvious. The displacement loop as the outer l oop of the system, direct response controller accuracy, therefore need to have fast response performance, the value of tracking control requirements of the instantaneous speed loop is mainly in order to adapt to the dynamic performance of the system is changed, the input speed controller for a given speed and feedback speed difference value, output as given the value of the current loop, conventional Pm control rule of selecting control speed, can also choose other control methods according to the system performance requirements,such as fuzzy control, neural network control, sliding mode va riable structure control.This study uses servo motor servo press as the main body, selection ofsliding mode variable structure control as the control method, the parameters of servo press servo motor control system is higher, so the sliding mode variable structure control research is generally for the position loop and speed loop, its research is mainly based on vector control and solve the system parameters change and load disturbance on The influence of control to meet the requirements of high performance servo system dynamic and static performance. Servo motor system is a typical uncert ain system, which has a strong influence on the system parameters perturbation and external disturbance. Sliding mode control has strong robustness to satisfy the matching conditions system parameter perturbation and external disturbance, to further improve the dynamic performance of the press motor servo system, through system modeling, structure analysis and simulation experiment the research object structure, using an improved integral sliding mode adaptive control strategy to achieve rapid and effective control of servo motor the. Simulation results show that the proposed method can impr ove the dynamic performance of the servo motor, and can improve the accuracy, robustness and robustness of the system by sliding mode variable structure control.