Servo Control System Design for Tracking in Machine Axes

Zhouhong Wei, Doctoral Student, Mechanical Engineering, Dale E. Schinstock

Many modern motion control systems are required to achieve high precision and high speed simultaneously. Designing and controlling servo-driven machines with good tracking capabilities, which are high-speed and improved accuracy, have got much attention among academic researchers and industrial engineers. Different kinds of control strategies are proposed to achieve good tracking performance by industrial people and researchers, such as loop shaping design techniques, velocity and acceleration feedforward and zero phase error tracking control, etc. Those methods are really applicable and obtain very good tacking performance in servo driven systems. 

Fundamental control system and three different control design techniques are presented in this presentation. The main purpose is to give a picture of control system and demonstrate practical control algorithms commonly used in industries. Several projects involved control system design are shown at here, which are XY stage machine, Laser cutting machine and Gantry machine.

Laboratory results from these machines demonstrate that with different methods very good tracking performance can be achieved and also comparison between them is shown in this presentation.