Comparative Study on Control Method for Two-Mass Systems

Abstract

This paper presents a review of control methods for two-mass systems, either in speed control or position control. When 
flexible couplings or long shafts with low stiffness are used to connect the actuator with other elements, the finite but small 
elasticity of the shaft gets magnified and has a vibrational effect on the load position, which may reduce positioning 
accuracy. Many control methods have been developed to solve this problem. On the other hand, one-mass systems are only 
applicable in the case of rigid couplings with high stiffness and there are no flexible elements. Fundamental concepts of 
two-mass systems and their control methods are reviewed and explained in either linear or rotary systems.