Abstract
Multi-Position Identification of Joint Parameters in Ball Screw Feed System Based on Response Coupling
Highlights
Ball screw feed drive system is extensively used in CNC machine tools [1, 2]
Deng et al [10] developed a finite element (FE) model for ball screw feed drive system, where an objective function is established with the minimum error between the measured and simulated values of natural frequency and damping ratio, and the joint parameters of the feed drive system have been identified using an optimization algorithm
Liu et al [19] established the mathematical model of the two-axis feed drive system by using the receptance coupling, and analyzed the influence of worktable positions on the dynamic characteristics of the ball screw feed drive system
Summary
Ball screw feed drive system is extensively used in CNC machine tools [1, 2]. Reliable dynamic models, dynamic characteristics analysis, and servo controller design for ball screw feed drive system are based on accurate joint parameters [3, 4]. The present study aims to achieve an accurate identification method for joint parameters that consider the position change of a worktable, the torsion characteristics and axial characteristics of a ball screw. Liu et al [19] established the mathematical model of the two-axis feed drive system by using the receptance coupling, and analyzed the influence of worktable positions on the dynamic characteristics of the ball screw feed drive system. The work of Liu et al inspired us to utilize the receptance coupling method to identify the joint parameters of the ball screw feed drive system, while considering the position of a worktable and the torsion characteristics of a ball screw. The results showed that the multiposition identification method has higher precision and better robustness
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