DSP Implementation of an Active Bearing Mount for Rotors Using Hybrid Control

• Published in: Journal of vibration and acoustics Vol. 122; no. 4; pp. 420 - 428
• Main Authors: Bai, Mingsian R, Luo, Weibin
• Format: Journal Article
• Language: English
• Published: New York, NY ASME 01.10.2000; American Society of Mechanical Engineers
• Subjects: Applied sciences; Bearings, bushings, rolling bearings; Computer science; control theory; systems; Control system synthesis; Control theory. Systems; Drives; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Mechanical engineering. Machine design; Physics; Solid mechanics; Structural and continuum mechanics; Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...); Vibrations and mechanical waves; feedback; linear quadratic Gaussian control; machine bearings; feedforward; vibration control; LQG control; Feedback regulation; Control synthesis; Magnetic force; Digital processing; Experimental study; Implementation; Rolling bearing; Digital signal; Digital control; Mounting; Ball bearing; Active system; Least squares method; Testing equipment; Shaft; Vibration control; Feedforward; Actuator
• DOI: 10.1115/1.1287788
• ISSN: 1048-9002

An on-line active technique for suppressing rotor vibration is proposed. Electromagnetic actuators are mounted on the housing of a ball bearing for generating counter forces to cancel the transverse vibrations due to imbalance, misalignment, and so forth. Controllers based on feedback structure, feedforward structure and hybrid structure are investigated. The multiple channel active control systems are implemented on the platform of a digital signal processor. Numerical simulation and experimental investigations indicate that the proposed methods are effective in suppressing the periodic disturbances. In particular, the hybrid control by using feedback linear quadratic gaussian control and feedforward least mean square algorithm with synthetic reference achieves the best performance in terms of vibration attenuation and convergence speed. [S0739-3717(00)00904-1]