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research-article

Active control of longitudinal vibration of a time-varying shafting system with a dynamic interpolating adaptive method

[+] Author and Article Information
Zheng Hongbo

State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, China
zhenghongbo_baron@sjtu.edu.cn

Fang Hu

School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
hufang@whut.edu.cn

Hui Qin

State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, China
narlia525@sjtu.edu.cn

Zhiyi Zhang

State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University; Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Dongchuan Road 800, Shanghai 200240, China
chychang@sjtu.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4040676 History: Received November 29, 2017; Revised June 25, 2018

Abstract

An adaptive control method with dynamic interpolation is proposed for the active longitudinal vibration control of propulsion shafting systems. In such systems, the dynamics of longitudinal vibration change with the speed-dependent stiffness, which can result in a time-varying system as the shaft speed changes with time. A longitudinal vibration model is established for the investigation of the dynamic interpolating adaptive method (DIAM). In this model, the longitudinal vibration is induced by the disturbance exerted on the propeller (the left mass) and the control force is exerted on the thrust bearing (the right mass), which defines the disturbance channel and the control channel. The purposed DIAM is used to suppress longitudinal vibration transmission from the propeller to the thrust bearing by applying an active force on the right mass. The interpolation technique in DIAM updates the parameter-dependent compensator dynamically and eliminates the influence of parameter-dependent dynamics on the stability of control. Simulation results have demonstrated that the proposed DIAM is effective in suppressing longitudinal vibration of thrust bearing in comparison to conventional adaptive methods.

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