Research on decentralized adaptive active control for a single-layer vibration isolation system

2012 ◽  
Vol 131 (4) ◽  
pp. 3436-3436 ◽  
Author(s):  
Fengyan An ◽  
Hongling Sun ◽  
Xiaodong Li ◽  
Jing Tian
Keyword(s):  
Active Control ◽  
Vibration Isolation ◽  
Single Layer ◽  
Isolation System ◽  
Vibration Isolation System

Active control of precision vibration isolation system.

1991 ◽  
Vol 57 (534) ◽  
pp. 521-526 ◽  
Author(s):  
Yoshiaki IWATA ◽  
Makoto OHSHIO ◽  
Noboru SUZUKI ◽  
Kimio UCHIDA ◽  
Koichi KARASAWA
Keyword(s):  
Active Control ◽  
Vibration Isolation ◽  
Isolation System ◽  
Vibration Isolation System

scholarly journals Vibration Control Method of an Electromagnetic Isolation System Based on LQR and Coevolutionary NGA

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Lei Zhang ◽  
Xiangtao Zhuan
Keyword(s):  
Genetic Algorithm ◽  
Steady State ◽  
Active Control ◽  
Vibration Isolation ◽  
Control Method ◽  
Linear Quadratic Regulator ◽  
State Equation ◽  
Linear Quadratic ◽  
Isolation System ◽  
Vibration Isolation System

An electromagnetic isolation system can dynamically adjust the output characteristic parameters of the system in real time through the active control strategy, which has strong adaptability to the external environment. In order to control the electromagnetic vibration isolation system effectively, an active control method is presented based on the linear quadratic regulator (LQR) approach and the coevolutionary niche genetic algorithm (NGA). In this paper, the dynamical equation and state equation of the electromagnetic isolation system are built, which include the nonlinear relationship between electromagnetic force and coil current and gap. The LQR approach is employed to maintain a steady state of an isolated object on the vibration isolation system. Meanwhile, a coevolutionary niche genetic algorithm is put forward to optimize the parameters in Q and R matrices. Simulation and experimental results demonstrate that the electromagnetic isolation system with the LQR approach and coevolutionary NGA can effectively isolate the vibration and maintain a steady state for an isolated object in comparison with the passive isolation system.

Vibration Analysis and Control of an Active Power-Train Mount System

2013 ◽  
Vol 341-342 ◽  
pp. 966-970
Author(s):  
Guo Chun Sun ◽  
Hui Guo ◽  
Li Xin Xu
Keyword(s):  
Active Control ◽  
Vibration Isolation ◽  
Angular Acceleration ◽  
Linear Quadratic Regulator ◽  
Vertical Acceleration ◽  
Linear Quadratic ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Power Train ◽  
Piezoelectric Stack Actuator

In order to improve the property of automotive power-train vibration isolation, reduce the vibration that is transmitted by the power-train to the vehicle chassis, we adopt an active control mount (ACM) which consists of elastic rubber and piezoelectric stack actuator in the system. A hydraulic mechanism is used in the ACM to achieve higher displacements. Through the analysis of the property of the rubber and piezoelectric stack actuator, a mechanical model of the active vibration isolation system with the active mounts is established. An optimal control algorithm is presented for engine vibration isolation system, the controller is designed according to linear quadratic regulator (LQR) theory, the linear quadratic performance index is composed of the vertical acceleration, pitching angular acceleration, and rolling angular acceleration of the chassis and the control signals. Simulation results show that active control system of ACM, effect in reducing body vibration than the passive system is obvious.

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