Servo Control Strategy of Single Axis Shaking Table in Active Structural Control System

2011 ◽  
Vol 58-60 ◽  
pp. 2446-2449
Author(s):  
Zhi Yong Qu ◽  
Zheng Mao Ye
Keyword(s):  
Control System ◽  
Structural Control ◽  
Control Algorithm ◽  
Servo Control ◽  
Shaking Table ◽  
Hydraulic Actuator ◽  
Feed Forward Control ◽  
Active Structural Control ◽  
Actuation System ◽  
Proposed Model

The purpose of this paper is to develop an approach to improve the tracking characteristics of a single axis shaking table actuation system, which is used in active structural control system. Firstly, the process of constructing analytical model of servo-hydraulic actuation system is presented. The proposed model, in the form of the total shaking table transfer function, accounts for the specific physical characteristics of the single axis shaking table. Due to low natural frequency and small hydraulic actuator damping, the single axis shaking table cannot meet the experimental requirement Therefore, three states feedback and three state feed-forward control algorithm based on pole-assignment principle is applied to extend the acceleration bandwidth. Lastly, the shaking table experiments are tested and the experimental results indicate that the controller is effective and reliable.

Control Algorithms for Semi-Active Structural Systems: Do they Really Matter?

2008 ◽  
Vol 56 ◽  
pp. 182-187
Author(s):  
Antonio Occhiuzzi
Keyword(s):  
Control System ◽  
Control Systems ◽  
Active Control ◽  
Structural Control ◽  
Control Algorithm ◽  
Scientific Literature ◽  
Control Algorithms ◽  
Control Law ◽  
Structural Systems ◽  
Active Structural Control

Control algorithms for semi-active structural control system found in the scientific literature often rely on the choice of several parameters included in the control law. The present paper shows the preliminary conclusions of a study aiming to explain the weak dependency of the response reduction associated to semi-active control systems on the particular choice of the control algorithm adopted, provided that the relevant parameters of any control law be properly tuned.

Feasibility study of an adaptive mount system based on magnetorheological elastomer using real-time hybrid simulation

2018 ◽  
Vol 30 (5) ◽  
pp. 701-707 ◽  
Author(s):  
Seung-Hyun Eem ◽  
Jeong-Hoi Koo ◽  
Hyung-Jo Jung
Keyword(s):  
Magnetic Field ◽  
Control System ◽  
Real Time ◽  
Control Algorithm ◽  
Vibration Reduction ◽  
Hybrid Simulation ◽  
Shaking Table ◽  
Magnetorheological Elastomer ◽  
Experimental Part ◽  
Hybrid Simulations

This article investigates an adaptive mount system based on magnetorheological elastomer in reducing the vibration of an equipment on the isolation table. Incorporating MR elastomers, whose elastic modulus or stiffness can be adjusted depending on the applied magnetic field, the proposed mount system strives to alleviate the limitations of existing passive-type mount systems. The primary goal of this study is to evaluate the vibration reduction performance of the proposed MR elastomer mount using the hybrid simulation technique. For real-time hybrid simulations, the MR elastomer mount and the control system are used as an experimental part, which is installed on the shaking table, and an equipment on the table is used as a numerical part. A suitable control algorithm is designed for the real-time hybrid simulations to avoid the responses of the equipment’s natural frequency by tracking the frequencies of the responses. After performing a series of real-time hybrid simulation on the adaptive mount system and the passive-type mount system under sinusoidal excitations, this study compares the effectiveness of the adaptive mount system over its passive counterpart. The results show that the proposed adaptive elastomer mount system outperforms the passive-type mount system in reducing the responses of the equipment for the excitations considered in this study.

Active Structural Control Based on Integration ofΗ∞Control and Equivalent-Input-Disturbance Approach

2016 ◽  
Vol 20 (2) ◽  
pp. 197-204 ◽  
Author(s):  
Mingxing Fang ◽  
◽  
Lijun Wu ◽  
Jing Cheng ◽  
Youwu Du ◽  
...  
Keyword(s):  
Control System ◽  
Structural Control ◽  
Control Structure ◽  
Vibration Signal ◽  
Control Input ◽  
Building Structures ◽  
System Configuration ◽  
Input Disturbance ◽  
Active Structural Control ◽  
Equivalent Input Disturbance

This paper describes an approach for suppressing earthquake-induced vibrations of building structures. The design of the control system is based on the equivalent-input-disturbance approach for improving the vibration rejection performance. A control system configuration with a vibration estimator is described, and a method of designing such a control system that employsΗ∞control is presented. The vibration rejection performance is guaranteed by the control structure, in which an equivalent vibration signal on the control input channel is estimated and directly incorporated into the control input. The validity of our method is demonstrated through simulations.

Research on the Interpolation Processing Based on the Acceleration Control Information

2013 ◽  
Vol 655-657 ◽  
pp. 1228-1231
Author(s):  
Fang Song ◽  
Shuang Hui Hao ◽  
Zhi Bo Guo ◽  
Zhi Tao Guo
Keyword(s):  
Control System ◽  
Simulation Experiment ◽  
Servo Control ◽  
Contour Error ◽  
Discrete Point ◽  
Feed Forward ◽  
Feed Forward Control ◽  
Control Information ◽  
Servo Control System ◽  
Novel Method

In order to further improve the accuracy of the trajectory control and reduce the contour error, a novel method is proposed. This method uses a slight arc segment to approximate the trace curve between discrete points based on the acceleration information. The acceleration information of every discrete point will be provided to the servo control system of each axis to execute the acceleration feed forward control, thus realize the arc connection between the interpolation points. Finally, the simulation experiment results verify the effectiveness of the proposed algorithm.

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