scholarly journals A general vibration control methodology for human‐induced vibrations

2019 ◽  
Vol 26 (10) ◽  
Author(s):  
Xidong Wang ◽  
Emiliano Pereira ◽  
Jaime H. García‐Palacios ◽  
Iván M. Díaz
Keyword(s):  
Vibration Control ◽  
Control Methodology

Vibration Suppression in a Tension-Aligned Structure Through Sequential Application and Removal of Constraints

2012 ◽  
Author(s):  
Tingli Cai ◽  
Ranjan Mukherjee ◽  
Alejandro R. Diaz
Keyword(s):  
Vibration Control ◽  
High Frequency ◽  
Vibration Suppression ◽  
Primary Role ◽  
Accurate Knowledge ◽  
Array Structure ◽  
System States ◽  
Aligned Array ◽  
Control Methodology

We present an efficient method for vibration suppression in a tension-aligned array structure using constraint actuators. The primary role of constraint actuators is to cyclically apply and remove constraints such that vibration energy is efficiently funneled into high-frequency modes of the structure, where it can be dissipated quickly and naturally due to high rates of damping. A cycle of constraint application and removal can never add energy and hence the method can potentially achieve vibration control without accurate knowledge of the system states. The vibration control methodology is applied to a tension-aligned array structure supported by a structure in compression. Our approach for vibration suppression has the potential to positively influence the development of tension-aligned architectures which are contemplated for large precision apertures in space.

Robust Kalman-Filter-Based Frequency-Shaping Optimal Active Vibration Control of Uncertain Flexible Mechanical Systems with Nonlinear Actuators

2003 ◽  
Vol 9 (6) ◽  
pp. 623-644 ◽  
Author(s):  
Shinn-Horng Chen
Keyword(s):  
Vibration Control ◽  
Active Vibration Control ◽  
Time Varying ◽  
Time Varying Parameter ◽  
Robust Kalman Filter ◽  
Parameter Perturbations ◽  
Actuator Nonlinearities ◽  
Active Vibration ◽  
Control Methodology ◽  
Flexible Mechanical System

In this paper, we present a time-domain control methodology, called the robust Kalman-filter-based frequency-shaping optimal feedback (KFBFSOF) control method. Using this method, we treat the active vibration control (or active vibration suppression) problem of flexible mechanical systems under simultaneously high-frequency unmodeled dynamics, residual modes, linear time-varying parameter perturbations in both the controlled and residual parts, noises (input noise and measurement noise), noise uncertainties and actuator nonlinearities. Two robust stability conditions are proposed for the flexible mechanical system, which is controlled by a KFBFSOF controller and subject to mode truncation, noise uncertainties, actuator nonlinearities and linear structured time-varying parameter perturbations simultaneously. The advantage of the presented KFBFSOF control methodology is that it can make the controlled closed-loop system have both good robustness at high frequencies and good performance at low frequencies. Besides, the proposed robust stability criteria guarantee that the designed KFBFSOF controller can make the controlled flexible mechanical system avoid the possibilities of instability induced by both spillover and time-varying parameter perturbations. Two examples are given to illustrate the application of the presented control methodology to the active vibration control problems of a simply-supported flexible beam and of a flexible rotor system.

Robust Kalman-Filter-Based Frequency-Shaping Optimal Active Vibration Control of Uncertain Flexible Mechanical Systems

2000 ◽  
Vol 16 (3) ◽  
pp. 145-155 ◽  
Author(s):  
Shinn-Horng Chen ◽  
Jyh-Horng Chou ◽  
Liang-An Zheng
Keyword(s):  
Vibration Control ◽  
Active Vibration Control ◽  
Time Varying ◽  
High Frequencies ◽  
Time Varying Parameter ◽  
Robust Kalman Filter ◽  
Parameter Perturbations ◽  
Active Vibration ◽  
Control Methodology ◽  
Flexible Mechanical System

ABSTRACTThis paper presents a time-domain control methodology, which is named as the robust Kalman-filter-based frequency-shaping optimal feedback (KFBFSOF) control method, to treat the active vibration control (or active vibration suppression) problem of flexible mechanical systems under simultaneously high frequencies unmodelled dynamics, residual modes, linear time-varying parameter perturbations in both the controlled and residual parts, noises (input noise and measurement noise),and noise uncertainties. Two robust stability conditions are proposed for the flexible mechanical system, which is controlled by a KFBFSOF controller and subject to mode truncation, noise uncertainties, and linear structured time-varying parameter perturbations simultaneously. The advantage of the presented KFBFSOF control methodology is that it can make the controlled closed-loop system to obtain both good robustness at high frequencies and good performance at low frequencies. Besides, the proposed robust stability criteria guarantee that the designed KFBFSOF controller can make the controlled flexible mechanical system to avoid the possibilities of both spillover-induced instability and time-varying-parameter-perturbation-induced instability. Two examples are given to illustrate the application of the presented control methodology to the active vibration control problems of a simply supported flexible beam and of a flexible rotor system.

A Feedback and Feedforward Vibration Control for a Concrete Placing Boom

2011 ◽  
Vol 133 (5) ◽  
Author(s):  
G. Cazzulani ◽  
F. Resta ◽  
F. Ripamonti
Keyword(s):  
Vibration Control ◽  
Mechanical Stress ◽  
Active Control ◽  
Experimental Test ◽  
Working Life ◽  
Test Rig ◽  
Control Logic ◽  
Multibody Model ◽  
Large Motion ◽  
Control Methodology

Concrete placing booms are subjected to vibrations that increase mechanical stress and reduce the boom’s working life. The aim of this paper is to develop an active control methodology to suppress boom vibrations using the same actuators that produce the large motion of the boom. The control logic is based on two contributions, a feedforward and a feedback one. In this study, a nonlinear flexible multibody model was created to simulate the boom’s dynamic behavior. This model was also used to develop and test the control logic. Finally, the control methodology was validated on an experimental test rig.

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