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Noise and vibration causes many problems in most of the industrial applications and they have grown in recent years. Active methods of controlling vibration has been of great interest for applications requiring low weight, lower energy consumption, ease of handling, safer operation due to reduced inertia, and high speed applications. Active control involves the use of sensors to sense the vibratory...
The modern technology demands the system to be light and reliable. However, with the conventional vibration control techniques it is difficult to keep the system light with all the damping mechanisms. This work deals with the Active Vibration Control (AVC) of cantilever beam using piezoelectric (PZT) transducers. Active control involves the use of sensors to sense the vibratory motion of the structure,...
An active vibration control approach of high-speed flexible robot with piezoelectric patch and strain gauges is presented by using discrete variable structure control with equivalent law. The experimental modal test method and modal truncation technique is applied to obtain the dynamic model of the system. The error state equations are obtained according to state equation and control requirements...
This paper studies the design and control problems of a class multiple DOF vibration isolation systems. For the controller design, the dynamics model of 6-RSS parallel mechanism can be represented in state-space form. Based on the model of the mechanism, two different kinds of feedback control strategies are applied and compared for the active vibration control of the 6-RSS parallel mechanism. One...
In this paper, researched the algorithmic mechanism of MIGA and NSGA-II deeply. Based on structure vibration energy and system control energy as multi-objective optimization functions of the structure vibration system, set up the optimal disposition mathematical model which referred to the system control gain and the sensors and actuators placements, quantities, lengths of the active vibration control...
Taking the piezoelectric flexible beam as the research object, this paper proposed a FXLMS algorithm based MIMO adaptive vibration control method to attenuate the oscillations of flexible structures at low frequency. By introducing the piezoelectric constitutive equations and analyzing the multi-channel adaptive filtered feedforward control algorithm and its FXLMS algorithm process, the model parameter...
In this paper, an adaptive active vibration control is proposed and implemented to a piezoelectric (PZT) stewart platform exhibiting nonlinearity. An adaptive controller based on filtered-x least mean square (LMS) algorithm is presented to attenuate vibration. The vibration control experiment is constructed using a digital signal processor (DSP) control system. Experimental results demonstrate that...
This paper mainly analyzes the method of the robust Hinfin control and does some experimental researches aiming at the piezoelectric smart flexible structure, under the background of the active vibration control of the aircraft structure. The analysis of the robust control method and the control process are given in this paper. On the basis of these, the structure and the technical parameter of the...
A positive position feedback controller is modified and a new active vibration control technique is developed. Unlike the conventional positive position feedback, the new controller separates the damping and stiffness control using two parallel first order and second order compensators. The second order compensator has a damping ratio as low as the damping of flexible structure to provide periodic...
Considerable attentions have been devoted recently to active vibration control using intelligent materials as sensors/actuators. This paper presents results on active control schemes for vibration suppression of flexible cantilever beam with bonded piezoelectric sensors and actuators. State equations which the generalized modal coordinates as variables are built. With the piezoelectric elements are...
This paper demonstrates an active vibration control system of flexible structures by using piezoelectric sensors and actuators. A set of vibration control equations, sensing equations and actuating equations are derived through using the modal theory for piezoelectric flexible structures, then the model is converted into the state space form. With recent developments in sensors/actuators technologies,...
Based on the linear quadratic Gauss (LQG) optimal control method, the paper introduces an effective procedure to suppress the vibration of flexible structures with the sensors/actuators are symmetrically collocated on both sides of the same position on the host structure. The model of a piezoelectric intelligent cantilever beam is built by the application of ANSYS software. The D-optimal design principle...
This paper is addressed to active vibration control of a simply-supported thin plate. In order to minimize the level of vibrations, the feedforward and feedback H2 controllers are applied via a piezoelectric actuator in the case of known and unknown disturbances respectively. The first five modes of plate between 0-500 Hz are considered as in-bandwidth modes. To evaluate the performance obtained the...
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