Numerical and Experimental Investigation of a Semi-Active Vibration Control System by Means of Vibration Energy Conversion

A vibration control concept based on vibration energy conversion and storage with respect to a serial-stiffness-switch system (4S) has previously been proposed. Here, we first present a rotational electromagnetic serial-stiffness-switch system as a novel practical vibration control system for experimental validation of the concept and, furthermore, an improved control strategy for higher vibration suppression performance is also proposed. The system consists of two spring-switch elements in series, where a parallel switch can block a spring. As an alternating mechanical switch, the experimental system uses two electromagnets with a shared armature. By connecting the armature to the rotating load or the base, the electromagnets decide which of the two spiral springs is blocked, while the other is active. A switching law based on the rotation velocity of the payload is used. Modelling and building of the experimental system were carried out. The corresponding experiment and simulation were executed and they matched well. These results prove that our serial-stiffness-switch system is capable of converting vibration energy and realizing vibration reduction under a forced harmonic disturbance. The effects of disturbance frequency, disturbance amplitude and sampling frequency on the system performance are shown as well. A position feedback control-based switching law is further put forward and experimentally verified to improve the repositioning accuracy of the disturbed system.

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Steady state response analysis for a switched stiffness vibration control system based on vibration energy conversion

Nonlinear Dynamics ◽

10.1007/s11071-020-06147-8 ◽

2021 ◽

Author(s):

Chaoqing Min ◽

Martin Dahlmann ◽

Thomas Sattel

Keyword(s):

Control System ◽

Steady State ◽

Energy Conversion ◽

Vibration Control ◽

Vibration Energy ◽

Response Analysis ◽

Steady State Response ◽

State Response

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An Experimental Study of Tendon Vibration Control System for Flexible Space Structures

13th Biennial Conference on Mechanical Vibration and Noise: Structural Vibration and Acoustics ◽

10.1115/detc1991-0190 ◽

1991 ◽

Author(s):

Yoshisada Murotsu ◽

Hiroshi Okubo ◽

Kei Senda

Keyword(s):

Mathematical Model ◽

Control System ◽

Vibration Control ◽

Transfer Functions ◽

Mimo Systems ◽

Experimental System ◽

Space Structures ◽

Flexible Beam ◽

Tendon Vibration ◽

Large Space

Abstract The idea of a tendon vibration control system for a beam-like flexible space structure has been proposed. To verify the feasibility of the concept, an experimental tendon control system has been constructed for the vibration control of a flexible beam simulating Large Space Structures (LSS). This paper discusses modeling, identification, actuator disposition, and controller design for the experimental system. First, a mathematical model of the whole system of the beam and tendon actuator is developed through a finite element method (FEM). Second, to obtain an accurate mathematical model for designing a controller, unknown characteristic parameters are estimated by using an output error method. The validity of the proposed identification scheme is demonstrated by good agreement between the transfer functions of the experimental system and an identified model. Then, disposition of actuators is discussed by using the modal cost analysis. Finally, controllers are designed for SISO and MIMO systems. The feasibility of the proposed controller is verified through numerical simulation and hardware experiments.

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Self-Powered Active Vibration Control With Continuous Control Input: Application to a Cab Suspension of a Heavy Duty Truck

Volume 6: International Symposium on Motion and Vibration Control ◽

10.1115/detc99/movic-8404 ◽

1999 ◽

Author(s):

Kimihiko Nakano ◽

Yoshihiro Suda ◽

Shigeyuki Nakadai

Keyword(s):

Control System ◽

Vibration Control ◽

Active Vibration Control ◽

The Self ◽

Vibration Energy ◽

Heavy Duty ◽

Heavy Duty Truck ◽

Active Vibration ◽

Self Powered ◽

Isolation Performance

Abstract Active vibration control using regenerated vibration energy, i.e., self-powered active control, is proposed. In the self-powered active control system, vibration energy is regenerated by an electric generator, which is called an energy regenerative damper, and is stored in the condenser. An actuator achieves active vibration control using the energy stored in the condenser. The variable-value resistance whose value can be controlled by a computer is utilized to control output force of the actuator. The authors examine the performance of the self-powered active vibration control on experiments and propose to apply this system to cab suspensions of a heavy duty truck. Through experiments, it is shown that the self-powered active vibration control system has better isolation performance than a semi-active and a passive control system. Numerical simulations demonstrate better isolation performance of the self-powered active vibration control in cab suspensions of a heavy duty truck.

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Influence of Hysteresis on the Vibration Control of a Smart Beam with a Piezoelectric Actuator by the Bouc–Wen Model

Shock and Vibration ◽

10.1155/2020/8138726 ◽

2020 ◽

Vol 2020 ◽

pp. 1-11 ◽

Cited By ~ 1

Author(s):

Ting Zhang

Keyword(s):

Control System ◽

Vibration Control ◽

Vibration Suppression ◽

Numerical Range ◽

Reference Model ◽

Smart Structure ◽

Hysteresis Model ◽

Control Effect ◽

Smart Beam ◽

The Stability

The hysteresis property in a smart structure has attracted much attention from researchers for several decades. Hysteresis not only affects the response precision of the smart structure but also threatens the stability of the system. This paper focuses on how the hysteresis property influences the control effect of vibration suppression for a smart beam. Furthermore, the Bouc–Wen model is adopted to describe the hysteresis property of a smart beam and the hysteresis parameters of the hysteresis model are identified with a genetic algorithm. Based on the identification results, the hysteresis model is validated to represent the hysteresis property of the smart beam. Based on the hysteresis model, model reference adaptive control is designed to explore the influence of hysteresis on the vibration control of the smart beam. With some simulations and experiments, it is found that the vibration control effect is influenced when the hysteresis item changes. The vibration control effect will be improved when the hysteresis coefficient in the Bouc–Wen model, as the expected objective model of the adaptive reference model, is within a proper numerical range where the control system is stable. Furthermore, when the time delay is considered in the closed-loop control system, the principle of the hysteresis influence is different. The results indicate that the hysteresis property affects not only the control effect but also the stability of the control system for a smart cantilever beam.

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