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

Chaoqing Min, Martin Dahlmann and Thomas Sattel
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Chaoqing Min: State Key Laboratory for Manufacturing System Engineering, Xi’an Jiaotong University, Xi’an 710054, China
Martin Dahlmann: Mechatronics Group, Department of Mechanical Engineering, Technische Universität Ilmenau, 98693 Ilmenau, Germany
Thomas Sattel: Mechatronics Group, Department of Mechanical Engineering, Technische Universität Ilmenau, 98693 Ilmenau, Germany

Energies, 2021, vol. 14, issue 16, 1-19

Abstract: 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.

Keywords: semi-active vibration control; energy conversion; serial springs; mechanical switch; variable structure (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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