A Two-DOF Active-Passive Hybrid Vibration Isolator Based on Multi-Line Spectrum Adaptive Control

In order to effectively control the low-frequency vibration of ship machinery, based on the improved multi-line spectrum adaptive control algorithm, a two-degree-of-freedom (two-DOF) active-passive hybrid vibration isolator composed of an electromagnetic actuator, rubber spring, and the hydraulic de...

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Veröffentlicht in:Machines (Basel) Jg. 10; H. 10; S. 825
Hauptverfasser: Yang, Qingchao, Ma, Zhaozhao, Zhou, Ruiping
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Basel MDPI AG 01.10.2022
Schlagworte:
Acoustics
active-passive hybrid vibration isolator
Actuators
Adaptive algorithms
Adaptive control
Algorithms
Analysis
Control algorithms
Control theory
Controllers
Damping
Degrees of freedom
Design
Diesel engines
Dynamic models
Electromagnetism
IWPHB-FxLMS algorithm
low-frequency vibration
Mean square values
Springs (elastic)
Vibration
Vibration analysis
Vibration control
Vibration isolators
ISSN:2075-1702, 2075-1702
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Zusammenfassung:In order to effectively control the low-frequency vibration of ship machinery, based on the improved multi-line spectrum adaptive control algorithm, a two-degree-of-freedom (two-DOF) active-passive hybrid vibration isolator composed of an electromagnetic actuator, rubber spring, and the hydraulic device is proposed. The dynamic model of the two-DOF vibration isolation system is established and the main control force demand of the vibration isolation system at different damping forces is analyzed. By introducing the improved wavelet packet decomposition algorithm with the Hartley block least mean square algorithm to the filter-x least mean square (FxLMS) algorithm, an improved wavelet packet Hartley block filter-x least mean square (IWPHB-FxLMS) algorithm is established. The experimental results show that the IWPHB-FxLMS algorithm has better control performance. Compared with the traditional FxLMS algorithm, the IWPHB-FxLMS control algorithm improves the convergence speed by 91.7% and the line spectrum power spectrum attenuation by 58.1%. The active-passive hybrid vibration isolator is based on multi-line spectrum adaptive control and can achieve good control effects under the excitation of multi-frequency line spectrum and constant frequency line spectrum.
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ISSN:2075-1702
2075-1702
DOI:10.3390/machines10100825