用于水下航行器宽带振动控制的新型环形压电隔振器:概念、分析与验证

IF 8.9 1区 工程技术 Q1 ENGINEERING, MECHANICAL
Ziyu Shen , Liang Wang , Rui Qi , Xiaoming Geng , Haoren Feng , Chunsheng Zhao
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引用次数: 0

摘要

水下航行器(uuv)对于海洋防御至关重要,而噪声和振动干扰经常危及其稳定性和隐身性。为满足uuv小型推进舱内高精度、高效率、宽频带、多向的振动控制要求,提出了一种基于分频增益控制的环形主动隔振器。首先,设计了基于压电作动器的隔振器结构,使其同时满足径向承载和隔振;然后,建立了包含压电作动器动力学的环形主动隔振器的数学模型,提出了针对宽带干扰的分段主动控制方法(重点是分段控制增益),克服了有效控制宽带的困难。最后,制作并组装了样机,验证了环形压电隔振器控制任意径向扰动的有效性,并通过宽带振动控制实验探讨了分段振动控制方法的可行性。结果表明,对于单向干扰(单径向),在谐振频率处幅度衰减最大,达到91%,在非谐振频率处控制性能也很好,残余干扰低至0.03 g。在旋转方向(结合x和y径向方向)耦合的宽带干扰得到有效控制,实现88% (x)和48% (y)的减少。采用分段振动控制方法的环形压电隔振器的研究,可为uuv的宽带振动控制提供参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

A novel ring piezoelectric vibration isolator for wideband vibration control of underwater vehicles: Concept, analysis and verification

A novel ring piezoelectric vibration isolator for wideband vibration control of underwater vehicles: Concept, analysis and verification
Underwater vehicles (UUVs) are essential for marine defenses, while noise and vibration disturbances frequently jeopardize their stability and stealth. To meet the high-precision, high-efficiency, wideband and multidirectional vibration control requirements in the small propulsion compartment of UUVs, a novel ring active vibration isolator with frequency-segmented gain control is proposed in this study. Firstly, the structure of the vibration isolator based on piezoelectric actuators is designed to meet radial bearing and vibration isolation simultaneously. Then, a mathematical model of the ring active vibration isolator including the piezoelectric actuator dynamics is developed, and the segmented active control method (focusing on segmented control gain) for wideband disturbances is proposed to overcome the difficulties of effective wideband control. Finally, the prototype is manufactured and assembled to verify the efficiency of the ring piezoelectric vibration isolator in controlling arbitrary radial disturbances, and the wideband vibration control experiments are used to explore the feasibility of the segmented vibration control method. The results show that, for unidirectional disturbances (single radial direction), the greatest amplitude attenuation reaches 91 % at resonant frequencies, and the control performance is also excellent in non-resonant frequencies with residual disturbance as low as 0.03 g. Wideband disturbances coupled in the rotational direction (combined x and y radial directions) are effectively controlled, achieving 88 % (x) and 48 % (y) reductions. This study on the ring piezoelectric vibration isolator with the segmented vibration control method can be used as a reference for wideband vibration control of UUVs.
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来源期刊
Mechanical Systems and Signal Processing
Mechanical Systems and Signal Processing 工程技术-工程:机械
CiteScore
14.80
自引率
13.10%
发文量
1183
审稿时长
5.4 months
期刊介绍: Journal Name: Mechanical Systems and Signal Processing (MSSP) Interdisciplinary Focus: Mechanical, Aerospace, and Civil Engineering Purpose:Reporting scientific advancements of the highest quality Arising from new techniques in sensing, instrumentation, signal processing, modelling, and control of dynamic systems
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