Control of micro-vibration generation using Hexapod platform based on adaptive harmonic cancellation
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摘要: 针对空间微振动环境模拟的需求,以Hexapod平台为对象,进行正弦振动激励控制的研究。当Hexapod平台工作在共振频段时,其输出的振动信号中因含有谐波成分而产生了显著的控制误差。为此,提出了一种自适应谐波消除算法。该算法以LMS滤波器为基础,将与谐波同频率的正弦信号和余弦信号作为滤波器的基底信号,将平台实际的输出响应作为滤波器的误差信号,以此实现谐波分量的自适应消除。将基于该算法的控制回路引入传统的控制器,进行了共振频段的单输入单输出和多输入多输出的微振动激励试验,结果表明,该算法可有效地消除谐波失真,大幅提高了Hexapod平台在共振频段的控制精度。
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关键词:
- 振动激励 /
- Hexapod 平台 /
- 自适应控制 /
- 共振 /
- 谐波消除
Abstract: A Hexapod platform driven by voice coil motors is used to simulate the micro-vibration environment in space. The response signal of the Hexapod platform contains harmonics when it works at resonance frequencies, resulting in a significant error between the actual output and the desired output. To reduce the harmonic distortion and improve the control performance of the Hexapod platform, an adaptive harmonic cancellation (AHC) algorithm based on the LMS filter is developed. The reference signals of the LMS filter are a sine signal and a cosine signal with the same frequency of the harmonics. Meanwhile, the output signal is directly used as the error signal of the LMS filter. Experimental results show that the proposed approach can efficiently eliminate the harmonic distortion and greatly enhance the control accuracy in both SISO and MIMO cases.-
Keywords:
- vibration excitation /
- Hexapod platform /
- adaptive control /
- resonance /
- harmonic cancellation
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[1] 王红娟, 王炜, 王欣, 等. 航天器微振动对空间相机像质的影响[J]. 光子学报, 2013, 42(10):1212 Wang Hongjuan, Wang Wei, Wang Xin, et al. Space camera image degradation induced by satellite micro-vibration[J]. Acta Photonica Sinica, 2013, 42(10):1212 [2] 次永伟, 邱大芦, 付乐平, 等. 航天器振动试验控制技术进展[J]. 动力学与控制学报, 2014, 12(3):193 Ci Yongwei, Qiu Dalu, Fu Leping, et al. Progress in spacecraft vibration testing control technology[J]. Journal of Dynamics and Vibration, 2014, 12(3):193 [3] Stewart D. A platform with six degrees of freedom[J]. Proceedings of the Institution of Mechanical Engineers, 1965, 180(1):371-386
[4] Taranti C G. A computationally efficient algorithm for disturbance cancellation to meet the requirements for optical payloads in satellites[D]. CA:Research Office, Naval Postgraduate School, 2001
[5] Foshage G K, Davis T, Sullivan J M, et al. Hybrid active/passive actuator for spacecraft vibration isolation and suppression[C]//SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation. Denver, 1996
[6] Hanieh A A. A stiff and soft stewart platforms for active damping and active isolation of vibrations[C]//8th International Conference on New Actuators. Bremen, 2002:254-257
[7] Ewing C M. The advanced guided weapon tested(AGWT) at the Air Force Research Laboratory Munitions Directorate[C]//AIAA Modeling and Simulation Technologies Conference. Chicago, 2009
[8] 赵勇. 液压振动台高精度正弦振动的控制策略研究[D]. 哈尔滨:哈尔滨工业大学, 2009 [9] 沈刚. 三自由度电液振动台时域波形复现控制策略研究[D]. 哈尔滨:哈尔滨工业大学, 2011 [10] Wang H. Multiple-degree-of-freedom sinusoidal vibration generation based on a Hexapod platform[J]. Journal of Systems and Control Engineering, 2015, 229(2):139-148
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