对三轴振动试验系统进行分析,研究了多输入多输出功率谱复现控制算法。利用 频响函数估计法对系统进行辨识。针对系统频响矩阵为长方阵并出现奇异点的情况,采用奇异值截断法保证算法的稳定性,并运用迭代控制算法修正驱动谱提高振动控制的精度。通过三轴向振动台与集成该算法的多输入多输出振动控制器进行三轴向振动试验。实验结果表明:基于 频响函数估计法修正迭代控制算法进行振动试验对功率谱的复现具有较好的精度和工程实用性。
Abstract
Through analyzing a three-axis vibration test system, the multi-input multi-output (MIMO) power spectrum emersion control algorithm was studied. frequency response function (FRF) estimation method was used to identify the system. Aiming at that the system’s frequency response matrix was rectangular and had singular points, the singular value truncation method was adopted to ensure the stability of the algorithm, the iterative control algorithm was adopted to modify drive spectrum and improve the accuracy of vibration control. Three-axis vibration tests were conducted with a three-axis vibration table and a MIMO vibration controller integrating the above algorithm. Results showed that the modified iterative control algorithm based on FRF estimation method has a good accuracy and an engineering practicability for the repetition of power spectrum.
关键词
三轴振动 /
奇异值截断 /
驱动谱 /
修正迭代控制
{{custom_keyword}} /
Key words
three-axis vibration /
singular value truncation /
drive spectrum /
modified iterative control
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] Chong K S, Gwee B H. A 16-channel low-power nonuniform spaced filter bank core for digital hearing aids [J]. IEEE Trans. On Circuits and Systems II: Express Briefs, 2006, 53(9):853-857.
[2] Sloane E A. Vibration testing environment or apparatus [J]. Sound and Vibration Bulletin, 1973, 2: 165-182.
[3] David O. Smallwood. A random vibration control system for testing a single test item with multiple inputs [C]. 400 Commonwealth Drive, Warrendale, PA 15096-0001, United States, 1982:175-181.
[4] Tustin W. Fifth edition of Harris' shock and vibration handbook reviewed [J]. Test Engineering and Management, 2002, 64(1): 30.
[5] 栾强利. 液压振动实验控制系统关键技术研究[D]. 浙江大学,2015.
LUAN Qiang-li. Research of Key Technologies of the Control System in Hydraulic Vibration Tests [D]. Zhejiang University, 2015.
[6] 吴吉平. 多输入多输出频域正交多项式模态参数识别方法[D]. 中南大学, 2002.
WU Ji-ping. The MIMO System Modal Parameter Identification Methods Based on Frequency Domain Orthogonal Polynomial Algorithm [D]. Central South University, 2002.
[7] 刘良玉. 多输入多输出频域模型参数识别[D]. 西安电子科技大学, 2013.
LIU Liang-yu. The Parameter Identification of Frequency Domain Modal under Multiple Input and Output [D]. Xidian University, 2013.
[8] 杜永昌, 管迪华. 多输入多输出频域模态识别算法的探讨[J]. 清华大学学报(自然科学版), 1997, (11): 63-66.
DU Yong-chang, GUAN Di-hua. Study of Multiple Input Multiple output Frequency Domain Parameter Estimation Method [J]. (Journal of Tsinghua University (Science and Technology) , 1997, (11): 63-66.
[9] 朱银龙. 多输入多输出正弦振动试验控制系统的研究[D]. 南京航空航天大学, 2007.
ZHU Yin-long. Research on Sinusoidal Vibration Test Control System of Multiple-input and Multiple-output [D]. Nanjing University of Aeronautics and Astronautics, 2007.
[10] 韩军, 鲍明, 倪宏伟. 进化规划在多振动台随机振动控制中的应用[J]. 中国机械工程, 2003, (13): 26-29.
HAN Jun, BAO Ming, NI Hong-wei. An Improved Method Based on Evolutionary Programming for Multi-shaker Random Vibration Control [J]. China Mechanical Engineering, 2003, (13): 26-29.
[11] 范锐. 轮耦合道路模拟台波形再现控制算法的研究[D]. 哈尔滨工业大学, 2013.
FAN Rui. Control Strategy of Tire-coupled Road Simulator for Waveform Replication [D]. Harbin Institute of Technology, 2013.
{{custom_fnGroup.title_cn}}
脚注
{{custom_fn.content}}