一种用于误差通道预辨识的气动冲击锤特性分析

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摘要本文针对船舶机械设备主动减振系统的误差通道预辨识问题，研制了一种气动冲击锤作为激励力源。为了解气锤的特性，对其开展仿真和试验研究。首先通过建立气锤气体做功过程的热-机耦合模型和锤头冲击过程的动力学模型，得到锤头冲击速度、冲击力及冲击时间之间的数学物理关系，对比分析活塞组件工作过程的仿真和试验测试结果；然后探讨复位弹簧刚度、活塞与气缸壁之间的粘性阻尼、气缸内的死区容积等结构动力学参数对锤头冲击速度的影响。最后对气锤冲击力的仿真和测试结果进行对比分析，并应用气锤对弹性结构进行传递函数测试，与传统力锤激励的测试结果进行比较，验证气锤对结构动力学特性参数测试的可行性和有效性。

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	李锋1
	杨铁军1
	吴磊2
	徐阳2
	黎文科1
	李新辉1
	朱明刚1

关键词 ：主动减振, 误差通道预辨识, 气动冲击锤, 仿真和试验研究

Abstract：A pneumatic impact hammer was developed as force excitation for the secondary path pre-identifying of an active vibration control system for marine machine. Simulation and experimental investigations were carried out to understand its characteristics. Firstly, the thermal-mechanic coupling model of working process and impacting model of the pneumatic hammer are derived and the relationship of impact velocity, impact force and duration time are derived. Simulation and measurements of piston group working process are compared and analyzed. Then the effects of spring stiffness, viscous damper of piston and dead volume on the hammer impact velocity are discussed. Finally, impact forces from calculation and measuring are compared, the comparison of transfer functions of a flexible structure excited by the pneumatic hammer and a traditional hammer is also made. The feasibility and effectiveness of the developed pneumatic hammer are verified.

Key words： Active vibration control Secondary path pre-identifying Pneumatic impact hammer Simulation and experimental investigation

收稿日期: 2023-02-13 出版日期: 2024-03-15

引用本文:

李锋1，杨铁军1，吴磊2，徐阳2，黎文科1，李新辉1，朱明刚1. 一种用于误差通道预辨识的气动冲击锤特性分析[J]. 振动与冲击, 2024, 43(5): 166-172.
LI Feng1,YANG Tiejun1,WU Lei2,XU Yang2,LI Wenke1,LI Xinhui1,ZHU Minggang1. Characteristics analysis of a pneumatic impact hammer used for secondary path pre-identification. JOURNAL OF VIBRATION AND SHOCK, 2024, 43(5): 166-172.

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http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2024/V43/I5/166

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