新型扭转准零刚度的振动角度传感系统

发布时间：2018-01-09 11:40

本文关键词：新型扭转准零刚度的振动角度传感系统　出处：《西安交通大学学报》2017年08期 　论文类型：期刊论文

【摘要】：针对工程实践中绝对振动角度难以直接测量的问题,提出了一种带有凸轮滚珠装置的新型扭转准零刚度的振动角度传感系统。依据传感系统的结构特点,分析了其测量机理;在静力学分析的基础上,建立了传感系统的非线性动力学模型;采用谐波平衡法研究了压簧预压缩量、阻尼比和被测信号幅值对动态测量性能的影响。数值仿真结果表明,即使压簧预压缩量有4%的误差,对于相应线性系统固有频率0.3倍频以上的小幅振动,实时测量误差仍然可以控制在3%以内。该系统可以为诸多振动控制问题提供一个方便、廉价、直接、精确的扭振状态测量方案。
[Abstract]:In order to solve the problem that the absolute vibration angle is difficult to be measured directly in engineering practice, a new vibration angle sensing system with torsional quasi zero stiffness with cam ball device is proposed, which is based on the structural characteristics of the sensing system. The measuring mechanism is analyzed. Based on the static analysis, the nonlinear dynamic model of the sensing system is established. The effects of pre-compression shrinkage, damping ratio and amplitude of measured signal on the dynamic measurement performance are studied by using harmonic balance method. The numerical simulation results show that even the pre-compression shrinkage of the spring is 4% error. The real-time measurement error can still be controlled within 3% for the small vibration of the corresponding linear system whose natural frequency is more than 0. 3 times. The system can provide a convenient, cheap and direct method for many vibration control problems. Accurate measurement scheme of torsional vibration state.
【作者单位】：重庆大学汽车工程学院;中国汽车工程研究院股份有限公司汽车噪声振动和安全技术国家重点实验室;
【基金】：国家高技术研究发展计划资助项目(2012AA111803) 国家重点实验室开放基金资助项目(NVHSKL-201502)
【分类号】：TP212
【正文快照】： 动力学系统的状态测量是系统辨识[1-2]、振动控制[3-4]等诸多工程实践的关键环节。大量的振动平台(车载光学平台、船用精密仪器、无人机平台等)需要依赖于实时准确的绝对状态反馈才能获得良好的主动振动控制效果[5-7]。在动力学系统中通常采用加速度计/陀螺仪来测量绝对加速度

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