基于阻尼比实时算法的转动惯量测量研究  

Measurement of Moment of Inertia Based on Real-time Computing Damping Ratio

作　　者：李慧鹏[1] 唐文彦[1] 张春富[1] 王军[1] 

机构地区：[1]哈尔滨工业大学电气工程学院,黑龙江哈尔滨150001

出　　处：《南京理工大学学报》2008年第4期472-475,共4页Journal of Nanjing University of Science and Technology

基　　金：哈尔滨工业大学优秀青年教师培养计划资助项目(HITQNJS.2007.022)

摘　　要：为了提高扭摆动法转动惯量测量精度和测量稳定性,从理论上证明了采用光电计时法测量扭摆动周期时,测量位置偏差会引起周期测量误差,而利用多次周期平均的计算方法不会减小测量误差。提出了一种利用相邻扭摆周期面积比实时计算阻尼比的方法,并证明了该方法的可行性。实验结果表明:利用该文提出的方法测得转动惯量的标准差比光电计时法减小一个数量级。In order to enhance the accuracy and the stability for measuring moment of inertia through the torsion pendulum method, it is demonstrated in principle the measuring position error can cause the period measurement error in the measurement of the period of torsion pendulum using the photoelectricity timing method, but the measurement error can not be reduced by multi-average. A method of real-time computing damping ratio using the ratio of adjacent area of period is presented, and the feasibility of this method is demonstrated by theoretical analysis. The experimental results show that the standard deviation of moment of inertia with the method introduced here decreases an order of magnitude than that with photoelectricity timing method.

关 键 词：转动惯量 阻尼比 光电计时法 扭摆 

分 类 号：TJ760.6[兵器科学与技术—武器系统与运用工程]