|Table of Contents|

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


Research Field:
Publishing date:


Measurement of Moment of Inertia Based on Real-time Computing Damping Ratio
LI Hui-pengTANG Wen-yanZHANG Chun-fuWANG Jun
School of Electrical Engineering and Automation,Harbin Institute of Technology,Harbin 150001,China
moment of inertia damping ratio photoelectricity timing method torsion pendulum
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.


[1] 张广玉, 陈志刚, 赵学增. 对接动力学仿真台质量 惯量模拟件研究[ J]. 南京理工大学学报, 2005, 29 ( 5) : 547- 550.
[2] Lyons D P. Obta in ing optim a l resu lts w ith filar pendulum s form om ent o f inertia m easurem ents[ N ]. SAWE Paper, 2002- 07( 323).
[3] 吴斌, 张波, 许苏海. 导弹质量特性测量装置设计 [ J]. 上海航天, 2001( 3): 41- 44.
[4] Boyn ton R. A new h igh accuracy instrum ent form easur ing m om ent o f inertia and center of g rav ity [ N ]. SAWE Paper, 1988( 1827).
[5] Cooper J E. Ex tending the logar ithm ic decrementm ethod to ana ly ze two deg ree o f freedom transient responses [ J]. M echanical System s and S igna l Processing, 1996, 10( 4): 497- 500.
[6] 方子良, 王军辉, 高骏. 动力减振器最佳参数的确 定方法[ J]. 南京理工大学学报, 2002, 26( 3): 334 - 336.
[7] 陈奎孚, 张森文. 半功率法估计阻尼的一种改进 [ J]. 振动工程学报, 2002, 15( 2) : 151- 155. 475


Last Update: 2012-12-19