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中北大学仪器科学与动态测试教育部重点实验室
纸质出版:2008
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侯文. 大型弹箭及航天器转动惯量测量方法研究[J]. 中北大学学报(自然科学版), 2008,29(6):505-509.
侯文. Research on Measurement Method for Moment of Inertia of Large-Scale Projectiles and Spacecrafts[J]. 2008, 29(6): 505-509.
为了探索提高大型弹箭及航天器转动惯量测量精度的途径
对当前国内外所采用的扭摆法、复摆法和三线摆法等惯量测量原理及它们的测量精度和误差来源进行了总结、对比和分析.研究表明:由于被测体质量较大且往往具有翼或舵等结构
因此其转动惯量测量误差主要来源于摩擦阻力和空气阻力
改进测量电路及传感器无法减小这两种阻力对测量的影响;二阶线性系统形式的扭摆动力学模型无法涵盖各种阻力对于测量的影响;采用真空舱和空气轴承可以减小空气阻力和摩擦阻力
但技术难度和测量成本较高.
To investigate the approach to enhancing the measurement precision of moment of inertia of large-scale projectiles and spacecrafts
three measurement methods presently used home and abroad
torsion pendulum method
compound pendulum method
and three-string pendulum method
were reviewed.The precisions and error resources of the methods were summarized and compared.Results show that the friction resistance and air-drag are the major error resources for wings and rudders structure and large mass of tested object.There is little contribution to reduce the errors from friction resistance and air-drag by improving the sensors and electronic circuits.The friction resistance and air-drag can not be adequately represented by describing the torsion pendulum as a two-order linear system.With the expensive cost and complicated technology
the vacuum cabin and gas bearing are only effective ways to reduce the errors caused by the friction resistance and air-drag.
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