用扭摆法测量导弹惯性积的误差分析

Error Analysis for Testing Missile's Product of Inertia Using Torsion Pendulum

文中描述了通过扭摆法测量导弹六种不同状态的转动惯量计算惯性积的方法,分析了惯性主轴夹角测量误差与试件长细比、测试倾斜角的关系,并对一圆柱形标准样件的测量误差进行了分析,给出了最优测量倾角,并得出了当长细比大于5后,惯性主轴夹角的测量误差基本稳定的结论。

This paper introduces a method of determining missile's product of inertia by a series of moment of inertia measurements with the missile oriented in six different positions in addition to indicates that error for testing principle axis orientation is related with slenderness ratio and sloping angle.Measurement error for a standard cylinder specimen is analyzed,and optimal sloping angle is calculated.The example indicates that measurement error for principle axis orientation is next to changeless when missile's slenderness ratio is greater than 5.