大尺寸缩比自由飞模型惯性矩测量与调整方法

给出了双线摆法测大尺寸缩比自由飞试验模型惯性矩的方法和流程,并根据飞机类模型的惯性矩特点,提出了大尺寸缩比自由飞试验模型惯性矩调整所需的配重计算方法.双线摆法测量原理简单,不需要复杂的测量设备,具有较好的工程实用性.应用实例证明,模型飞机调整后的惯性矩与目标状态符合较好,测量精度满足工程应用要求.

A mass moment of inertia measuring and adjustment method for free-flight models

Based on the theory of bifilar pendulum,a method for measuring the mass moment of inertia of the free-flight models was proposed in this paper,especially for the scaled demonstrators with large sizes.The counterweight calculation procedure for the mass moment of inertia adjustment was also established,where the characteristics of the mass moment of inertia distribution of the aircraft was adopted.The advantage of the bifilar pendulum method includes:simple measuring principle,easy operation,and neither expensive nor complicated device needed during the measuring progress.The application example indicates that the experiment result coincides well with the target value of the mass moment of inertia,which confirms that the method proposed in this paper is suitable for engineering application.