缩比模型飞机及其飞控系统与原型机的相似关系

Similarity Relationships Between Scaled-Model Aircraft with Its Flight Control System and Prototype Aircraft

从量纲理论出发 ,简单地导出了原型飞机与缩比模型飞机各物理量的相似比例关系 ,说明了在构成缩比模型飞机数学方程时应注意的问题。用所得的方法 ,求取了现代战斗机缩比模型飞机的数学方程 ,并对其进行了仿真验证。仿真结果表明 ,该方法是正确的。此外 ,还推导了缩比模型飞机飞行控制系统动态环节相关特征量的相似比例关系 。

Based on the dimension theory, this paper deduces the proportions between a prototype aircraft and a scaled model aircraft, and then interprets the issues building up the equations of the scaled model airplane. Next it develops the equations of the scaled model flight for the modern advanced fighter by this method. After some numeric simulations, the results are proved to be correct. Lastly, the paper discusses the proportions for the dynamic components in the flight control system, and highlights the issues as designing the flight control system in the scaled model flight.