气动中心超前的对偶问题

为提高导弹的气动力特性,设计导弹的气动外形时可能出现气动中心位于重心之前的现象。本文应用状态空间分析法,研究气动中心超前的对偶问题,据此获得导弹无恢复力矩时关于飞行状态的完全可控和可测的条件。在状态反馈下,使用极点配置法导出了气动中心超前的极限值,即放宽静稳定性的准则。列举了计算结果。

DUALITY PROBLEM OF AERODYNAMIC CENTER IN FRONT

In order to improve aerodynamic performance of missiles,there can be the phenomenon that aerodynamic center is in front of thecenter of gravity in the design of aerodynamic configuration. In this paper by applying the state-space analysis the duality problem of the aerodynamic center in front is studied. According to principle of duality, the conditions of complete controllability and observability concerning, flight state are obtained when the missile has no aerodynamic restoringmoment .By using the state feedback and pole assignment the limit value of aerodynamic center in front are derlyed,i.e.the criterion of reducing static stability. As an example, the results of calculation are given.