俯冲状态炮击后座力对直升机运动姿态的影响

俯冲状态武器发射是直升机的典型攻击状态。基于工程估算的目的，假定俯冲射击过程为匀加速度运动，建立了直升机炮击扰动运动方程；在射击点配平的基础上利用变步长的四阶龙格－库塔法对方程求解，获得了炮击后座力对直升机运动姿态的影响。实例计算包括武器对称单发，对连续多发与非对称连续多发发射。计算结果表明该方法合理可行。

Effect of Gun Recoil on Helicopter Attitudes of Dive Status

The weapon shooting of dive status is typical for a military helicopter. In the case of assuming that the acceleration is constant during the dive firing process, a mathematical model is established for calculating the effect of gun recoil on helicopter attitudes. Meanwhile, in order to improve overall precision of the established model, some measures, such as nonuniform dynamic inflow model, the same comprehensive analysis for dynamics of tail rotor as mail rotor, and so on, are also taken. Based on the trim calculation of shooting point, the equations are solved by using the fourth order Runge kutta method. Numerical examples include symmetric single shooting, continuous shooting and non symmetric continuous shooting. The effectiveness and precision of this approach are verified by the flight test results.