Simulation and flight test of trajectory in terminal guidance
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摘要: 提出了战斗机完成制导装置末端制导阶段飞行轨迹的仿真和试飞方法.末端制导阶段的飞行轨迹要求进入段尽可能减小高度损失,并在俯冲段满足精确的轨迹跟踪.采用6自由度全量非线性方程,考虑纵向和横航向运动的相互耦合关系,通过对飞机的高速度、大俯冲角、大落差飞行全过程进行仿真研究,分析了3种利用滚转操纵进入俯冲的情况,获得了满足高精度飞行轨迹的操纵方案,即在进入段,先操纵副翼使滚转角接近180°,拉杆使俯冲角满足轨迹要求后,再反向操纵副翼使飞机正飞进入俯冲.通过飞行试验验证了方案的合理性和有效性.研究表明:该方法在保证飞行安全的前提下,提高了飞行轨迹精度和试飞效率.Abstract: A method of simulation and flight test for seeker-s particular trajectory in terminal guidance was presented. In the flight simulation of trajectory in terminal guidance, height decrease by the entry maneuver need to be achievably small, and precision request of tracking in the diving flight phase should be satisfied. A set of nonlinear 6-DOF equations was used, in which the coupling between longitude and lateral motion was considered. To keep precise tracking in the diving and flight security with large magnitude of flight speed, dive angle, height altering, 3 types of stick roll control were analyzed, and control scheme satisfies request of precision was given. In the entry phase, bank angle was firstly changed to 180°. After satisfying dive angle of the trajectory by elevator control, bank angle returned to 0°. Flight test project was accomplished to verify the reliability and availability of the control scheme. Results of flight simulation and test show that the method presented could improve flight test efficiency and the precision of aircraft tracking particular trajectory with guaranteed flight security.
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Key words:
- flight trajectory /
- flight simulation /
- flight test
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