天基反航母武器再入轨迹优化与制导研究

发布时间：2018-10-12 17:26

【摘要】：本文针对天基反航母武器的轨迹优化及制导方法开展研究。以天基反航母武器到达航母初始位置上方设定位置的时间最短为性能指标,采用高斯伪谱法对天基反航母武器的再入飞行阶段进行轨迹优化,这样可以减少敌方的预警时间,实施快速突袭。考虑到再入飞行的中后段,特别是在对流层,天基反航母武器所经历的飞行环境变化大,气动升力系数可能会出现不可忽视的摄动,导致飞行过程中出现较大的控制偏差。文中提出了一种考虑灵敏度的轨迹优化算法,把终端状态值对摄动系数的灵敏度加入到目标函数中,并与时间最省指标通过罚函数法结合到一起形成最终的优化目标。在对原来最优性能指标影响很小的情况下,可以有效减少因气动升力系数的摄动而出现的落点偏差。这对进入末端制导阶段时导引头迅速捕获目标,确保精确击中目标具有重要意义。针对天基反航母武器的末端制导阶段,推导出了天基反航母武器的制导指令信号。由设计出来的制导律,对天基反航母武器末端制导阶段在MATLAB上进行仿真,从仿真结果可以看出,由于天基反航母武器末端制导阶段的初始飞行速度很高,一般是三倍以上音速,并且距离航空母舰并不十分远,所以即使航空母舰以最高航速航行也难以躲避打击,并且文中设计的末制导律涉及到的目标信息容易在线测量,容易为制导计算机实现。
[Abstract]:In this paper, the trajectory optimization and guidance method of space-based anti-aircraft carrier weapon are studied. Taking the shortest time for space-based anti-aircraft carrier weapons to reach the set position above the initial position of the aircraft carrier, Gao Si pseudospectral method is used to optimize the trajectory of space-based anti-aircraft carrier weapons at the re-entry flight stage, so that the warning time of the enemy can be reduced. Carry out a quick raid. In view of the large changes in the flight environment experienced by space-based anti-aircraft carrier weapons especially in the troposphere the aerodynamic lift coefficient may appear unneglectable perturbation resulting in a large control deviation during flight. In this paper, a trajectory optimization algorithm considering sensitivity is proposed. The sensitivity of terminal state value to perturbation coefficient is added to the objective function, and the time saving index is combined with the penalty function method to form the final optimization target. Under the condition of little influence on the original optimal performance index, the fall point deviation caused by the perturbation of the aerodynamic lift coefficient can be effectively reduced. It is of great significance for the seeker to catch the target quickly and to make sure to hit the target accurately when it enters the terminal guidance stage. According to the terminal guidance stage of space-based anti-aircraft carrier weapon, the guidance command signal of space-based anti-aircraft carrier weapon is derived. Based on the designed guidance law, the terminal guidance phase of space-based anti-aircraft carrier weapons is simulated on MATLAB. From the simulation results, it can be seen that the initial flight speed of the terminal guidance phase of space-based anti-aircraft carrier weapons is very high, which is generally more than three times the speed of sound. And the distance from the aircraft carrier is not very far, so even if the aircraft carrier navigates at the highest speed, it is difficult to avoid the attack, and the target information involved in the terminal guidance law designed in this paper is easy to be measured online and easy to be realized by the guidance computer.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：V448.2

【参考文献】