摘要
研究飞行制导优化问题,针对一种旋转制导炮弹,为了保证弹道跟踪的精确性,提出设计输出指令为加速度值的高性能非线性制导律,并采用过载控制方案设计了制导控制系统。选择弹道上的参考点,利用GPS得到的制导弹药飞行位置及速度信息,得出一种非线性过载制导信号控制飞行器跟踪曲线弹道。采用非线性过载制导指令作为制导外环,加速度自动驾驶仪作为控制内环,根据变结构控制理论设计了自动驾驶仪。对设计的制导控制系统进行了数字仿真。仿真结果表明,非线性制导律及加速度自动驾驶仪能够保证制导弹药准确地跟踪设计轨迹,使跟踪误差处于合理范围内。
A nonlinear acceleration guidance command and an acceleration autopilot are designed in order to make the guided projectile track the complex curved trajectory precisely.Using the position coordinate and velocity of the guided projectile which is given by the GPS only and the coordinate of the reference point on the desired trajectory,the guidance command is obtained.Upon the guidance activation,the projectile starts to impact the reference point and the precise trajectory tracking is accomplished.The guidance and control approach separates the projectile guidance and control system into an outer guidance loop and an inner control loop.The acceleration autopilot is used in the inner loop and the nonlinear acceleration guidance command is used in the outer loop.The autopilot is designed using the variable structure control theory.In the presented simulations,the guidance and control system is used to track a curved trajectory.The simulation results show that the guidance segment and autopilot can make the guided projectile track the trajectory precisely.
出处
《计算机仿真》
CSCD
北大核心
2011年第2期62-66,共5页
Computer Simulation
关键词
弹道跟踪
制导弹药
制导与控制
Trajectory tracking
Guided projectile
Guidance and control
