The problem of performance optimization of a skid-to-turn vehicle is studied. The objective is to minimize the time required to steer the vehicle from an initial state at a nonzero altitude to a ground target state subject to constraints on altitude and crosstrack. A performance index is designed that enables the vehicle to fly at a constant low altitude for as long as possible while performing a bunt maneuver (negative sensed acceleration) as quickly as possible at the end of the trajectory. To implement the objective functional and incorporate all required constraints, a two-phase optimal control problem is developed. The key features of the two-phase optimal control problem are provided for various values of the objective functional weight and maximum allowable crosstrack. Finally, a sensitivity analysis is performed to assess the accuracy of the solutions obtained to the true optimal solution.

研究了转弯车辆的性能优化问题。目的是最小化将车辆从非零高度的初始状态转向到地面目标状态所需的时间，该时间受高度和交叉轨迹的约束。设计了一种性能指标，使车辆能够在恒定的低空飞行尽可能长的时间，同时在轨迹末端尽可能快地执行短打动作（负感测加速度）。为了实现目标功能并合并所有必需的约束，开发了两阶段最优控制问题。针对目标功能权重和最大允许交叉轨迹的各种值，提供了两阶段最优控制问题的关键特征。最后，