多操纵面飞机交叉耦合控制分配方法

针对操纵面交叉耦合效应下指令分配不精准的问题,基于序列二次规划提出了一种多操纵面非线性控制分配方法.在舵效线性条件下,引入虚拟控制指令建立了线性控制分配模型;考虑操纵面舵效交叉耦合非线性特征,以最小操纵面偏量为优化目标设计了交叉耦合控制分配器;采用修正BFGS算法改进序列二次规划,有效地求解了交叉耦合控制分配指令.仿真结果表明,所提出的方法能够合理利用所有操纵面并实现精确分配.

Cross-coupling control allocation for multi-surface aircraft

For inaccurate command allocation for multi-surface aircraft under the effect of cross-coupling problem,a non-linear multi-surface control allocation method was proposed based on the nonlinear sequential quadratic programming.Under the linear control of rudder effect,the linear control allocation model was developed by introducing the virtual control command.Furthermore,considering the nonlinear characteristics of in the control surface and rudder effect,the cross-coupling control distributor was designed with the use of minimum control deflections as the optimization objective.Then,a modified BFGS algorithm was applied to the sequential quadratic programming,which solves effectively the cross-coupling control allocation command.Simulation results show that the control surfaces can be properly controlled and distributed accurately with the proposed method.