改进的特征结构配置法在飞控系统设计中的应用

The Application of Reformed Eigenstruture Assignment Algorithm in Flight Control System Design

飞行控制系统设计一直是飞行器设计的重要模块之一,其性能直接影响飞行器的性能。极点配置是控制系统设计常用的方法,但它不能同时配置系统的特征向量。特征结构配置是近年来逐渐广泛应用的一种方法,它可以实现特征值特征向量的期望配置,但一般的全状态反馈特征结构配置由于量测量较多使系统过于复杂,而输出反馈特征结构配置又不能确保闭环系统的稳定性。为此,文中提出了一种新的算法——改进的特征结构配置法,它只将需要稳定的几个特征值配置到期望的位置,对未配置的特征值通过附加反馈使其稳定。其中,附加反馈增益的确定通过使二次型性能指标最优实现。仿真结果表明,在高性能飞控系统的设计中,文中方法优于一般的特征结构配置法。

The flight control system design is one of the important modes in aircraft design. Its performance influences the aircraft performance directly. The pole assignment algorithm is usually used in flight control system design, but the eigenvector could not be desigened with this method. Eigenstruture assignment algorithm which can implement desired pole assignment is used gradually in resent years. With normal full state feedback eigenvalue algorithm, the control system will be too complex because of too many measurement variables while the stability of the control system can not be insured with output feedback eigenvalue algorithm. Therefore a new algorithm - reformative algorithm of eigenstruture assignment- is proposed in this paper, in which some of the eigenvalues can be assigned to the desired places and additional feedback are used to stabilize the remaining eigenvalues. The additional feedback gain is received by the linear quadratic index. The simulation results show that the algorithm could be used to design control system with high performance and it is superior to usual eigenstructure assignment.