预防Ⅱ型PIO的作动器设计

重点分析由作动器非线性因素(速率限制)引起的Ⅱ型PIO问题。将非线性因素线性化,采用赫尔维茨稳定性方法分析线性时不变系统的稳定性,采用二次型稳定性方法分析参数时变系统的稳定性。运用ROBAN算法确定稳定域,进而得到条件分析模型,分析了三种条件下的PIO趋势,给出合适的作动器设计方法。仿真研究表明,采用该方法设计的作动器使得某型飞机飞控系统具有良好的鲁棒性,可以有效避免Ⅱ型PIO的产生。

Design of Actuator Preventing Type Ⅱ PIO Problem

The paper places the focus on analyzing Type II PIO problem caused by non-linear factors （rate limitation） of actuator. By linearizing non-linear factors, the paper employs Routh-Hurwitz stability criterion and secondary stability method to analyze the stability of linear time invariant system separately. It determines the stability domain through ROBAN algorithm, further obtains condition analysis model, ana- lyzes PIO trends under three conditions, and offers the suitable design method of actuator. Emulation re- search reveals that actuators designed in such a way can render excellent robustness to the flight control system of a type of airplanes, and avoid the generation of Type II PIO effectively.