航空发动机PI控制参数频域最优整定方法

针对航空发动机高、低压转速和压比的控制回路,研究满足幅值裕度和相角裕度要求的比例-积分(PI)控制参数稳定域确定方法.根据系统在频域的稳定域解析模型,建立考虑PI控制器的系统参数频域稳定域图形.根据典型的动态性能指标和鲁棒性指标定义的优化目标函数,在所得到的控制参数稳定域中寻找到一组最优的PI控制参数.该方法应用于航空发动机高、低压转速和压比回路控制器参数设计中,设计了不同状态下的PI控制器,仿真结果表明,这种整定方法能够使闭环系统满足性能指标和鲁棒性. 

Frequency domain optimal tuning method of PI control parameters for aero-engine

For the aero-engine high and low rotor speed control loops and pressure ratio control loop, the method of determining the stability region of the proportion-integration (PI) control parameters satisfying the gain margin and phase margin was researched. According to the system stability analytical model in frequency domain, the stability region graphic of system parameters in frequency domain with PI controller considered was established. The optimal objective function was defined in terms of the typical dynamic performance indices and robustness indices, and a set of optimal PI control parameters were found in the obtained stability region of control parameters. This method was applied to controller parameters design of aero-engine for the high and low rotor speed control loops and pressure ratio control loop, and PI controllers under different states were designed. Simulation results demonstrate that the tuning method satisfies performance indices and robustness of closed loop system.