基于模糊误差判断算法的航空发动机PID控制

Aero-Engine PID Control Based on Fuzzy Error Judgment Algorithm

普通比例积分微分(PID)控制与其他智能控制相比较,应用广泛,且算法更简单、容易实现。但是应用到复杂的、多变的航空发动机控制时,其难以满足其控制要求。为实现对航空发动机的智能控制,提出模糊误差判断PID控制。由模糊规则表、误差判断规则以及PID控制组成模糊误差判断PID控制器。该方法对控制过程中改变模糊规则表进行了研究。模糊规则表根据经验得出;误差判断规则将根据误差的大小,对模糊规则表进行修改;模糊规则表与PID控制器结合调节控制量,达到控制执行机构的目的。使用MATLAB/Simulink进行算法仿真。仿真结果显示:模糊误差判断PID控制算法运用于航空发动机控制效果良好,验证了所提算法的可行性。仿真结果证明了改变模糊控制规则表的控制方法是有效的。该研究为设计智能控制提出了一种新的方法。

Compared with other intelligent control,ordinary proportional integral differential(PID)control is widely used,and the algorithm is simpler and easier to realize.However,it is difficult to meet the control requirements when it is applied to the complex and changeable acro-engine control.In onler to realize the intelligent control of aeroengine,fuzy error judgment PID control is proposed.The fuzry error judgment PIlD controller is composed of fuzy rule table,error judgment rule and PID control.This method is used to study the change of fuzxy rule table in the control process.The furzy rule table is obtained from experience.The error judgment rule will modify the fuay rule table according to the error size.The furny rule table and PID controller are combined to adjust the control quantity and achieve the purpose of controlling the actuator.MATL.AB/Simulink was used for algorithm simulation.The simulation results show that the fuzay error judgment PlD control algorithm is applied to the control of aeroengine,and the effect is good,which verifies the feasibility of the proposed algorithm.The simulation results show that the control method of changing the furry contml rule list is effective.This research provides a new method for designing intelligent control.