一种具有自刹车功能的加速供油规律设计方法  

A Design Method of Acceleration Fuel Supply Law with Self-breaking Function

作　　者：吉思环 李焦宇 刘亚君 JI Si-huan;LI Jiao-yu;LIU Ya-jun(AECC Shenyang Engine Research Institute,Shenyang 110015,China)

机构地区：[1]中国航发沈阳发动机研究所,沈阳110015

出　　处：《航空发动机》2021年第3期80-85,共6页Aeroengine

基　　金：航空动力基础研究项目资助。

摘　　要：为了解决某型发动机在地面高温天气条件下加速性调整困难的问题,提出了一种具有自刹车功能的加速供油规律设计方法。其主要设计思想为:在未满足加速性判断指标要求前,尽可能多地供油以提高加速性;当满足加速性判断指标后,依据其与控制目标值的接近程度,逐步减少加速供油量进行自刹车,直至发动机转速上升率降至PID控制参数可控范围内,最终由PID控制算法控制至目标值。根据此设计方法编制出相应的控制逻辑,并利用基于迭代算法的过渡态模型进行仿真验证。结果表明:在原有PID控制参数完全保持不变的情况下,采用该设计方法可以有效地将发动机加速时间缩短0.3~0.5 s,保证加速过程满足过渡态指标和稳定裕度的要求,有效地解决了该型发动机加速性调整困难的问题。It was difficult to adjust the acceleration of a certain engine in high temperature weather on the ground.In order to solve the problem,a design method of acceleration fuel supply law with self-breaking function was proposed.The main design idea was:before the acceleration judgment index was met,the fuel supply should be as much as possible to improve the acceleration.After the acceleration judg⁃ment index was met,according to the proximity between the acceleration and the control target value,the acceleration fuel supply was grad⁃ually reduced to self-breaking until the engine speed rise rate dropped to the controllable range of PID control parameters.Finally,engine speed rise rate is controlled to the target value by the PID control algorithm.The corresponding control logic was worked out according to this design method and the transient state model was used for simulation verification based on iterative algorithm.The results show that the design method can effectively shorten the engine acceleration time by 0.3-0.5 s when the original PID control parameters remain un⁃changed,and the acceler-ation process can meet the requirements of transient state index and stability margin and the problem of difficulty in adjusting acceleration of the engine can be solved effectively.

关 键 词：加速供油规律 自刹车 过渡态模型 加速性 航空发动机 

分 类 号：V231[航空宇航科学与技术—航空宇航推进理论与工程]