基于线性自抗扰控制器的燃气流量可调发生器压强控制算法研究  

Research on Pressure Control Algorithm of a Flow Adjustable Gas Generator Based on linear Active Disturbance Rejection Control

作　　者：刘源翔[1] 聂聆聪[2] 张皎[1] 杨旭[1] 

机构地区：[1]北京理工大学宇航学院,北京100081 [2]中国航天科工集团三十一研究所,北京100074

出　　处：《推进技术》2015年第12期1768-1773,共6页Journal of Propulsion Technology

摘　　要：为了提高对燃气发生器燃气流量的控制效果,建立了一种压强闭环控制系统。分析了此系统的工作原理,并建立系统的动态模型。针对系统模型的特性,设计线性自抗扰控制器对其进行控制。由于扩张状态观测器的存在,线性自抗扰控制器在一个较大的范围内很好地补偿了系统参数波动对输出的影响,提高了系统的响应速度与控制精度。在不同工况与干扰下仿真结果表明,相对于传统控制器,线性自抗扰控制器缩短了30%的调节时间,降低了约50%的干扰输出,具有更好的动态特性。In order to improve effects of gas generator flow regulation,a pressure closed loop control system was built. The working principle was analyzed,and the dynamic model of the system was established. According to the characteristics of the system model,linear active disturbance rejection controller（LADRC）was designed to control it. Because of the extended state observer,LADRC can compensate the effect caused by parameter fluctuation on the output well in a larger range. It improves the speed of response and the control accuracy. Simulation results in different working conditions show that LADRC shortens 30% adjustment time,and reduces about 50% output caused by interference. It has better dynamic characteristics than the traditional controller.

关 键 词：燃气发生器 压强控制 动态模型 扩张状态观测器 线性自抗扰控制 

分 类 号：V433[航空宇航科学与技术—航空宇航推进理论与工程]