摘要
为研究涡喷发动机在大飞行包线、工况大范围变化条件下燃油控制器的可行性,在Easy5框架下,建立某型发动机燃油控制系统仿真模型,由小偏离发动机线性模型、数字电子控制器校正环节、油泵及步进电机驱动的燃油流量控制执行装置构成转速闭环控制系统,发动机燃烧室压力作为燃油喷嘴的背压。仿真研究发动机转速控制系统特性,调试控制参数并进行燃油控制系统实物在环半物理仿真试验。结果表明:与地面静止最大状态相比,燃油流量控制执行装置增益变化在5%以内;采用变参数PI控制规律能实现大工况范围内发动机转速闭环控制,鲁棒性较好。研究还表明:基于Easy5框架构建涡轮发动机控制系统模型、开展控制规律与算法的研究是有效的。
A turbojet engine fuel control system was modeled and simulated under framework of Easy5,in order to research feasibility of fuel controller of the turbojet engine in flight of large round-line and under operating state with large diversification rang.The model was built as a close loop control system for rotational speed,on the basis of incorporation of a linear engine model with small departure,a DEEC controller unit,and a fuel control actuator driven by a step-motor and an oil pump,and the combustor pressure was modeled as backup pressure of the fuel nuzzle.Characteristics of the control system for rotational speed of the engine were studied by simulation,control parameters were adjusted,and hardware in-loop validation test was carried out.The results show that changes of gain in the fuel control actuator are within 5% comparing with the extreme state of stillness on the ground;and close loop control of the engine can be realized with better stableness in operating state with large range by using variable parameters PI algorithm.It also shows that the study about model of turbojet engine control system built under the framework of Easy5,development in control laws and algorithm,is effective.
出处
《机床与液压》
北大核心
2011年第7期96-99,110,共5页
Machine Tool & Hydraulics
