压差控制器的稳定性分析和设计参数的研究

压差控制器是航空发动机燃油计量的重要部件,用于保持计量活门前后的压差恒定.为探究其控制压差能力的因素,研究了某型发动机加力系统中压差控制器的性能,分析并推导出其影响控压差能力的主要因素,并在AMESim仿真环境下对所得结果进行建模仿真,验证了所得结论的正确性.在此基础上对其进行合理的改型,为保证改型不影响系统稳定性,用小偏差原理对改型前后的压差控制器辨识,得到传递函数,确保改型并未损失其动态性能.最终得到改进压差控制器控压差能力的理论依据.

Differential pressure controller stability analysis and research of design parameters

As an important part of aeroengine fuel measurement, differential pressure controller is used to keep the pressure drop constant of the measurement valve. In order to explore the factors of its ability, the differential pressure controller in an aeroengine afterburner was studied. The main factors that impact on the ability of control pressure drop were analyzed and deduced. Then a model was established with AMESim. Simulation was carried out to prove the correctness of the conclusion. Based on the fixed component, the differential pressure controller was remodeled reasonably. In order to keep the stability of the system from the improvement, a technical modification was done to get the transform function by using small deviation linearization method. Theoretical foundation which can improve the ability of differential pressure controller was got eventually.