导叶作动器参数敏感性分析

Parameter Sensitivity Analysis of Guide Vane Actuator

液压作动器以其高可靠性、高功重比和高适应性等优点被广泛应用于航空领域,其动静态性能的提升主要取决于系统的关键参数匹配.建立了发动机导叶作动器的性能仿真模型,并基于试验验证了模型结果的精度,利用该模型分析了作动器的作动筒两腔面积差、冷却孔直径、伺服阀额定流量和管路直径等关键设计参数,对最大速度、响应时间、跟踪误差和频率响应等动静态性能的敏感性问题,得到了参数影响规律及影响程度,并量化计算了参数对性能的敏感性,得到了参数的敏感性排序为额定流量>面积差>冷却孔直径>管径,为作动器产品的参数匹配设计提供了参考依据和理论支撑.

Hydraulic actuators have been widely used in aerospace airplanes for their advantages of high reliability,high power-to-weight ratio,and high adaptability,etc.The improvement of their dynamic and static performance mainly depends on the matching of key parameters of the system.This paper establishes a performance simulation model of the engine guide vane actuator,and verifies the accuracy of the model results based on the test.The model is used to analyze the actuator's key design parameters such as the difference in the area of the two chambers of the actuator's actuator cylinder,the diameter of the cooling holes,the rated flow rate of the servo valve,and the diameter of the pipeline,and analyzes the sensitivity of the actuator's kinetic and static performances such as the maximum speed,the response time,the tracking error,the frequency response,and so on,and the parameter influence laws and influence The influence law and influence of parameters are obtained,and the sensitivity of parameters to performance is quantitatively calculated,which provides a reference basis and theoretical support for the parameter matching design of actuator products.