Parameter Sensitivity Analysis of a Brake Pressure Control System in Aviation Using an Electro-Hydraulic Servo Valve

Abstract

The landing gear system has the task of bearing the weight of the aircraft, bearing the impact load, and providing the braking function in the process of the aircraft taxiing, take-off, and landing. There are many parameters in the aviation brake pressure servo valve-controlled cylinder system (ABPSVCS) which will have a significant influence on the dynamic behavior of the system. Sensitivity analysis is an effective method to analyze the influence of system parameters on system characteristics, especially for nonlinear systems. The trajectory sensitivity method based on the description of system state space is used for the parameter sensitivity analysis of the ABPSVCS. By grouping various parameters for sensitivity analysis, the law of parameter sensitivity of each group is obtained, and the results are verified by experiments. The results can lay a theoretical and experimental foundation for the related research work of the aviation brake pressure servo valve.

Research on Buffer Characteristics of a New 2D Digital Buffer Valve for Vehicle Shift

“…With the development of hydraulic technology and control theory, fluid transmission and control technology is presenting new, vigorous development in the field of vehicles [1][2][3]. During the shifting of the vehicle, the friction elements in the shifting clutch undergo a slipping process during separation and engagement, which is inevitably accompanied by a torque disturbance, generating a corresponding shifting impact and affecting the stability of the shifting.…”