Investigation of the Operation of an Electrohydraulic Control System of a Flying Vehicle Under Failure Conditions
Year: 2018
Type: conference-paper
Abstract: Electro-hydraulic system technology is employed in many modern control systemsincluding aircrafts and missile flight control systems. These systems used to positionthe control surfaces of the flying vehicles with high controllability and accurate action.Pilot or autopilot commands are translated into electrical position commands to theelectro-hydraulic control system (EHCS). This study is based upon the developmentof a detailed nonlinear mathematical model of the EHCS and a computer simulationprogram using MATLAB/SIMULINK package. The EHCS mainly consists of twosystems; main and secondary with two separate active hydraulic power supplysystems, used to supply the EHCS with the required power. The studied EHCSincorporates two electro-hydraulic servo-valves and a smart design of built-in directoperated directional control valves, controlled by electrical solenoids. The EHCS isdesigned with smart capability to over-ride the possible problems of failure in thehydraulic power supply systems or in the servo-valves. The transient response isobtained by the simulation program using the solver of ode23s (stiff/Mod.Rosenbrock) method. A comparison between the dynamic responses of the EHCS ispresented in different modes of failure. The simulation results show that this EHCS iscapable to provide a continued safe flight even when experiencing a certaincomponent failure or a combination of failures.
Authors: M. Fadel, M. Rabie, A. Youssef
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2962594780