Controlling Damping Force during Aircraft Arrestment Using Self-energized Valve Mechanism

This paper investigates efforts for controlling damping force during the aircraft landing on aircraft carrier. Since flow through restricted opening ensures damping in any system, the role of a variable orifice is significant. A new self-energized valve mechanism is conceptualized to control the damping force and a mathematical model for energy absorption and then dissipation by means of hydro-pneumatic arresting system is presented. The equation of motion is nonlinear and non-homogenous in nature and has been solved using Taylor's series expansion. Numerical simulation is carried out to extract the performance parameters. The model is capable of predicting the dynamic behavior of the arrester system for variable mass and velocity of landing aircraft. The area of orifice is controlled by self-energized valve mechanism as against contemporary constant run-out control valve. The behavior of arrester system with & without self-energized valve mechanism is compared.