Landing gear

About: Landing gear is a research topic. Over the lifetime, 3403 publications have been published within this topic receiving 25370 citations. The topic is also known as: landing gear & gear.

Tail Boom for aircraft

Abstract: An aircraft of the type having retractable landing gear and a pusher propeller is provided with a twin tail boom. The tail boom has a configuration to prevent the lowermost point of the pusher propeller from contacting a landing surface when landing the aircraft, even with the landing gear retracted, so that the engine of the aircraft is not damaged as a result of the pusher propeller being unable to rotate during the landing.

Landing gear for truck trailers

Abstract: This invention relates to landing gears for trailers which in use are connected to trucks and supported at their front portions thereby, but which when disconnected from the trucks are held at their front ends in position by landing gears. Landing gears of the general type to which my invention...

Mathematical model and vibration analysis of aircraft with active landing gear system using linear quadratic regulator technique

Abstract: This paper deals with the study and comparison of passive and active landing gear system of the aircraft and dynamic responses due to runway irregularities while the aircraft is taxying. The dynamic load and vibration caused by the unevenness of runway will result in airframe fatigue, discomfort of passengers and the reduction of the pilot’s ability to control the aircraft. One of the objectives of this paper are to obtain a mathematical model for the passive and active landing gears for full aircraft model. The main porpuse of current paper is to design Linear Quadratic Regulator (LQR) for active landing gear system that chooses damping and stiffness performance of suspension system as control object. Sometimes conventional feedback controller may not perform well because of the variation in process dynamics due to nonlinear actuator in active control system, change in environmental conditions and variation in the character of the disturbances. To overcome the above problem, this research designs a controller for a second order system based on Linear Quadratic Regulator. The performance of active system is compared with the passive landing gear system by numerical simulation. The results of current paper in compared with the previous work mentioned in reference, demonstrate 37.04% improvement in body acceleration, 20% in fuselage displacement and 13.8% in the shock strut travel. The active landing gear system is able to increase the ride comfort and good track holding by reducing the fuselage acceleration and displacement and load induced to airframe caused by runway excitation.

Air-ground detection system and method

Abstract: A method to detect if an aircraft is airborne or on the ground may include detecting at least one of a truck tilt of each main landing gear and a strut compression of each main landing gear The method may also include detecting the aircraft being airborne or substantially on the ground in response to at least one of the truck tilt of each main landing gear and the strut compression of each main landing gear