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.

Nose Landing Gear Simple Adaptive Shimmy Suppression System

Abstract: The occurrence of shimmy vibration in aircraft nose landing gear can cause an increase of fatigue stress on the nose landing gear mechanical elements that can eventually lead to high wearing of com...

System and method for detecting an on ground condition of an aircraft

Abstract: Systems and methods for detecting an on ground condition of an aircraft are disclosed. A weight on wheel system may determine that an aircraft is on the ground. Wheel speed sensors may measure the speed of the aircraft wheels. Axle reference speeds may be calculated for each landing gear based on the speed of the aircraft wheels. A brake control unit may determine that the axle reference speed for each axle of the landing gears is above an on ground threshold speed, and the brake control unit may allow braking to be applied.

Improved aircraft suspension system with mechanism operable to establish system vertical stiffness and damping and mechanism operationally independent thereof to establish system roll stiffness and damping

Abstract: A passive aircraft landing gear system in which the spring rate and damping for aircraft rolling motions about a longitudinal axis are independent of the spring rate and damping for aircraft vertical motions, thereby permitting the landing gear system to optimally accomplish both landing impact attenuation and ground resonance instability abatement.

Real-time Landing Gear Control System Based on Adaptive 3D Sensing for Safe Landing of UAV

Abstract: Unmanned aerial vehicles (UAVs) have been utilized in many applications, such as transportation, land surveying, and exploration. To expand the safe flying area for UAVs, a technology for safe landing on ground with unknown shapes is important. Here, we propose a real-time landing gear control system with adaptive 3D sensing for safe landing on an unknown ground. This system performs adaptive 3D sensing in which the sensing area is changed according to the position and attitude of the UAV to always measure the area of contact between the landing gears and ground when landing. Furthermore, according to the measured ground shape, the proposed system controls the lengths of landing gears in real time to realize safe landing where all the landing gears contact the ground simultaneously. We simulated landing on an unknown ground and evaluated the contact timings of landing gears. The proposed system could update the heights of contact points of two landing gears at a rate of 100 Hz. Moreover, the contact time lags of the landing gears were improved. Subsequently, the landing gears contacted the ground almost simultaneously when the lengths of landing gears were controlled using adaptive 3D sensing. The proposed system offers high potential and room for further improvement on safe landing of UAVs.