Abstract
Taking-off and landing on unstructured terrain can effectively expand the application of aircrafts. The terrain-adaptive taking-off and landing technology is achieved through adaptive landing gear. The performance of the adaptive landing gear determines the safety performance of the aircraft during taking-off and landing. This paper proposes a comprehensive performance optimization method for four-leg landing gears based on the virtual equivalent parallel mechanism (VEPM). This method associates the motion variables of the parallel mechanism with the terrain data, and combines the original mechanism to form a VEPM. By analyzing the comprehensive performance of the equivalent parallel mechanism, the particle swarm algorithm is used to optimize the dimensions of the landing gear mechanism. The new optimization method can enhance the comprehensive performance of the landing gear mechanism, which contributes to the structural design and optimal control of the terrain-adaptive landing gear.
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