Heading load dynamic simulation of landing gear test

Abstract

In this paper, a force-measuring platform which is used to test the heading load of landing gear is analyzed, as well as the influences of its inertial forces on the accuracy of the test results. Two sets of drop test simulation models, considering or not considering the dynamometer platform, are built based on the dynamic simulation platform named LMS Virtual.lab motion. The installation gap between the heading force sensor and the dynamometer platform is simulated through the form of spherical contact. The gap size was changed at two subsidence speeds of 1 m/s and 1.5 m/s, and the relationship between the gap size and the heading inertia force of the force-measuring platform was analyzed. According to the design requirements of the drop test in Book 14 of the Aircraft Design Manual, a drop test bench was built. The landing gear load of a high-speed UAV landing gear was measured and compared with the simulation results.