一种多通道输出信号切换控制技术

在某型机全机疲劳试验中,加载载荷由机体结构载荷和主起落架载荷构成,试验时机体结构载荷与主起落架载荷按照试验顺序轮流加载。该试验项目采取前起-主起支持方式约束试验件,主起落架垂向载荷采用被动加载的方式。在前期调试过程中,由于起落架假轮的变形、试验加载误差、其余加载点累积误差等原因,主起落架载荷理论上被动加载到最大值时,主起假轮垂向传感器反馈比理论值小很多,基于此提出了被动加载点的主动控制技术,并在试验中得到验证。

In the fatigue test of a certain type of aircraft, the loading load is composed of the structural load of the body andthe load of the main landing gear, and the structural load of the body and the load of the main landing gear are loaded in turn ac-cording to the test sequence during the test. The test item adopts the mode of ＂front landing - main landing＂ supporting method toconstrain the test article, and the vertical load of the main landing gear adopts the mode of passive loading. In the early debuggingprocess, due to the deformation of the landing gear false wheel, the test loading error and the accumulated error of the other loadingpoints, the load of the main landing gear is theoretically passively loaded to the maximum value. The feedback of the vertical sensorof the main wheel is much smaller than the theoretical value. Based on this, the active control technology of the passive loadingpoint is proposed and verified in the experiment.