加速度-气动力综合试验系统研制

加速度-气动力综合试验系统主要用来考核飞行器结构强度和内装物的环境适应性。LJ-1离心机半径10．8m，适合开展大尺寸、危险品加速度试验，但是其吊篮只能固定在水平或竖直方向上，也不具有与加速度协调施加气动外压的控制系统。文章采用新颖的胀套锁紧结构，实现了吊篮在任意角度固定，并且抗翻转力矩达到13000N·m。气动力控制电路和气路安装在离心机上，上位机将转速通过光纤以太网发送给离心机上的PLC，PLC根据加速度控制气囊压力。试验验证LJ-1离心机具有对试件施加加速度载荷和气动力的综合试验能力。

Development of an acceleration and aerodynamic force combined test system

An acceleration and aerodynamic force combined test system is developed to assess the structural strength and the environmental worthiness of an aircraft and its inside. The LJ-1 centrifuge with radius of 10.8 m-radius can accommodate typical payloads including explosive payloads and oversized items, but the nacelle of L J- 1 can usually only be fixed in the horizontal direction or the perpendicular direction and there is no control system for adjusting aerodynamic force on the test units in accordance with the acceleration. An innovative structure is proposed to lock the nacelle in an arbitrary direction. The nacelle is locked by an innovative expanding sleeve structure in any direction, with an anti-overturn torque up to 13000 N.m. The control electric circuit and gaseous pipes are fixed on the centrifuge. The computer in the upper level sends the speed data to PLC on the centrifuge through optical fiber ethernet, and PLC controls the pressure of the gasbag according to the acceleration. The test results show that the centrifuge can successfully perform combined environment testing with controlled aerodynamic force on test traits in accordance with the acceleration load.