气动负载模拟器的多余力矩分析

为了分析气动负载模拟器中多余力的形成及影响因素，介绍了气动负载模拟器的工作原理、结构框图及实验平台，推导了气动负载模拟器的数学模型，并通过实验和仿真对比模型进行了验证。采用线性化方法定性分析了影响气动负载模拟器多余力的3个因素——被动压差、惯性力矩以及摩擦力矩。采用非线性仿真定量分析了该3个因素分别对气动负载模拟器的多余力矩的影响。得出了在气动伺服加载系统中，摩擦力矩是引起系统多余力矩的重要因素。

Extraneous torque analysis of pneumatic load simulator

In order to analyze the formation and influence factors of the extraneous torque of pneumatic load simulator, the working principle, structure diagram and experimental platform of the pneumatic load simulator were introduced and the mathematical model of the pneumatic load simulator was deduced. The model was verified through comparing the result of experiment and simulation. The three influence factors (passive pressure, moment of inertia and friction torque) of the extraneous torque of pneumatic load simulator were analyzed qualitatively by using linearization method. The influence of the three factors on the extraneous torque of pneumatic load simulator was analyzed quantitatively by using nonlinear simulation. The conclusion is that the friction torque is an important factor which comes into the extraneous torque in pneumatic servo loading system.