【摘要】 在扭振实验台上常用直流电动机模拟原动机，直流电动机自身存在惯性特性和转速反馈，使系统高频特性发生改变，加大了扭振的稳定性并增大了轴系模态阻尼，本文分析了这一影响，并采用增加控制信号的方法修正系统的高频特性，调整轴系模态阻尼，从而更加准确地模拟轴系扭振特性。更多还原

【Abstract】 At the torque and vibration experimental table, DC motors are of tenused to stimulate the prototype and the motors have inertial characteristics and ro-tating speed feedback,which makes system high-frequency characteristics varied,torque and vibration stability and axial simulation state damping increased. The pa-per analyzed this effect, rcvised the system high - frequency characteristics by in-creasing controlling signals,adjusted the axial simulation state damping so as to ex-actly simulate the axial vibration characteristics.更多还原