摘要
为了分析非线性扭摆运动的特性,建立了基于非线性系统的扭摆运动模型,并利用数值仿真分析了非线性扭摆运动的特性.利用光栅传感器测量气浮转台的非线性扭摆运动角位移信号,通过角位移信号的振幅比和周期,分析了非线性扭摆运动的特性.实验结果表明:由于非线性阻尼的影响,非线性扭摆运动的振幅比会逐渐减小;由于非线性恢复力的影响,非线性扭摆运动的周期会随着振幅的衰减而减小.
In order to analyze the characteristic of nonlinear torsion pendulum, the torsion pendulum model based on nonlinear system is established. The angular displacement signal of the torsion pendulum is analyzed by the numerical method. The grating sensor is used to measure the angular displacement signal of the torsion pendulum. The amplitude ratio of the angular displacement signal decreases gradually due to the nonlinear damping. The period of the angular displacement signal changes with the amplitude due to the nonlinear resto ring force.
出处
《测试技术学报》
2013年第3期273-276,共4页
Journal of Test and Measurement Technology
关键词
扭摆运动
光栅传感器
非线性阻尼
非线性恢复力
torsion pendulum
grating sensor
nonlinear damping
nonlinear restoring force
