大型车载光电跟踪设备隔振基础的主动控制

为了保证大型车载光电跟踪设备的稳定工作,提出了一种跟踪架的隔振方法。采用空气弹簧加上电磁作动器实施减振,其电磁作动器采取差动布置方案,使电磁作动器的输出力与控制电流成线性关系。对几种控制方法进行了对比分析,选用绝对速度反馈控制,保证隔振基础对高频振动的隔振能力,同时避免低频振动时产生共振。最后,通过MAT-LAB进行仿真分析。仿真和实验结果显示,z向低频振动振幅已从5×10-5m减至1.8×10-5m,θx向低频振动振幅从2.2×10-5m减至0.6×10-5m,θy向低频振动振幅从2.0×10-5m减至0.4×10-5m,同时能够避免产生共振,表明采用绝对速度反馈主动控制方法可以起到较好的减振作用。

Active control and simulation for vibration isolation foundation of giant vehicular photo-electric tracker

In order to realize stable working of giant vehicular photo-electric trackers, a method of vibration isolation is proposed for a tracking frame in a photo-electric tracker, in which a air spring and an electromagnet actuator is used to isolate the vibration. The layout of electromagnet actuator is differential, so the force of electromagnet actuator and the control current are linear. Several kinds of control methods are analyzed, and the absolute velocity feedback control method is chosen to keep the vibration isolation capability in high frequency and avoid syntony in low frequency vibration. The results of MATLAB simulation and experiment indicate that the high frequency amplitudes of z-DOF ,θx -DOF and θy -DOF have been reduced from 5×10-5 m to 1.8×10-5 m, 2.2×10-5 m to 0.6×10-5 m and 2.0×10-5 m to 0.4×10-5 m, respectively, meanwhile the syntony can be avoided. These results show that this vibration isolation method by absolute velocity feedback control can evidently promote the vibration isolation capability.