摘要
针对一种两轴四音圈电机驱动的快速反射镜,提出了一种驱动控制方法。该方法为每个电机配置一个高带宽的电流环,通过控制电流给定量的符号和大小,实现同一轴上两台电机的同步推挽运动;为了改善系统阻尼,抑制谐振,提高响应频率,基于快速傅里叶变换(FFT)谱分析的方法,精确测量了快速反射镜传递函数,并引入一个双二阶型校正函数,对快速反射镜的开环响应特性进行改善。实际测试结果表明:快速反射镜高达20 d B的谐振峰得到有效抑制,-3 d B响应带宽由校正前的118 Hz提高到177 Hz,稳定时间由原来的151 ms降低到3.5 ms,超调量由原来的83.3%降低到1.51%,快速反射镜的动态响应得到明显改善,证明了该方法的有效性。
Aiming at the fast steering mirror driven by four voice coil actuators, a drive control method was proposed in this paper.The high bandwidth current loop was designed for each motor, and the push-pull motion was realized by changing the current direction and magnitude.In order to improve the system damping and suppress the mechanical resonance, accurate transfer function was identified based on FFT analysis, and then a compensator with a biquad filter was introduced.The test results show that the 20 dB resonance peak is effectively suppressed,-3 dB bandwidth is increased from 118 Hz to 177 Hz, the setting time is reduced from 151 ms to 3.5 ms, the overshoot is reduced from 83.3% to 1.51%.And the dynamic response of the fast steering mirror is improved obviously, which proves the validity of this method.
出处
《电子测量与仪器学报》
CSCD
北大核心
2017年第7期1115-1121,共7页
Journal of Electronic Measurement and Instrumentation
关键词
快速反射镜
音圈电机
电流环
频率特性测试
谐振抑制
fast steering mirror
voice coil actuator
current loop
frequency response measurement
resonance suppression
