Influence of vibration on transfer function of television imaging system
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摘要: 为了研究系统平台振动对电视成像系统传递函数的影响，通过将不同振动条件下系统的传递函数进行对比分析，利用能量积分法，建立系统平台在不同振动条件下系统传递函数仿真模型。利用快速反射镜系统和ISITE测量平台组合，对振动条件下系统传递函数进行测量和验证。仿真和实验数据结果表明：对于在研电视成像系统，当振动频率低于曝光频率时，随着系统平台振动频率的增加，系统传递函数的下降速度由静止时的0.167逐渐增加到0.237；当振动频率高于曝光频率时，随着系统平台振动频率的增加，系统的传递函数的下降速度波动性增加，并逐渐趋于在静止时的1.42倍附近。Abstract: In order to study the transfer function of television imaging system affectted by vibration,the transfer functions under different vibrations were analyzed and compared, and through utilizing the energy integral method.And then the laws were measured and verificated by the fast mirror system and ISITE measurement system. Simulation and experiments results show that for the TV imaging system developed, when the frequency of vibration is lower than the exposure frequency,the downtrend of the transfer function can increase from 0.167 in static condition to 0.237 with the increasing frequency of vibration ; when the frequency of vibration is higher than the exposure frequency,the downtrend of the transfer function can fluctuate increasingly and gradually tends to 1.42 times that of the static condition.
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Keywords:
- vibration /
- television imaging system /
- transfer function /
- simulation model /
- fast mirror system
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