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针对长航时、远航程的飞行器中景象匹配导航系统对光学成像传感器的需求,提出并设计了一种以板式行波超声电机作为驱动源的旋转型变倍机构,将其应用到图像匹配中,软、硬件结合,能明显提高导航系统的精确性、实时性和鲁棒性.机构占空比小,能耗少,可控精度高,能实时、稳定获取多幅不同分辨率的实测图像;同时,机构响应快,且负载变化不影响机构性能.实验数据证明,旋转变倍机构总质量为1.5 kg时,最快启动时间不超过0.7 ms,最快关闭时间在0.6 ms以内,能满足景象匹配导航系统的要求.
Aimed at the demand of optical imaging sensor for scene matching navigation system in long-haul and long-haul aircraft, a rotating zooming mechanism with plate-type traveling-wave ultrasonic motor as driving source is proposed and designed, which is applied to image matching , Combined with software and hardware, can obviously improve the accuracy, real-time and robustness of the navigation system.It has the advantages of small duty cycle, less energy consumption, high controllable precision, real-time and stable acquisition of multiple measured images with different resolutions At the same time, the mechanism responds quickly and the change of load does not affect the performance of the mechanism.The experimental data show that the fastest start-up time is less than 0.7 ms and the fastest closing time is less than 0.6 ms when the total mass of rotary zoom mechanism is 1.5 kg, Scene matching navigation system requirements.