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首页> 外文期刊>IEEE Aerospace and Electronic Systems Magazine >Limited angle BLDC for scan mirror application in space satellite system
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Limited angle BLDC for scan mirror application in space satellite system

机译：太空卫星系统中用于扫描镜的有限角度BLDC

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The scan mechanism of the satellite system consists of a gimbal scan mirror actuation system. From the Earth, electromagnetic radiation is reflected by the scan mirror provided in the satellite which is further collected and reduced by telescope and thermal/optical detectors for processing the necessary information. A precise position sensing mechanism such as encoder or INDUCTOSYN® for getting the angle information of the scan mirror with a high level of accuracy is included as a feedback element of servo loop. The position information is fed to the processor for controlling the motor attached to the scan mirror and thereby rotating the mirror to the desired position at an intended rate. The desired features of the motor to be used in the scan mechanism are small size and weight, quick response, ripple-free torque, and maintenance-free long life. The optimized surface mounted permanent magnet motor design for spacecraft applications with high torque density, minimum cogging torque, better positional stability, and high torque-to-inertia ratio is presented in detail in [1]. Rotary actuators play a major role in the position control of such scan mechanisms. Usually a servo loop is constructed with the motor, feedback mechanism, and controller. The motor capable of converting small electrical signals into limited angular movement is chosen for driving the scan mirror.
机译：卫星系统的扫描机制包括一个万向节扫描镜致动系统。电磁辐射被卫星上的扫描镜从地球反射，然后由望远镜和热/光探测器进一步收集和减少，以处理必要的信息。作为伺服回路的反馈元件，包括一个精确的位置检测机构，例如编码器或INDUCTOSYN®，用于以高精度获取扫描镜的角度信息。位置信息被馈送到处理器，以控制连接到扫描镜的电机，从而以期望的速度将镜旋转到所需位置。扫描机构中使用的电动机的理想功能是体积小，重量轻，响应速度快，无脉动转矩和免维护长寿命。在[1]中详细介绍了航天器应用的优化的表面安装永磁电动机设计，该设计具有高转矩密度，最小齿槽转矩，更好的位置稳定性和高转矩惯性比。旋转致动器在这种扫描机构的位置控制中起主要作用。通常，伺服回路是由电动机，反馈机构和控制器构成的。选择能够将小电信号转换为有限的角度运动的电动机来驱动扫描镜。

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