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Attitude Processing Unit & Camera Head Unit Simulator for Multi-Headed Star Sensor

机译：用于多头星传感器的姿态加工单元和相机头部模拟器

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摘要

In Spacecraft Control Systems, Star Sensors provide orientation/attitude information of satellite on orbit using the star positions in the sky as reference. A typical star sensor consists of a Camera Head Unit (CHU) and an Attitude Processing Unit (APU). CHU collects star information from the sky using optics and detector, while APU processes the star positions obtained from CHU into meaningful information (attitude) and sends it to Attitude and Orbit Control System (AOCS) of satellite. Improving the accuracy from last two generations of Star Sensors, Mark-3 Star Sensor (M3SS) has been developed as a multi head configuration of CHUs with a centralized APU. M3SS is based on CMOS Active Pixel Sensor (APS) detector with 1K×1K elements array size. In order to test the functionalities of the APU and CHU end to end, both units should be available at the same time for the flow of commands and data respectively. To avoid the dependency of either unit on the other, there must be a provision for both to be tested independently. This necessitates the need of a CHU Simulator which behaves as a CHU in absence of CHU to test APU hardware and correspondingly an APU Simulator which acts as an APU for testing CHU hardware. The objective is to simulate the behaviour of CHU/APU in a software package so as to avoid waiting for the counter part's availability.
机译：在航天器控制系统中，星传感器在轨道上使用天空中的星级作为参考提供轨道上的卫星的定向/姿态信息。典型的星传感器由相机头单元（CHU）和姿态处理单元（APU）组成。 Chu使用光学和探测器从天空中收集星系，而APU将从楚的星际位置进入有意义的信息（态度），并将其发送到卫星的态度和轨道控制系统（AOC）。从最后两代的星传感器中提高了精度，MARK-3星传感器（M3SS）已被开发为CHU的多头配置，具有集中式APU。 M3SS基于CMOS有源像素传感器（APS）检测器，具有1K×1K元素阵列尺寸。为了测试APU和CHU结束的功能，两个单位应分别用于命令和数据流动。为避免任何一个单位的依赖性，必须为两者都有一个单独测试的规定。这需要需要一个楚模拟器，其在没有楚的缺失以测试APU硬件和相应的APU模拟器时表现为楚，该模拟器用作测试楚硬件的APU。目标是在软件包中模拟CHU / APU的行为，以避免等待柜台部分的可用性。

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