摘要
介绍了一种基于仿真星图的星敏感器地面功能测试方法。该方法对卫星(飞行器)运动轨道和姿态参数及星敏感器的姿态参数进行仿真计算、模拟生成星敏感器在轨状态下的仿真星图。星敏感器以此仿真星图作为测试信号源,通过对仿真星图的处理,实现对星点定位、星图识别、姿态计算等功能的全面测试。为简化电路设计,该方法选用星敏感器现有接口作为通讯接口。为满足功能测试的实时性需求,采取局部更新的手段来减少星图传输数据量。实验表明,该方法能对星敏感器电子部件的功能进行有效验证,在使用RS232接口、波特率设置为115200bps的情况下,可以实现20Hz数据更新率的测试。该方法实现简单、通用性强且不依赖其他外部设备,可以满足航天环境试验和整星联调阶段的功能测试任务要求。
A ground function test method of star sensor based on simulated sky image was proposed. Firstly, the orbit and attitude parameters of satellite （spacecraft） together with attitude parameters of onboard star sensor were simulated, and simulated sky image of the on-orbit star sensor was generated accordingly. Then, the simulated sky image was used as test signal source, and comprehensive function test of star sensor such as star centroiding, star identification and attitude determination could be performed by processing the simulated sky image. To simplify the circuit design,the existing interface of star sensor was chosen as the communication interface . To meet the demand of real-time function testing, a partial updating strategy was adopted to reduce the transferring data of the simulated sky image. Experiment indicates that the method can effectively validate the function of electronic parts of star sensor, and the data updating rate of 20 Hz is achieved by using a RS232 interface with baud rate of 115 200 bps. Independent of other equipments, the method is an easy and universal approach for the ground function test of star sensor. Moreover, the method can satisfy the task need of aerospace environment experiment and joint test of satellite.
出处
《红外与激光工程》
EI
CSCD
北大核心
2008年第6期1087-1091,共5页
Infrared and Laser Engineering
基金
民用航天预研项目(C5120062104)
关键词
星敏感器
功能测试
仿真星图
Star sensor
Function test
Simulated sky image
