LAMOST小焦面系统模拟星像观测仿真与单元测试

Simulation of Stellar Image Observation and Unit Testing on Small Focal Panel System of LAMOST

本文主要介绍LAMOST光纤定位控制程序中的模拟星像观测仿真的实现算法,包括模拟星像产生、角度参数计算、星像分配和干涉处理等,对模拟星像进行观测仿真测试,在系统运行之前有必要验证控制程序中各种算法的可行性和合理性。单元定位是LAMOST主要关键技术之一,其定位精度是焦面系统的核心。由于各种误差的存在,某些单元的精度达不到要求,利用小焦面系统对4000个单元进行逐批跑合测试,通过星像仿真实验完成了4000个单元的精度跑合测试。因此,星像观测仿真对测试程序算法和测试单元精度都具有重要意义。

The realization algorithms of simulation of stellar image observation of LAMOST＇ optical fiber posi- tioning control software are mainly discussed, including producing and assigning simulation stars, computing an- gle parameters, and eliminating interferences, and having tests for the simulation. It is necessary to test feasibil- ity and rationality of all kinds of algorithms before operating of the LAMOST system. Unit positioning is one of key technologies of LAMOST, whose positioning accuracy is the core of focal panel system. The precisions of some units fail to meet the requirement because of all kinds of errors. Using the simulation, 4000 units running for testing have been finished on small focal panel system. Hence, the simulation is of great importance to both test algorithms and test unit precisions.