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在航天飞行试验末段测控中,通常目标上的合作设备已经大大减少,受实际条件限制,测量区域也难以布设足够的光测和脉冲雷达等测量装备。通过对末段遥测数据进行较为精确的配时,采用多站遥测时差进行外测定位的方法 ,仅利用末段的遥测数据就可完成对目标的定位。本文从理论上分析了多站遥测时差定位外测方案误差分析模型,并通过仿真试验验证了模型的正确性和有效性。采用本模型能够满足试验精度要求,可节省大量的外测装备,简化测控方案设计,具有易于保障的特点。
In the final test and measurement of the space flight test, the cooperation equipment on the usual target has been greatly reduced. Due to the actual conditions, it is also difficult to lay out enough measurement equipment such as optical and pulsed radar in the measurement area. Through the more accurate timing of the last segment of telemetry data, using multi-station telemetry time difference for external positioning method, only the last paragraph of the telemetry data to complete the positioning of the target. In this paper, the error analysis model of multi-station telemetry time-difference positioning external measurement scheme is analyzed theoretically, and the correctness and effectiveness of the model are verified through simulation experiments. The model can meet the requirements of test accuracy, save a large number of external measurement equipment, and simplify the design of measurement and control scheme, which is easy to protect.