遥测力学环境数据箭上实时处理技术研究

Rocket-borne environmental data processing for launch vehicle telemetry system

力学环境数据的实时传输是导致运载火箭遥测系统容量紧张的根本原因。通过设计独立的力学环境测量及数据处理子系统构建新的遥测系统体系结构,在箭上完成力学环境数据处理并将处理结果代替原始测量数据发到地面;提出了数据重叠分段处理方法,解决了飞行全程处理冲击响应谱的误差积累问题;建模仿真给出了箭上力学环境数据的优化处理参数;完成了箭上实时处理器设计。试验表明:在新体系结构下,振动、冲击和声学噪声遥测精度提高约5倍,测量动态范围扩大24 dB,数据压缩比分别为16∶1、69∶1、33∶1,达到了有效压缩环境数据的目的并提高了其遥测精度。

With the rapid growth in the amount of environmental data from launch vehicle, it is a key problem to send them to the ground station by the present wireless communication system. A new launch vehicle telemetry system scheme with an independent sub-system of environmental measurement is designed, which could analyze environmental data on rocket and then sends analysis results instead of original measurement data to the ground station during the flight tests. And a method the error-accumulation problem caused by calculating of overlapping data segmentation is presented for solving the shock response spectra during the whole flight. Besides, the rocket-borne optimal process parameters of the acoustic noise, shock and vibration are obtained by simulation combined hardware resources and system capacity. Lastly, a rocket-borne processor is developed. Flight tests show the shock, vibration and acoustic noise measurement accuracy is improved about 5 times and the dynamic range of measurement is expanded 24 dB, and moreover, data compression ratios are about 33：1, 69 ： 1, 16 ： 1 respectively.