火箭测试平台多通道脉动压力的同步采集与数据回收

目的实现火箭测试平台多通道脉动压力的同步采集与数据回收。方法在多时钟的采样系统内,采用统一的同步触发信号作为各通道的采样使能,实现40通道脉动压力的同步采集。采用"采存分离"的设计方法将存储电路从采样系统中分离,仅对存储电路进行抗冲击防护,通过火炮试验考核抗冲击性,通过回收存储电路实现数据回收。结果 40通道的采样同步精度被控制在了5个时钟周期内。存储体通过1000 m/s以上的冲击速度考核,数据全部回收。结论多时钟采样系统采用统一的同步触发信号可有效保证采样的同步性。在飞行载体弹舱空间受限的情况下,"采存分离"的方式可以在不增加体积和质量的前提下,极大增强数据记忆体的抗冲击能力,提高数据回收概率。

The Synchronizing Sample and Data Recovery for Multi-channel Fluctuating Pressure in the Rocket Test Platform

To realize the synchronous acquisition and data recovery of multi-channel fluctuating pressure in a rocket test platform,an unified synchronous trigger signal is used as the sampling enable signal in a multi-clock sampling system,realizing the synchronous sampling of pulsation pressure for 40 channels;a design,called“Seperation of the storage and the acquisition”,is adopted to separate the memory circuit from the sampling system.The memory circuit is only protected from the impact,which is assessed by the artillery test.The data recovery is realized through the recovery of the memory.As a result,the synchronous precision for sampling 40 channels is controlled in five clock cycles and the storage successfully passed the impact evaluation over 1000 m/s,recovering all stored data.Therefore,in a multi-clock sampling system,using the unified synchronous trigger signal can improve the synchronous precision effectively.In a flight vehicle where carrying space was limited,separating the function of acquisition and storage can greatly increase the anti-impact ability of storage without increasing the volume and weight,which can improve the probability of data recovery.