基于FPGA的主动隔振载荷检测系统的设计与实现  

Design and implementation of detection system for active vibration isolation loads based on FPGA

作　　者：金奇益 谢永 贾建军[1,2] Jin Qiyi;Xie Yong;Jia Jianjun(Key laboratory of Space Active Opto-Electronics Technology,Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Shanghai 200083,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院上海技术物理研究所空间主动光电技术重点实验室,上海200083 [2]中国科学院大学,北京100049

出　　处：《电子测量技术》2024年第4期165-171,共7页Electronic Measurement Technology

基　　金：国家重点研发计划(2022YFC2203701)项目资助。

摘　　要：随着空间精密载荷对星上振动要求的提高,主动隔振载荷在对敏感载荷进行微振动抑制方面的重要性逐渐凸显。为实现低频、小振幅微振动的采集和抑制功能,以满足载荷所需的振动环境要求,本文设计了一个基于FPGA主控板卡和Qt上位机软件的检测系统。通过FPGA控制多路Δ-Σ模数转换器完成微振动信号的同步采集、指令协议的解析、PID控制算法的实现以及驱动控制信号的输出,同时设计了上位机软件实现对遥测信号的实时数显和频谱分析。系统经过集成联调,对主动隔振载荷的实时遥测功能和隔振控制性能进行了测试。结果表明,加速度幅度谱密度积分从1.73×10^(-6) g降至1.41×10^(-7) g,隔振抑制比达到-25 dB,实现了良好的微振动抑制效果,验证了本系统能够满足主动隔振载荷的微振动抑制需求。As space precision loads increasingly require on-board vibration,the importance of active vibration isolation loads in suppressing micro-vibrations of sensitive loads has gradually become more prominent.In order to realize the collection and suppression of low-frequency and small-amplitude micro-vibrations to meet the vibration environment requirements required by the load,this paper designed a detection system based on FPGA main control board with Qt host computer software.FPGA is used to control multiple Delta-Sigma ADC to complete the synchronous collection of micro-vibration signals,analysis of command protocols,implementation of PID control algorithms and output of drive control signals.At the same time,real-time waveform plotting and spectrum analysis of load acceleration signals are implemented through software.After integrated joint debugging,the system tested the real-time telemetry function and vibration isolation control performance of the active vibration isolation load.The results showed that the acceleration amplitude spectral density integral dropped from 1.73×10^(-6) g to 1.41×10^(-7) g,and the vibration isolation suppression ratio reached-25 dB,achieving a good micro-vibration suppression effect and verifying that this system can meet the needs of micro-vibration suppression.

关 键 词：主动隔振 FPGA 实时遥测 多通道采集 PID控制 

分 类 号：TP391.8[自动化与计算机技术—计算机应用技术]