Design and implementation of detection system for active vibration isolation loads based on FPGA
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.
active vibration isolationFPGAreal-time telemetrymulti-channel samplingPID control
万方数据
维普
