In this paper flow rate signal and spool displacement signal were adopted to investigate the bandwidth frequency of servo valve. Spool displacement and flow rate dynamic response experiments on different input signal and hydraulic pipe diameter were i...
In this paper flow rate signal and spool displacement signal were adopted to investigate the bandwidth frequency of servo valve. Spool displacement and flow rate dynamic response experiments on different input signal and hydraulic pipe diameter were implemented. The spool displacement dynamic response remains stable throughout, so it can be received accurately reflects the authentic performance of servo valve. Meanwhile the flow rate signal is easy disturbed by hydraulic environment and deviate from the spool displacement signal in small input signal and phase lag.