Abstract
The digital testing technique based on computers for dynamic characteristics of electrohydraulic servo-valves via frequency scan method is researched. The no-load piston that measures the servo's transient output flow is designed properly. The velocity testing method, by which the speed signal can be obtained indirectly by means of a piezoelectrical accelerometer, is given. High speed sampling is realized in Windows OS. Wavelet denoising and Fourier transform are adopted in data processing and analysis. The testing technique is applied to actual testing systems and the experimental results are proved.
| Original language | English |
|---|---|
| Pages (from-to) | 357-361 |
| Number of pages | 5 |
| Journal | Journal of Beijing Institute of Technology (English Edition) |
| Volume | 12 |
| Issue number | 4 |
| Publication status | Published - Dec 2003 |
Keywords
- Electrohydraulic servovalve
- Frequency response
- Frequency scan
- No-load piston
- Wavelet transformation