Abstract
Hydraulic switching control is an opportunity for economic, robust and energy efficient hydraulic motion control. The hydraulic buck converter represents a promising concept, which meets these requirements. Part I of this publication has shown, that for a convenient control performance a model based control should be applied. In this paper a flatness based controller for linear hydraulic motion control with a sub kilowatts hydraulic buck converter
is presented. A simple model based on an averaging of the switching converter is employed to derive a flatness based controller combined with a nonlinear observer to estimate all system states only from a position signal. Its performance is studied by simulations and
experiments for large ramp type and sinusoidal motions of a heavy mass. Comparison of motion quality and energy consumption are made between the converter and a standard hydraulic proportional drive using a servo-valve instead of the switching converter. With
this flatness based controller a tracking performance as good as of a proportional drive can be achieved, yet at much better efficiency. Proportional control for the switching converter, however, leads to inferior results for this type of intended motions.
| Original language | English |
|---|---|
| Pages (from-to) | 818-828 |
| Number of pages | 34 |
| Journal | Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Eng. |
| Volume | 229 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Mar 2015 |
Fields of science
- 203015 Mechatronics
- 102009 Computer simulation
- 203013 Mechanical engineering
JKU Focus areas
- Mechatronics and Information Processing
