Abstract
The Linear Digital Hydraulic Amplifier is a modification of the classical linear hydraulic amplifier. It employs a finite number of hydraulic cylinders which are connected to high or low pressure depending on the force requirements. The control is accomplished only by mechanical and hydraulic components. Since a digital cylinder drive without closed centre valves can only realize discrete force values, a load force between these discrete force levels cannot be compensated statically but requires a periodic switching of the system leading to oscillations around the intended rest position and permanent energetic losses. In this paper two concepts for stabilizing the rest position employing check valves are studied. With these a rest position can be held stably in principle. In combination with position control, however, a complex stability problem occurs with complex stability boundaries in the parameter space.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the Fifth Workshop on Digital Fluid Power - DFP12, Tampere Finland |
| Editors | Arto Laamanen and Matti Linjama |
| Pages | 89-102 |
| Number of pages | 14 |
| Publication status | Published - Oct 2012 |
Fields of science
- 203013 Mechanical engineering
- 203 Mechanical Engineering
- 203015 Mechatronics
- 102009 Computer simulation
JKU Focus areas
- Mechatronics and Information Processing