Analysis of the Non-smooth Dynamical Effects and Suitable Operation and Control Strategies for Digital Displacement Units
| Autor: | Niels Henrik Pedersen, Per Johansen, Torben Ole Andersen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Pedersen, N H, Johansen, P & Andersen, T O 2019, Analysis of the Non-smooth Dynamical Effects and Suitable Operation and Control Strategies for Digital Displacement Units . in Proceedings of 10th Workshop on Digital Fluid Power . Johannes Kepler University Linz, The 10th Workshop on Digital Fluid Power, Linz, Austria, 28/02/2019 . Aalborg University |
| Popis: | Newly emerging digital hydraulic pump-motor units enable high efficient operation and thereby span widely with respect to potentially application use. The digital displacement machine (DDM) provides four-quadrant operation at lower losses compared to conventional fluid power machines, due to the possibility of activating/deactivating individual pressure chambers. However, its non-smooth digital effects introduces pressure oscillations and complicates the control system development. This possibly explains why most state-of-the-art control strategies neglects the transient machine behavior when synthesizing controllers for the actuated plant. Since the dynamical behavior and control performance is greatly dependent on the chosen operation strategy and rotational speed of the machine, this paper identifies how the suitable operation and control strategy changes as function of the rotational speed. The paper shows that the DDM dynamics should only be neglected for a machine with a relatively high number of cylinders, relatively high displacement operation and if the rotational speed of the DDM is significantly faster than the plant dynamics. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|