Proportional electro-hydraulic valves: from analogue to digital control
| Autor: | Wilber Acuna Bravo, Marco Agostani, Enrico Canuto, Marco Bonadei |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Engineering
proportional valve business.industry Bandwidth (signal processing) Computational Mechanics Regulator electrohydraulics hierarchy digital control Industrial and Manufacturing Engineering Computational Mathematics position control Artificial Intelligence Control and Systems Engineering Control theory Nyquist–Shannon sampling theorem Digital control Electrical and Electronic Engineering Hydraulic machinery business Actuator Position sensor Inner loop |
| Zdroj: | International Journal of Mechatronics and Automation. 4:93 |
| ISSN: | 2045-1067 2045-1059 |
| DOI: | 10.1504/ijma.2014.062336 |
| Popis: | Proportional electro-hydraulic valves are ubiquitous as flow actuators in hydraulic systems. Flow regulation is the result of the accurate positioning of a spool driven by a solenoid and a position sensor. The overall control consists of two hierarchical loops: the inner loop is the solenoid current regulator with a closed-loop bandwidth close to 1 kHz. A model-based digital regulator of this kind has been presented elsewhere. The outer loop is a position tracking control, in charge of an accurate positioning of the spool with respect to the valve openings. The paper addresses the outer loop and concentrates on the conversion of an existing industrial analogue controller into a digital one. The analogue controller is a non-linear proportional, integrative and derivative controller including a second-order derivative, and is capable of recovering a dead-band hysteresis. The digital conversion provides the necessary position derivatives through a state predictor, in order to withstand the 5-kHz Nyquist limi... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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