A dual EHA system for the improvement of position control performance via active load compensation
| Autor: | Seong-Ryeol Lee, Yeh-Sun Hong |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0209 industrial biotechnology
Engineering business.industry 020209 energy Mechanical Engineering Response time Electro-hydraulic actuator 02 engineering and technology Piston rod Industrial and Manufacturing Engineering Active load Cylinder (engine) law.invention Compensation (engineering) Piston 020901 industrial engineering & automation Control theory law 0202 electrical engineering electronic engineering information engineering sense organs Electrical and Electronic Engineering business Actuator |
| Zdroj: | International Journal of Precision Engineering and Manufacturing. 18:937-944 |
| ISSN: | 2005-4602 2234-7593 |
| Popis: | The dynamic response of a single-rod type EHA (electro-hydrostatic actuator) in the closed-loop control of piston position is inherently dependent on load directions due to the unequal piston areas of the rod-side and head-side. In particular, the response time of the extension and retraction of the piston rod changes significantly when the direction of the external load is changed. In this study, a dual EHA system is proposed, where a force-controlled double-rod type EHA was added to a single-rod type EHA to isolate it from external loads. Force signals for the force control were obtained by measuring the cylinder chamber pressures. The dual EHA system exhibited significantly improved position control performance, even when using basic proportional controllers. An expected collateral benefit is that the system may be reconfigured to a redundant system for fail-safe operation in the emergency case where the main position controlled EHA is malfunctioning. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink