TY - JOUR
T1 - On using unstable electrohydraulic valves for control
AU - Krishnaswamy, Kailash
AU - Li, Perry Y.
PY - 2000
Y1 - 2000
N2 - High bandwidth, high flow rate electrohydraulic valves typically have two or more stages. Multi-stage valves are expensive, require meticulously clean fluid, and introduce higher order dynamics. Single stage spool valves are cheaper and more reliable. However, they are not suitable for high bandwidth, high flow rate applications due to limitations of the stroking actuators. In the paper, we investigate the feasibility of reducing this limitation by designing the valve to be openloop unstable. This can be accomplished by exploiting the transient flow forces. Simulation case studies indicate that the unstable valve provides faster response than the stable valve when stroking forces are limited. Moreover, the unstable valve tends to require less power and work to operate.
AB - High bandwidth, high flow rate electrohydraulic valves typically have two or more stages. Multi-stage valves are expensive, require meticulously clean fluid, and introduce higher order dynamics. Single stage spool valves are cheaper and more reliable. However, they are not suitable for high bandwidth, high flow rate applications due to limitations of the stroking actuators. In the paper, we investigate the feasibility of reducing this limitation by designing the valve to be openloop unstable. This can be accomplished by exploiting the transient flow forces. Simulation case studies indicate that the unstable valve provides faster response than the stable valve when stroking forces are limited. Moreover, the unstable valve tends to require less power and work to operate.
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M3 - Conference article
AN - SCOPUS:0034546382
SN - 0743-1619
VL - 5
SP - 3615
EP - 3619
JO - Proceedings of the American Control Conference
JF - Proceedings of the American Control Conference
T2 - 2000 American Control Conference
Y2 - 28 June 2000 through 30 June 2000
ER -