TY - JOUR
T1 - Fundamental performance limitations for a class of electronic two-stage proportional flow valves
AU - Prasetiawan, E.
AU - Zhang, R.
AU - Alleyne, A.
PY - 2001
Y1 - 2001
N2 - This paper examines the dynamics of a popular type of two-stage flow control valve currently seeing increased usage in electrohydraulic systems. This particular component has the trademarked name: 'Valvistor.' While several benefits do exist, there are limitations to the closed loop performance of the valve when it is included in a valve-controlled electrohydraulic system. An attractive feature of this two-stage valve is that the pilot flow can also contribute to the total flow giving higher steady state flow efficiency. However, for dynamic performance this structure results in zeros in the open loop transfer function, which will limit the closed loop bandwidth of a flow control system. This paper presents an analytical model of this particular type of valve and derives the presence of the inherit system zeros. A model simplification is also presented which clearly illustrates the performance-limiting zeros. In addition, identification results on a testbed are presented to give the model and the analysis the necessary experimental validation.
AB - This paper examines the dynamics of a popular type of two-stage flow control valve currently seeing increased usage in electrohydraulic systems. This particular component has the trademarked name: 'Valvistor.' While several benefits do exist, there are limitations to the closed loop performance of the valve when it is included in a valve-controlled electrohydraulic system. An attractive feature of this two-stage valve is that the pilot flow can also contribute to the total flow giving higher steady state flow efficiency. However, for dynamic performance this structure results in zeros in the open loop transfer function, which will limit the closed loop bandwidth of a flow control system. This paper presents an analytical model of this particular type of valve and derives the presence of the inherit system zeros. A model simplification is also presented which clearly illustrates the performance-limiting zeros. In addition, identification results on a testbed are presented to give the model and the analysis the necessary experimental validation.
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U2 - 10.1109/acc.2001.946280
DO - 10.1109/acc.2001.946280
M3 - Conference article
AN - SCOPUS:0034841982
SN - 0743-1619
VL - 5
SP - 3955
EP - 3960
JO - Proceedings of the American Control Conference
JF - Proceedings of the American Control Conference
T2 - 2001 American Control Conference
Y2 - 25 June 2001 through 27 June 2001
ER -