TY - GEN
T1 - On the energy efficiency of dual prime mover pump-controlled hydraulic cylinders
AU - Gøytil, Petter H.
AU - Padovani, Damiano
AU - Hansen, Michael R.
N1 - Publisher Copyright:
Copyright © 2019 ASME
PY - 2020
Y1 - 2020
N2 - This paper concerns the energy efficiency of a special class of pump-controlled hydraulic cylinders utilizing two prime movers. The performance of such circuits has been studied previously motivated by their capability of providing an actuator stiffness similar to that of servo valve-controlled systems. This characteristic may improve performance and robustness in applications requiring feedback control. In this paper, the presence of losses similar to that of fluid throttling, in the sense that they occur even in the absence of component inefficiencies, are demonstrated for such circuits and shown to degrade the overall energy efficiency of the system. The conditions under which such losses occur are derived analytically as a function of system parameters and operating conditions and two solutions for their elimination are proposed and verified analytically and numerically. Several implementation options are compared in terms of energy efficiency and component sizing and benchmarked to a conventional servo valve solution. It is shown that with the appropriate implementation, an energy efficiency up to ten times greater than that of a conventional servo valve system may be expected.
AB - This paper concerns the energy efficiency of a special class of pump-controlled hydraulic cylinders utilizing two prime movers. The performance of such circuits has been studied previously motivated by their capability of providing an actuator stiffness similar to that of servo valve-controlled systems. This characteristic may improve performance and robustness in applications requiring feedback control. In this paper, the presence of losses similar to that of fluid throttling, in the sense that they occur even in the absence of component inefficiencies, are demonstrated for such circuits and shown to degrade the overall energy efficiency of the system. The conditions under which such losses occur are derived analytically as a function of system parameters and operating conditions and two solutions for their elimination are proposed and verified analytically and numerically. Several implementation options are compared in terms of energy efficiency and component sizing and benchmarked to a conventional servo valve solution. It is shown that with the appropriate implementation, an energy efficiency up to ten times greater than that of a conventional servo valve system may be expected.
UR - http://www.scopus.com/inward/record.url?scp=85084163022&partnerID=8YFLogxK
U2 - 10.1115/FPMC2019-1642
DO - 10.1115/FPMC2019-1642
M3 - 会议稿件
AN - SCOPUS:85084163022
T3 - ASME/BATH 2019 Symposium on Fluid Power and Motion Control, FPMC 2019
BT - ASME/BATH 2019 Symposium on Fluid Power and Motion Control, FPMC 2019
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME/BATH 2019 Symposium on Fluid Power and Motion Control, FPMC 2019
Y2 - 7 October 2019 through 9 October 2019
ER -
