This paper studies the dependency of the total efficiency of a multiple actuation hydraulic system on the operating conditions as well as on the control strategies applicable to control valves. In particular, with respect to the parallel connection among hydraulic actuators managed by proportional control valves, a general structure of the functional relationship correlating the hydraulic power provided by the supply unit and the mechanical power exerted by actuators is proposed and used to determine the operating point and the system overall efficiency. Afterwards, the dependency of the system behavior on external load variations and on valves control is assessed, and the influence of a modification of the operating conditions on the overall efficiency is highlighted. Finally, the validity limits of some compensating corrections are determined.
A Theoretical Analysis about Multiple Actuation Systems Efficiency / Franzoni, Federica; Milani, Massimo; Montorsi, Luca. - In: SAE TECHNICAL PAPER. - ISSN 0148-7191. - STAMPA. - --:(2008), pp. -----. ( SAE 2008 Commercial Vehicle Congress and Exposition Rosemont, IL, usa 5-8 October, 2008) [10.4271/2008-01-2677].
A Theoretical Analysis about Multiple Actuation Systems Efficiency
FRANZONI, Federica;MILANI, Massimo;MONTORSI, Luca
2008
Abstract
This paper studies the dependency of the total efficiency of a multiple actuation hydraulic system on the operating conditions as well as on the control strategies applicable to control valves. In particular, with respect to the parallel connection among hydraulic actuators managed by proportional control valves, a general structure of the functional relationship correlating the hydraulic power provided by the supply unit and the mechanical power exerted by actuators is proposed and used to determine the operating point and the system overall efficiency. Afterwards, the dependency of the system behavior on external load variations and on valves control is assessed, and the influence of a modification of the operating conditions on the overall efficiency is highlighted. Finally, the validity limits of some compensating corrections are determined.
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