Power Transmission by Low‐Compressibility Fluids
Marc Budinger, Ion Hazyuk, Clément Coïc · 2019
This chapter introduces the modeling of power transmission systems by low-compressibility fluids that are often referred to as incompressible. It gives the guiding example of an actuation system of the primary flight controls of a helicopter. The chapter deals with exercises and problems that illustrate the use of these models and the creation of their equivalents in Modelica language for other hydraulic applications. Fluid Power applications use pressurized hydraulic fluid, generally to perform mechanical work. The minimal modeling of the fluid depends on the considered physical phenomena. Relying on physical phenomena, the bond graph approach is well suited to the description of the fluid model. A bond graph model enables a clear representation of the physical phenomena modeled for each component or system. When at rest, hydraulic fluid is stored in one or several dedicated reservoirs. Fluid pressure in the reservoir is either equal to atmospheric pressure or the resultant of a pressurization mean.