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Modeling and Simulation of Hydraulic System for Translational and Rotational Motion

The main focus in this paper is on modeling and computer simulations of hydraulic systems for achieving a linear or rotary actuator motion, which are mostly used for high-power industrial applications. The hydraulic servo systems are very important systems for control applications because they take the advantages of both the large output power of traditional hydraulic systems and a high servo control response of electric systems. A nonlinear dynamic model for both translational and rotational motion of hydraulic actuator has been derived, which can be used in simulation studies of dynamic behavior of system and for advanced controller design. The hydraulic control system model has been derived as coupled sets of nonlinear algebraic and differential equations, which includes the main phenomena of physical system. This form of modeling equations has been resulted in a block-oriented system model. The simulation model includes the flow and force equations necessary to describe dynamic behavior of the control system and allows the prediction of performance of hydraulic system through computer simulation. A simulation model depicting the two control systems has been built, which may be used for an easy comparison of dynamical behavior of common hydraulic systems in industry. The model also contains several important dynamic characteristics those substantially influence the performance of the system within the operation range. Model development and preliminary experimental testing on laboratory setup are in progress.

Hydraulic system; Mathematical model; System simulation

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