Positioning and Stabilizing Of an Inertial System Subjected To Oscillatory Disturbance Using Electro- Hydraulic Control

AbstractIn this work, a control system for positioning and stabilizing a massiveinertial system subjected to continuous disturbances, which represents theoscillatory motion of the base, is investigated. A hydraulic system is proposed andsimulation is used to select and test the effect of different parameters of thehydraulic parts, particularly those of the electro hydraulic servo valve, atdifferent values of the supply pressure of the hydraulic fluid.The inertial system dynamics and the hydraulic parts are mathematicallymodeled and simulated by digital computer using (MatLab). The dynamiccharacteristics of the control system, such as the stability and the time response inaddition to the ability of the system to reduce the effect of the externaldisturbances are examined. The results show that the control system is capable ofreducing these effects between (70% to 90%) depending on the supply pressure ofthe hydraulic system and the frequency of the external disturbances. In addition,the effect of using pressure limit valve in the hydraulic system and that of thepresence of dry friction of a relatively high value, are investigated.Keywords: position control, hydraulic system, stabilization of inertial system,Electro-Hydraulic Control