A study on performance of electro-hydraulic load simulator based on pressure servo valve

The extra torque of electrohydraulic load simulator loading system affects its performance seriously. To eliminate the extra torque, the pressure servo valve control load simulator is proposed. This article establishes the electro-hydraulic load simulator mathematical model based on flow servo valve and pressure servo valve, analyzes the mechanism of overcoming extra torque load and simulation, provides the evidence of designing and selecting servo valve used in the passive electro-hydraulic load simulator to overcome the extra torque and improve system performance.