Virtual Instrument Based On Electro-Hydraulic Servo Valve Test-Bed Design And Analysis Of Static And Dynamic Characteristics

According to enterprise commissioned, in order to test and maintenance the aging or failure hydraulic components,reference the best test-bed design theory of International and domestic, based on the needs of the enterprise,have developed servo valve test-bed. Based on the test-bed hydraulic testing centers, and its power supply and test system provided by the testing center, the center test platformer can test hydraulic components like hydraulic pumps, hydraulic motors, hydraulic cylinders, conventional valves, servo valves for general factory test.The article described the servo valve test-bed of the general design flow, including the design of the electro-hydraulic servo valve station,study out the schematic diagram of the electro-hydraulic servo valve test-bed,the design of the electro-hydraulic servo valve test-bed electrical system. Introduced the importance of the using of remote voltage regulator technology on test-bed.The article described the principle of electro-hydraulic servo valve and also analyze the static and dynamic characteristics of electro-hydraulic servo valve. Detailed analyzed the two test programs of dynamic test system, such as the text principle of frequency method and statistical methods, finally by comparison, analysis, educe the superiority of using statistical methods to text dynamic characteristics of electro-hydraulic servo valve.By analyzing the dynamic text system of electro-hydraulic servo valve test-bed, established dynamic mathematical model of test system, analysis of the impact of dynamic factors in the accuracy of the test system that is the natural frequency of servo-cylinder test systems for dynamic impact, and proposed to raise the natural frequency of servo-cylinder measures.Finally the article analyzed the measurement and control system of the electro-hydraulic servo valve test-bed, introduced the test-bed hardware structure, prepared using LabVIEW process measurement and control system. Also analyzed the anti-jamming measures to test system.Design and analysis of static and dynamic characteristics of the electro-hydraulic servo valve test-bed provides a theoretical basis for servo valve repairs, improved the business to electro-hydraulic servo valve fault diagnosis ability.