Verification experiment on dynamic modeling of leveling system of paddy field laser leveler

Dynamic Modeling is one of the most effective ways to show dynamic characteristics of mechanic-hydraulic system.It is always used in high presion control of the moving part, especially in high speed. However, it must be verified before used in controller designing.This paper pays much attention to verification test on dynamic modeling of leveling system of paddy field laser leveler.The test conditions was more rigorous than before, which can ensure the accuracy of modeling . The verification test was based on that dynamic modeling was established by group before and modeling was tested simply, which showed the accuracy of modeling.In this paper a experimental platform was designed and built, which was close to the model assumptions.The platform should firstly provide a stable platform installation for the physical system of shovel.Secondly it should have proportional flow valve.Last but not list, The clearance between the hinge should be small.Then carried out the test, which mainly included two parts.First was the calibration of flow gain coefficient of proportional flow valve through constant current input and sinusoidal input test.Measured the electric current and flow rate data at same time,then propose them by Matlab.Second, sine vibration test for the physical system of shovel through inputing different frequency and amplitude of the input current by control circuit to the physical system of shovel.Then Comparing the ground level obliquity Angle measurement results with the simulation results which happened in same condition.The test results showed that the ground level obliquity, compared with the results of simulation model could response the leveling system dynamic characteristics.This paper can be useful in these terms.First, it lays foundation for perfecting the leveling system structure in future and realizing the leveling control algorithm based on dynamic model foundation.Second, the calibration method of the proportional valve flow gain coefficient can be reused to figure out the parameter of the proportional valve flow gain coefficient.Last but not list, the scheme of system model validation for dynamic modeling of other integrative technique of mechanics-electronics-hydraulics equipment validation also can be used and be referenced.