Research On The Vehicle-guideway-coupled Vibration Control Considering The Relative Position Between The Vehicle And The Guideway

The vehicle-guideway-coupled vibration is a complex problem in the research of the maglev vehicle. The engineering tests show that the change of the relative position between the vehicle and the guideway and some other factors may cause the vehicle-guideway-coupled vibration. At the present time, single-long-span guideway and multi-short-span guideway are mainly used in the EMS systems, and are so different in the forms of vibration that need to be discussed separately. Theoretical research and simulation study were made considering the two different guideways on the vehicle-guideway-coupled vibration caused by the relative position between the vehicle and the guideway and some other factors, which would help to solve this problem in the view of suspension control. The main work of the paper could be organized as below.Firstly, a method calculating the electromagnetic force considering the elasticity of the guideway based on the equivalent gap was introduced, and the accuracy of this method was tested by the finite element simulation. With this method, the dual-suspension-point vehicle-guideway-coupled model in condition of the single-long-span guideway and the multi-suspension-point vehicle-guideway-coupled model in condition of the multi-short-span guideway were built, and the state feedback controllers of the models were designed.Secondly, based on the dual-suspension-point vehicle-guideway-coupled model, the effects that the feedback coefficients, the guideway parameters and the relative position between the vehicle and the guideway made on the stability of the elevation system were analyzed. Then a comparison was made within different models in condition of the single-long-span guideway.Thirdly, based on the multi-suspension-point vehicle-guideway-coupled model, analyses were made on the effect that the relative position between the vehicle and the guideway made on the stability of the elevation system. When the guideway is short-spanned, the gap information measured by the gap sensor could not well reflect the gap between the guideway and the vehicle, so the relative position between the vehicle and the guideway would badly affect the stability of the elevation system. Simulation showed that if the gap differential information was introduced to the state feedback controller which was composed by the gap information measured by the gap sensor, the electromagnet velocity signal and the current signal, the adverse effect of the relative position between the vehicle and the guideway could be depressed.In conclusion, the research of this paper came from the engineering tests, and the vehicle-guideway-coupled vibration caused by the relative position between the vehicle and the guideway and some other factors was analyzed with theoretical research and simulation study. The result of this paper would help to verify the test phenomena and solve the vehicle-guideway-coupled vibration in the view of the suspension control, while it needs to be tested by further experiments.