Structure Optimization And Suspension Control Technology Research Of Linear Electromagnetic Drive And Application

Linear electromagnetic drive technology is a kind of electromagnetic suspension and guide drive system with no contact.This technology is used in the aspect of structure vibration to resist seismic action.Gyroscope has the characters of fixed axis and precession,widely applied to maintain the balance of the object.Based on the gyro and linear electromagnetic drive technology,this paper designs the structure of the gyro stabilization system driven by linear electromagnetic and makes the further study on the linear electromagnetic drive structure and the levitation control of this structure.The focus of the thesis includes linear electromagnetic drive structure scheme selection,the simulation optimization on structural parameters,structure modeling,suspension modeling and simulation.The first chapter mainly introduces the types and applications of the gyroscope.With comprehensive analysis of the research on the structure design,the dynamic characteristics,the dynamics and the sensitivity analysis of the gyroscope,this chapter puts forward the research contents by considering the safety and the stability.The second chapter analyzes the principle and application driven by linear electromagnetic drive AMD,the structure of the gyro stabilization system driven by linear electromagnetic as well as the choice of linear electromagnetic driving structure scheme.Set up three different types of 3D model of the winding.The different schemes of winding way were simulated with the way of the control variables through MAXWELL magnetic simulation finite element software.By comparing the magnetic size,magnetic uniformity,magnetic field lines and the dynamic mass force in x,y directions,the first scheme was the optimized object.The third chapter optimizes the structure parameters of first scheme selected in the previous chapter.The scheme of winding way determined was optimized by establishing two dimensional model from the aspect of the structure parameters,such as the iron core thickness(tooth,tooth core width),cross-sectional area and position of the excitation coil,mass thickness and the suspended clearance.By comparing the magnetic size,magnetic uniformity,magnetic field lines,the dynamic mass force in magnetic field to make the optimal parameter selection,Simulation results show that when the parameter selections are 20mm thickness of iron core,and the coil section up,8mm×20mm area,20mm thickness of AMD mass,15mm distance of suspended clearance,the comprehensive effect is best.These will be the structural parameters of the electromagnetic drive.The forth chapter established the dynamic model of the linear electromagnetic drive suspension structure and suspension control.To analyze the forced state of the linear electromagnetic driving suspension structure,this chapter obtains the dynamic equation.Combined with voltage loop equations of the current electromagnetic coil,nonlinear system is converted to the linear system.This chapter using traditional PID method,the state feedback design method and sliding mode control designed a control system to control the suspended clearance in order to obtain the state equation and system block diagram.The fifth chapter simply analyses the role of SIMULINK software.Selecting the appropriate parameters k1,k2,k3 and t1,t2,t3,the results of the suspension control simulation and clearance were carried out with SIMULINK tool based on the system block diagram,obtaining the state output wave diagram and comparing the suspended clearance wave diagram.The clearances of three methods are h<0.6mm,-0.05mm<h<0.05mm and h?0.028mm.The design of suspension control is realized.Through the comparison of these methods,the design method based on sliding mode control is more stable and of small oscillation,which is more suitable for linear electromagnetic driving suspension control.The sixth chapter analyzes the system control strategy,working principle and application of this system.Combined with gyroscope dynamics model of the gyro stabilization system,the linear electromagnetic drive structure is applied to two-wheels electric vehicle successfully which is the purpose of this study and creates a new security balance electric vehicles and explains its working principle in different conditions as well as the application of the system on the ship.The seventh chapter is a brief summary and put forward the key technology to further study.The author makes a prospect of this paper.This paper through selecting good structure program and influential structural parameters obtained a set of good parameters and achieve the goal of structural optimization.On the study of linear electromagnetic drive suspension control technology,the simulation results show that the sliding mode control based on feedback linear method is more suitable for linear electromagnetic drive suspension control.This method can more effectively reduce suspension oscillation and improve the stability of the suspension.The optimization of structural parameters and suspension control technology research improve the performance of the gyro stabilization system from a certain extent.