| Brake inertial platform is one of the main test equipments which test automobilebrake performance. According to the latest electric simulation technology, and use thecontrol mode of asynchronous motor vector frequency conversion, design amechanical and electrical combining simulation test bench which has the function ofelectric simulation. Compared to the traditional mechanical simulation test bench,this bench takes the large improvement in the performance, which first realized theelectric simulation function based on the AC motor drive.1.adds the electric simulation function to brake inertial platform.Because ofmature technology, reliable performance, the traditional mechanical simulationinertial platform is widely applied in practical production, however the test bench hastwo inherent defect: first, it completely dependent on mechanical flywheel simulationcar inertia, as result of the mechanical flywheel is very larger,it’s hard to adjust to thesize of inertia. Secondly it is the test bench improves inertia simulation accuracydepend more on the flywheel, this increases the cost of the test bench and thedifficulty of the design and manufacture. Electric simulation technology can improvethe two faults, so this paper selects to design the test bench which has the function ofelectric simulation inertia. Article talk about basic principles of electrical simulationtechnology, mathematical model of the electrical simulation, access to industrystandards and related information to determine the bench basic parameters, referenceto the mechanical simulation to gives a method for determining number and inertial ofmechanical flywheel in electromechanical hybrid simulation inertia bench. inertiasimulation range of combination system of mechanical inertial and electricalsimulation inertia.2.This test bench adopts AC motor drive and vector frequency conversiontechnology. AC motor relative to the DC motor has many advantages, such as lowcost, fast response, however, due to the difficult control, limiting the use of it. Vector frequency conversion technology is the advanced motor control technology developedin recent years, it greatly enhances the asynchronous motor speed control performanceand make it close to and even more than the dc motor control effect. This paperapplies the vector frequency conversion technology to inertial platform, can improvethe control effect of the test bench electric simulation function and improve test benchsimulation accuracy. Motor is controlled by the inverter, the article describes thebasic principles of the frequency vector control technology, according to the selectionprinciple of the inverter, choosed the inverter for this bench, in addition, the articlealso describes the peripheral devices of inverter.3. Reference to the traditional mechanical simulate inertial bench, design thebasic structure of the inertia bench, the paper also briefly introduces the keytechnologies and the main function used in the bench.4.Writing this paper is based on design process of the JF122D car brake inertialplatform, finally, this platform is completed at mechanical and electrical equipmentinstitute of Jilin university, and through the experiments to verify its performance is tosatisfy the test standard requirements, and the simulation accuracy is much higherthan the traditional mechanical simulation inertial platform.This paper provides the precious experience for the design of mechanical andelectrical combining simulation test bench, have the important meaning to test benchdevelopment. |
