Magnetic suspension bearing base theory research present situation and the analysis ( A)

In 1937, Ken pearl ( Kemper) Applied for the magnetic levitation technology patents, is the first practical idea of maglev technology. Since then, magnetic levitation technology research become a hot topic of the multinational. As materials science, electronic science, control theory, the development of the technology on the rotor dynamics, the basic theory of magnetic suspension bearing research 'constantly perfect at present, the research in this field abroad are active scientific research colleges and universities have the Swiss federal institute of technology, the university of Virginia in the United States, the university of Maryland, Berkeley, university of Texas, Austin at the university of Tokyo and chiba university of Japan. In enterprise face, relatively well-known in the international design and manufacture of magnetic levitating bearing company has: French S2M company ( Has been SKF) Swiss MECOS and IBAG, REVOLVE in Canada, Finland, Germany LEVITEC company of HIGH SPEED, OKBM in Russia, the United States NASA and Japan's seiko at home, such as scientific research in colleges and universities at present, tsinghua university, nanjing university of aeronautics and astronautics, wuhan university of science and technology, xi 'an jiaotong big science, shandong university, Shanghai university, national university of defense technology and shenzhen university and other colleges and universities in the research of magnetic suspension bearing. Among them, tsinghua university, mainly for magnetic suspension bearing in the application of high temperature gas cooled reactor research; Wuhan university of science and technology research is focused on the key technology of magnetic suspension high-speed hard disk; Nanjing university of aeronautics and astronautics has carried out on civilian and aviation with magnetic levitation bearing each key technology research and development, the magnetic suspension bearing with eddy sensor, controller, power amplifier, magneto bearing water mixed magnetic suspension bearing are studied. Shanghai university mainly for maglev high speed motorized spindle and the research of intelligent magnetic suspension bearing, the rest of the schools also have their own research priorities. YuLie in addition, xi 'an jiaotong university, wuhan university of science and technology Hu Ye hair has published the 'controllable magnetic suspension rotor system the basic theory and application of magnetic suspension bearing' two books, for magnetic suspension bearing of domestic research provides the theoretical basis of the system. Below according to the magnetic suspension bearing of several major, says related basic theories and research status, 1) The development history of controller technology controller and analog controller and digital controller in two stages. Simulation controller hardware circuit is used to realize logic control, is characterized by fast response, but the parameter adjustment difficulty, can change flexibly according to the control algorithm and hardware structure. Digital controller to meet with the requirement of real-time control speed digital signal processor ( DSP) Or other high speed digital device decommissioning, execute the realization of the control algorithm. Digital controller design flexibility, can be programmed to achieve a variety of control method. At present, digital controller has been completely replace the analog controller has been widely used.