Abstract
Advanced transportation systems using magnetical levitated vehicles are presently being developed. This paper is based on the use of thyristor-fed synchronous longstator drive, for which the adaption of the favourable field-oriented control to linear motors is briefly outlined. The apparent problem of precisely measuring the relative position of the vehicle on-board field can be solved by means of position detection equipment. Then the position value can also be used as a basis for the control system, Once provided with this information, a disturbance and state observer produces the remaining mechanical variables. Demands made on performance and constraints of transport operation are met by a cascaded state feed-back control design for the vehicle motion. A special state feed-back position control ensures a quick but smooth halt. Both control and observation of the mechanical variables are realized entirely digitally by a double microcomputer system, which has been tested successfully in cooperation with the position detector mounted on a large rotating test bench as a maglev vehicle simulator.
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