Research Of Swivel Table And Scanning Frame Control System For Near-Field Measurement

This thesis is finished fOr the project "Theoretical design and engineeringactUalization of swivel table and scanning frame control system for antenna nearfieldmeasurement" .The design way\ design developing stePs. control algorithIn andengineering actuaIization method of swivel table for near-field measurement andscanning frame control system are presented in this thesis.After retrospect the developing history of antenna near-field measurementtechnology and discussing the most update project five parts working was mainlyaccomplished: the design of swivel table control system; the design of stepmotor driver,the design of scanning frame control system; the algorithm for position control andevaluation for accuracy. The make-up of parts of hardware circuit and the workingtheory of the system is set forth in detail. The means, by which circle-figured pulsesproduced by Triphase Step-motor are finely assigned via GALl6V8 is especiallydiscussed, and the simulating computer program is done. The design of PWM seriesswitch power is also presented. The software is based on the demands of positioncontrol. A new obscure controller is realized. The new way can improve the PID controIperformance as well as anti-disturbing caPacity. At last, the swivel table systems, whichhave been realized in engineering, are evaluated, and the result data show that it reachesabsolutely the norms of system performance.