Drive control method and system for large-caliber telescope arc motor

Abstract

The invention relates to a drive control method and system for a large-caliber telescope arc motor. A DSP (Digital Signal Processor) event manager outputs six paths of drive signals; the six paths of drive signals are output to an intelligent power module after being subjected to optocoupling isolation; the intelligent power module outputs three paths of UVW voltage signals which are approximate to a circular magnetic field and the three paths of UVW voltage signals are added to an arc motor; a current mutual inductor measures each path of current; the current is input into a DSP buffer serial port for processing after subjected to A/D (Analog-to-Digital) conversion; a CPLD (Complex Programmable Logic Device) is used for processing an increment position signal generated by a coder and finishing interfaces of keyboard display, and the like; a rough and fine combined rotating transformer outputs an absolute position signal of the arc motor after passing through a digital converter; the signal is combined with the increment position signal processed by the CPLD to confirm the precise mechanical position of the arc motor; and motor phase conversion is realized after DSP processing. The invention can meet the requirement on a large radio telescope for a super-low speed arc motor and realize long time, super low speed, wide speed regulation and high precision tracking of a large-caliber millimeter wave/submillimeter telescope to a celestial body and has no creeping phenomenon at low speed.

Description

technical field [0001] The invention relates to a motor drive control method and device, in particular to a direct drive control method for azimuth axis and height axis arc motors of a large-diameter millimeter-wave / submillimeter-wave telescope, and using the method to drive a large-diameter millimeter Direct-drive controls for the azimuth and altitude axes of a 1 / 2-wave / submillimeter-wave telescope. This invention is a national key fund, and the approval number is 10833004. Background technique [0002] Astronomical telescope The telescope mainly collects faint radiation from celestial bodies, and concentrates 80% of the light energy it collects in a certain angle range of the primary mirror, so this puts forward extremely high requirements for the movement mode of the telescope and the tracking accuracy of the telescope. Require. Among the various motion modes of the telescope, the tracking motion is the most demanding and most important motion, because the pointing and ...

AI Technical Summary

Problems solved by technology

[0006] For large astronomical telescopes, the biggest disadvantage of direct drive is that it needs to be customized, the development cost is high, and the development cycle is correspondingly lengthened.

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