A Demodulation Method of Differential Circular Inductor Synchronizer

Abstract

The invention discloses a demodulation method of a differential circular induction synchronizer. Each cycle of the electric angle in the value interval and each cycle of the main value interval electric angle of the fine channel are compensated and corrected synchronously, and the corrected main value interval electric angle of the coarse channel and the main value interval electric angle of the fine channel are obtained; according to the corrected The electrical angle of the main value interval of the coarse channel and the electrical angle of the main value interval of the fine channel obtain the second mechanical angle; according to the preset conditions, judge the electrical angle of the main value interval of the corrected coarse channel and the main value interval of the corrected fine channel Whether the electrical angle is adjacent, the cycle number of the fine channel electrical angle is obtained according to the judgment result and the second mechanical angle; the third mechanical angle is obtained according to the cycle number of the fine channel electrical angle and the corrected main value interval electrical angle of the fine channel. The invention improves the measurement accuracy of the mechanical angle.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a demodulation method of a differential circular induction synchronizer. Background technique [0002] In the high-precision control moment gyroscope and turntable control system, the angle measurement system is a key component. The circular induction synchronizer is an electromagnetic induction sensing element used to detect the mechanical rotation angle. It is essentially a planar winding multi-pole resolver. Due to a series of advantages such as small size, light weight, impact resistance, radiation resistance, and high vacuum resistance, it has been widely used in harsh environmental conditions, and its application in aerospace has become more prominent in recent years. Traditional inductosynchronizers usually have two sets of windings, which are independent of each other, and are generally called coarse channel and fine channel; the fine channel has multiple pairs of poles,...

AI Technical Summary

Problems solved by technology

Traditional inductosynchronizers usually have two sets of windings, which are independent of each other, and are generally called coarse channel and fine channel; the fine channel has multiple pairs of poles, and the accuracy can reach the order of arc seconds; Angle-graded and unique null easily affected by temperature

In order to overcome this shortcoming, a differential circular induction synchronizer came into being. Its biggest advantage is that the zero position of the coarse and fine channels is not affected by temperature, and the accuracy of the coarse channel can also reach the order of arc seconds, but the coarse channel is not like the traditional The type inductive synchronizer has only 1 pair of poles, and it is also multi-pole, usually only 1 pair of poles less than the fine channel, so the coarse channel cannot use it to directly determine the number of cycles, it also needs the angle data of the fine channel, through the coarse and fine channel The angle data of the channel is calculated to obtain its cycle number. After the cycle number is obtained, it is combined with the fine channel data to obtain the mechanical absolute angle. In addition, due to the processing technology of the rough and fine channels, it is impossible to ensure that the rough and fine channels are strictly linear, resulting in The combined mechanical angle is not continuous, smooth, or even has periodic jumps, which results in a decrease in the performance of the servo control system, or even out of control. Therefore, the coarse and fine channels must be corrected, and when combining the mechanical absolute angle data, it is necessary to It is determined according to whether the coarse and fine data are "adjacent", so it is necessary to design a demodulation or solution method based on a differential circular induction synchronizer

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