A Round Inductosyn Measuring System Based on Quadrant Comparison and Adjustment Fusion Algorithm
Yuanwei Jiu, Ziyin Chen, Chenpeng Cui, Zhihong Liu · 2021 China Automation Congress (CAC) · 2021
Round inductosyn has been widely used in harsh industrial applications because of its strong adaptability to extreme environment. The traditional round inductosyn measuring method was not sufficient for getting the continuous absolute angle under severe temperature changes. A new fusion algorithm based on a resolver-to-digital converter hardware circuit is presented to adapt these conditions. In hardware, the circuit improves the measurement accuracy. In software, a fusion algorithm based on quadrant comparison and adjustment was presented. This method solves the trip point of the absolute angle caused by the zero deviation in coarse and fine channel, and can be easily applied to any round inductosyn with integer channel number. This measuring system can adapt to the variation of coarse data caused by the temperature changes. Experiment results show that the round inductosyn measuring system is correct and highly reliable, which can still obtain accurate absolute angle under strong interference.