Application of error compensation technology for positioning precision of hydrostatic rotary table based on UMAC

Ye, Sen; Gao, Weiqiang; Liu, Jianqun; Yuan, Juan

doi:10.1109/iaeac.2017.8054187

Cited by 3 publications

(1 citation statement)

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“…Turntable bearings are often paired with sensors to form a closed-loop system for high-precision position control and feedback. At present, sensors and turntable bearings are used together to build up the terminal measurement system of closed-loop detection in two ways: (a) an independent sensor is mounted coaxially with the measured bearing (Ibaraki et al, 2013; Ye et al, 2017); and (b) utilizing the rotating characteristics of the turntable bearing, the position of the bearing is detected by sticking a band or strip sensor on the cylindrical surface of bearing end cover and installing a probe coaxially (AMO Automatisierung Messtechnik Optik GmbH, 2022; HEIDENHAIN, 2022; Schaeffler Technologies, 2016). For the first method, the installation space often limits its application, such as the hollow size of the turntable bearing and the mounting hole position of the sensor.…”

Section: Introductionmentioning

confidence: 99%

Parasitic time-grating angular displacement sensor for precision position measurement of turntable bearing

Wang

Qin

Chen

et al. 2023

Transactions of the Institute of Measurement and Control

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This paper proposes a parasitic time-grating angular displacement sensor for detecting the position of the turntable bearing. The sensor is mainly composed of probe, rotor, and supporting signal circuit. The probe consists of two separated measuring units on the left and right, and each measuring unit is composed of four sensing units with iron cores, excitation windings, and induction windings arranged according to specific rules. The rotor is made of sinusoidal isometric grooves based on the bearing end cover of the original turntable bearing. The signal processing circuit is used to filter, amplify, and compare the induction signal; meantime, it can generate the excitation signal. The high-frequency clock pulse signal is used as the measurement benchmark to realize the analysis of the position information of the induction signal. The structure and working principles of the sensor are presented in detail. Through the finite element method simulation, the feasibility of sensor scheme is verified, and the theoretical resolution of the prototype sensor is estimated to be about 1.33e−5. A sensor prototype is designed for testing, and the experimental results show that its accuracy can reach −0.003611° to 0.002583° in the range of [0°, 360°] after compensating the error point-by-point through the look-up table method.

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Section: Introductionmentioning

confidence: 99%