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Position forecasting apparatus and position detection apparatus

A technology of a prediction device and a detection device, which is applied in the field of position devices and can solve problems such as the reduction of prediction angle accuracy and the like

Active Publication Date: 2018-10-16
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to further delay due to processing by a filter circuit, etc., the sampling time to be predicted has to be further set in the future.
If the sampling time to be predicted is further set in the future in this way, the noise reduced by the filter circuit etc. will be amplified again and included in the predicted angle, so there is a problem that the accuracy of the predicted angle will decrease as a result.

Method used

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  • Position forecasting apparatus and position detection apparatus
  • Position forecasting apparatus and position detection apparatus
  • Position forecasting apparatus and position detection apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] about having image 3 and Figure 4 In the magnetic detection device 3 of the structure shown, the predictor 36 predicts the current sampling time T nRotation angle θ when Pn The prediction of , use MATLAB to simulate, and find the rotation angle θ Pn The noise contained in the predicted value of . In this simulation, the magnet 2 rotates at a constant speed of 10000 deg / sec, the sampling period of the detection unit 31 is 50 μsec, and the noise included in the rotation angle θ calculated by the arithmetic processing unit 33 is ±0.1 deg (refer to Figure 6 ), resulting in a group delay of 3 sampling times (150 μsec). In addition, the simulation unit 34 uses T n－4 Rotation angle θ when En－4 , Angular velocity ω En－4 and angular acceleration E n－4 The extrapolation process while simulating 3 sampling moments before T n－3 The rotation angle θ Sn－3 , the estimation unit 35 makes 3 samples before the time T n－3 The rotation angle θ n－3 Reflected in the rotation a...

Embodiment 2

[0089] Magnet 2 to 2 x 10 8 deg / sec 2 Perform isoaccelerated rotational motion, such as Figure 10 As shown, the noise contained in the rotation angle θ calculated by the arithmetic processing unit 33 increases as the speed increases. In the same manner as in the first embodiment, the rotation angle θ is obtained Pn The noise contained in the predicted value of . show the result in Figure 11 .

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Abstract

The present invention provides a position forecasting apparatus for forecasting the position at a predetermined time of a continuously operating moving body and a position detection apparatus comprising the position forecasting device. A position forecasting apparatus for forecasting a position at a predetermined time of a continuously operating moving body is provided with an estimation part thatfinds an estimated position state of the moving body at a time in the past before the predetermined time and a position forecasting part that forecasts the position of the moving body at the predetermined time based on the estimated position state of the moving body estimated by the estimation part.

Description

technical field [0001] The present invention relates to a device for predicting the operating position of an operating body and a device for detecting the operating position of the operating body. Background technique [0002] Conventionally, a position detection device is used that detects the position of the moving body by detecting a change in physical quantity caused by the rotational movement of the moving body such as a servo motor installed in a mechanical movable part of a machine tool or the like. The output of the position detection device continuously tracks the rotation movement of the moving body and feeds it back to the moving body, thereby controlling the movement of the moving body. [0003] As such a position detection device, a position detection device including a magnetic field generating unit that generates a magnetic field and a magnetic detection device is known. The magnetic detection device generally includes: a magnetic detection element that detec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/00G01B7/30
CPCG01B7/003G01B7/30G01D5/145G01D5/24495G01P3/487G01D5/16
Inventor 望月慎一郎
Owner TDK CORPARATION