DSP-based high-precision and high-response decoding method of rotary transformer

A resolver and decoding method technology, which is applied in the field of decoding algorithms, can solve problems such as poor anti-interference, large memory usage, and high hardware requirements.

Inactive Publication Date: 2019-10-25
ZHONGBEI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of poor anti-interference, output lag, large memory occupation, and high hardware requirements in the current decoding algorithm, and provide a DSP-based resolver that can save costs, reduce decoding difficulty, and improve accuracy. High-precision and high-response decoding method

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  • DSP-based high-precision and high-response decoding method of rotary transformer
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  • DSP-based high-precision and high-response decoding method of rotary transformer

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Embodiment Construction

[0066] The specific embodiments of the present invention will be described in detail below with reference to the drawings

[0067] Such as figure 1 As shown, the present invention is a high-precision and high-response decoding method for resolver based on DSP. The process is through DSP's own PWM modulation, DSP is referred to as Digital Signal Processor (Digital Signal Processor), and PWM is referred to as multiple pulse width modulation ( Pulse width modulation), which is converted into the excitation signal of the resolver by the DAC, the DAC digital to analog converter (Digital to analog converter), the resolver outputs the converted angle signal to the DSP through the filter circuit, and after a series of algorithm conversion, The output signal is converted into a specific angle value by ADC.

[0068] This not only solves the defects of traditional algorithms such as poor anti-interference, lagging output, high memory resources, and high hardware requirements, but also can ach...

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Abstract

The invention relates to a DSP-based high-precision and high-response decoding method of a rotary transformer. The rotary transformer, a hybrid operation circuit, a single chip microcomputer or a programmable logic device forms a decoding system; and the specific method is to perform demodulation and normalization processing on an output signal by using the rotary transformer, obtain a pseudo-linear signal through a series of hybrid operations, perform logic partition judgment on the signal, perform calculation according to the judgment result to obtain an uncompensated angle signal, and finally perform nonlinear precision compensation on the signal to improve the decoding precision. The algorithm proposed by the invention greatly reduces the decoding cost of the rotary transformer, reduces the decoding difficulty, obtains accurate angle data to be tested and can fully satisfy most high-precision application occasions.

Description

Technical field [0001] The invention belongs to the decoding algorithm technology in the decoding of the resolver, mainly to improve the accuracy of the resolver decoding system, and relates to the method of linear transformation of the output signal of the resolver and the realization process of the angle decoding, which is realized by DSP and analog circuit. DSP referred to as Digital Signal Processor (Digital Signal Processor) Background technique [0002] In robots, machine tools, airplanes, radars and other occasions that need to obtain angular velocity information, most of them use photoelectric encoders and magnetic encoders to obtain angular position information. Once faced with extremely harsh environments, such as strong vibration or high and low temperatures, these sensors It is extremely easy to be damaged, and the resolver can adapt to this environment well. At the same time, because the resolver has the characteristics of high precision and high reliability, it is a...

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Application Information

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IPC IPC(8): G05B19/042
CPCG05B19/0423G05B2219/21137
Inventor杨瑞峰郭晨霞张伟鹏
OwnerZHONGBEI UNIV