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Fusion compensation method

A compensation method and post-compensation technology, applied in the field of compensation, can solve the problems of poor compensation accuracy, difficulty in achieving operation speed, and low compensation efficiency, and achieve the effects of high precision, simple steps, and fast speed

Active Publication Date: 2016-05-11
QINGDAO AEROSPACE SEMICON RES INST
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] This kind of compensation method is complex and the compensation efficiency is low. When the compensation data has a large amount of calculation, the calculation speed is difficult to meet the requirements of the inertial navigation system, and the compensation accuracy of the above method is poor. Circumstances in which system accuracy decreases

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Embodiment Construction

[0026] This application compensates on the basis of the traditional calibration method. The traditional calibration method is aimed at the current / frequency conversion circuit, that is, the input of the circuit is the current, and the output is the frequency corresponding to the current.

[0027] A compensation method, comprising the steps of:

[0028] Step 1: Calibration

[0029] For circuit calibration, within the range of -40°C to 60°C, record a zero position data and a scale factor data at intervals of 10°C. The function curve f of zero position and temperature is obtained by curve fitting 0 =f(T), and the function curve K=f'(T) of scale factor and temperature, wherein T is temperature, f 0 is the zero position and K is the scale factor.

[0030] Step 2: Measure

[0031] Measure the temperature to be revised t

[0032] Step Three: Calculate

[0033] Calculate the zero value and scale factor value under the condition of temperature t, the calculation formula uses the...

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Abstract

Belonging to compensation methods, the invention in particular relates to a fusion compensation algorithm for improving voltage / frequency conversion circuit zero position and scale factor temperature characteristic. The method includes: step 1. calibration, step 2. measurement, step 3. calculation, step 4. reading of the data navigation cycle tau, step 5. calculation of the compensated zero position, step 6. reading of the scale factor target value Km, and step 7. calculation of the compensated scale factor. The compensation method provided by the invention can directly calculate the compensated zero position and scale factor, avoids the process of firstly calculating a compensation value and then calculating a final result, has the characteristics of simple steps, high precision and fast speed, and fully meets the requirements of an inertial navigation system.

Description

technical field [0001] The invention belongs to a compensation method, and in particular relates to a fusion compensation algorithm for improving the zero position and temperature characteristics of a scale factor of a voltage / frequency conversion circuit. Background technique [0002] The voltage / frequency conversion circuit is usually used in the inertial navigation system, and its function is to convert the input voltage signal into a frequency proportional to it, and provide it to the navigation computer for counting. The functional relationship between the output frequency f of the voltage / frequency conversion circuit and the input voltage V satisfies the formula (1): In the formula, V 入 Is the measured input voltage; I 反 is the feedback reference current; F is the reference frequency; η is a coefficient determined by the input resistance and the feedback current shunt coefficient; f is the output frequency (conversion result). Usually, the temperature compensation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/16G01C21/20
Inventor 王蒙黄佳董建树贾明福李劲涛庞葳赵晨吴
Owner QINGDAO AEROSPACE SEMICON RES INST