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Electronic compass calibration method based on simulated annealing algorithm

A simulated annealing algorithm and electronic compass technology, which is applied in the direction of compass, complex mathematical operations, instruments, etc., can solve the problem of initial parameter troubles of electronic compass

Active Publication Date: 2019-10-11
DALIAN UNIV OF TECH
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Problems solved by technology

[0003] However, in daily work practice, we often need to calibrate the electronic compass when using the electronic compass. If we want to calibrate the electronic compass with high efficiency and high precision, we often use the traditional method of directly analyzing the It is necessary to use an optimization algorithm, such as the method of least squares, and how to determine the initial parameters of the electronic compass in such an algorithm is always a troublesome problem

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  • Electronic compass calibration method based on simulated annealing algorithm
  • Electronic compass calibration method based on simulated annealing algorithm
  • Electronic compass calibration method based on simulated annealing algorithm

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[0035] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings and technical solutions.

[0036] An electronic compass calibration method based on simulated annealing algorithm algorithm, including simulated annealing algorithm nonlinearity and you and electronic compass calibration two parts:

[0037] 1. Nonlinear fitting based on simulated annealing algorithm

[0038] a) First let T=T 0 , generating the first random solution α 0 and calculate E(α 0 );

[0039] b) Update the temperature according to the cooling table, the temperature T of the previous state i , current temperature T j ;

[0040] c) The old solution is α i A new solution α is generated when j , let ΔE=E(α j )-E(α i );

[0041] d) If ΔE≤0, accept the new solution α j , otherwise with probability exp(-ΔE / T j ) to accept the new solution α j ;

[0042] e) At each temperature T j down, repeat L k Second step c) and ...

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Abstract

The invention provides a simulated annealing algorithm-based electronic compass calibration method, and belongs to the technical fields of intelligent algorithms and nonlinear regression. Compared with traditional electronic compass calibration methods and some common optimization algorithms, a simulated annealing algorithm which is used as an algorithm for extensively searching the optimal solution in a solution space has a stronger global convergence superiority, and meets the global convergence characteristic of the solution at an enough high initial temperature, an enough low termination temperature, an enough slow cooling rate and an enough long thermal balance time, that is the simulated annealing algorithm can always find the global minimum point in the solution space under suitableinitial parameter conditions. In actual experiments, it is found that the nonlinear fitting solution of an electronic compass can be generated at a relative good time and space complexity under the proper initial parameters and a new solution generation function, and the accuracy reaches 10E-3. The method adopting the simulated annealing algorithm has a higher precision than the traditional calibration methods and a least square method.

Description

technical field [0001] The invention belongs to the technical field of intelligent algorithms and nonlinear regression, and proposes an optimization method for electronic compass calibration with strong pertinence. Background technique [0002] The electronic compass is an attitude sensor and a magnetic signal sensor widely used in modern technology. Compared with traditional attitude sensors, it has low energy consumption, small size, light weight, and high precision. Its output signal can be processed to realize digital display. It can not only be used for pointing, but its digital signal can control the manipulation of the instrument or provide attitude signals. At present, the three-axis strapdown reluctance digital magnetic compass is widely used. This compass has anti-shake and anti-vibration properties, high heading accuracy, electronic compensation for interference fields, and can be integrated into the control loop for data linking. And other advantages, so it is w...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C17/38G06F17/10
Inventor 杨鑫张宁王予亮胡文博
Owner DALIAN UNIV OF TECH
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