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Hemisphere harmonic oscillator characteristic parameter identification method based on LMS algorithm

An LMS algorithm, a technology of hemispherical harmonic oscillators, applied in special data processing applications, complex mathematical operations, measurement devices, etc., can solve problems such as difficulty in parameter identification, and achieve accurate test results, real-time and accurate results.

Active Publication Date: 2020-08-25
HARBIN ENG UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the difficult problem of parameter identification and propose a kind of hemispherical harmonic oscillator characteristic parameter identification method based on LMS algorithm, in order to obtain accurate characteristic parameter: Δω, Δ(1 / τ), θ ω , θ τ , providing a convenient and effective method for performance evaluation of hemispherical harmonic oscillators

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  • Hemisphere harmonic oscillator characteristic parameter identification method based on LMS algorithm
  • Hemisphere harmonic oscillator characteristic parameter identification method based on LMS algorithm
  • Hemisphere harmonic oscillator characteristic parameter identification method based on LMS algorithm

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Embodiment Construction

[0046] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0047] The steps of the present invention are:

[0048] Step 1: The non-ideal hemispherical harmonic oscillator moves according to the following differential equation in the elliptical orbital coordinate system:

[0049]

[0050] The value of a reflects the vibration amplitude of the gyroscope; the value of q reflects the degree to which the gyroscope deviates from the ideal normal mode; θ is the angle signal; It is a slight difference between the vibration signal and the reference signal.

[0051] Step 2: In full angle mode, apply amplitude control, quadrature control, frequency control and phase control to the gyro.

[0052] Controlled by the amplitude, maintain a=a_setting;

[0053] By quadrature control, the constant term of q is maintained as 0 but the residual sinusoidal change part, and q<

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Abstract

The invention provides a hemisphere harmonic oscillator characteristic parameter identification method based on an LMS algorithm. The method comprises the steps of collecting a detection signal of a vibrating gyroscope, carrying out the data processing, multiplying the detection signal with a reference signal, and solving to obtain a parameter equation under an elliptical coordinate system. Through amplitude control, orthogonal control and frequency control, the parameters are gradually converged to a stable state. An LMS algorithm parameter identification model is constructed according to thecalculated parameter equation under the elliptic coordinate system. And according to the output of the LMS algorithm parameter identification model, solving is carried out to obtain a to-be-solved characteristic parameter, and a characteristic parameter identification function is realized. The method has conciseness, only a hemispherical resonator gyroscope needs to be connected into a drive detection device, and other solutions are completed by the processor. The method has applicability, and the drive detection device can be suitable for measurement of most of hemispherical resonators. Themethod has real-time performance and accuracy, can be used for testing after the gyroscope is assembled, is accurate in test result and can be directly used.

Description

technical field [0001] The invention relates to a method for identifying characteristic parameters of a hemispherical harmonic oscillator based on an LMS algorithm, and belongs to the field of intelligent instruments. Background technique [0002] Due to the limitation of the actual process level, the prepared non-ideal hemispherical resonator often has many errors. Therefore, in order to accurately evaluate the performance index of the hemispherical harmonic oscillator and judge whether it meets the qualified standard, it is necessary to test the following characteristic parameters of the hemispherical harmonic oscillator: stiffness axis anisotropy Δω; stiffness axis misalignment angle θ ω ; Damping axis anisotropy Δ(1 / τ); Damping axis misalignment angle θ τ . [0003] At present, the identification of the characteristic parameters of the hemispherical harmonic oscillator is mostly obtained by accurately measuring the hemispherical harmonic oscillator to obtain more accur...

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Application Information

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IPC IPC(8): G01C25/00G06F30/20G06F30/17G06F17/13
CPCG01C25/005G06F17/13G06F30/17G06F30/20
Inventor 郜中星徐睿东张勇刚王博彭斌南方伯张贵研
Owner HARBIN ENG UNIV
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