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Method for generating accelerated stability profile of dynamically tuned gyro based on finite element

A dynamic tuning gyro and finite element technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as high cost, time-consuming, difficult to operate, etc., to facilitate debugging, avoid human errors, reduce construction Effect of Model Workload

Inactive Publication Date: 2011-07-13
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the engineering test method is used to verify the designed new accelerated stability profile, which is time-consuming, costly and difficult to operate.

Method used

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  • Method for generating accelerated stability profile of dynamically tuned gyro based on finite element
  • Method for generating accelerated stability profile of dynamically tuned gyro based on finite element
  • Method for generating accelerated stability profile of dynamically tuned gyro based on finite element

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Embodiment Construction

[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0039] The following examples are as follows figure 1 The implementation of the process shown mainly includes selecting finite element elements, establishing a material model library, establishing a geometric model, establishing a finite element model, applying constraints and loads, and transient thermal-structural coupling simulation. The structure of DTG is composed of figure 2 As shown, in general, DTG consists of two parts, the mechanical part and the circuit part. The mechanical part mainly includes gyro rotor, flexible joint, support ring, shell, torquer magnet, magnetic isolation ring, magnetic conduction ring, etc.; the circuit part mainly includes torquer coil, drive motor and sensor. Since the DTG is in a de-energized state during the accelerated stability test, the influence of the circuit part on the stability parameters can be...

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Abstract

The invention discloses a method for generating the accelerated stability profile of a dynamically tuned gyro based on a finite element, comprising the following steps: 1. selecting a finite element unit by combining the main mechanism of DTG (ate time group) parametric variation; 2. building a material model bank: defining a unit system, and inputting the material attribute of each part; 3. determining a modelling part by analyzing the main mechanism of DTG parametric variation, simplifying a model connection relationship, building a DTG geometric model in finite element software, and carrying out material attribute assignment to the DTG geometric model; 4. building a DTG finite element model: implementing different grid precision partitioning methods aiming at different parts of the DTGto partition a finite element grid; 5. restraining and loading the DTG finite element model, carrying out thermal-structural coupling analysis, and obtaining the variation rule of the internal residual stress of DTG under different temperature profiles through simulated calculation; and 6. analyzing the simulation result of the finite element according to the DTG performance parameter stability criterion, and selecting an optimized DTG accelerated stability simulation profile. The method has high precision and is easy to realize.

Description

technical field [0001] The invention provides a finite element-based method for generating acceleration and stability profiles of a dynamic tuning gyroscope, which relates to the determination of the internal residual stress release law of a dynamic tuning gyroscope under different acceleration and stability profiles, and belongs to the technical field of acceleration stability test simulation. Background technique [0002] Gyroscopes are the core element of inertial navigation systems. The working accuracy, manufacturing cost, reliability and stability of the gyroscope are one of the most important factors that determine the working accuracy, manufacturing cost, reliability and stability of the inertial navigation system. Compared with the characteristics of various commonly used gyroscopes, Dynamically Tuned Gyro (hereinafter referred to as DTG) is widely used in the fields of aerospace, ships, and robots due to its simple structure, strong impact resistance, high reliabil...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 陈云霞梁媛康锐
Owner BEIHANG UNIV
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