Design of Vibration Isolation System for Laser Strapdown IMU

The circular probable error is a little larger in the ground dynamic navigation test of the laser gyroscope Strap down inertial navigation system, so a better vibration damping system needs to be designed for SINS with laser gyro. Through analysis for the model of the vibration and the old vibration damping system, a new system of the double free degree be bring forwarded to reduce the response of random vibration on inertial navigation system. During the design, considering the installing plate is part of the vibration damping system and reckoning the inner space of the tactical missile carefully , using the finite element dynamic optimization method, a satisfactory installing plate and a damper with better dynamic characteristics is designed, then through ground vibration experiment and the designed of repetition parameter optimization, now the new vibration damping system can work effectively and the effect of vibration absorbing has achieved the requirement, it can be applied to the aircraft.

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Dynamic Research and Design on SINS Damping System in Vehicle

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.328-330.1679 ◽

2011 ◽

Vol 328-330 ◽

pp. 1679-1683

Author(s):

Jie Li ◽

Rui Ping Tao ◽

Jun Liu ◽

Wei Chen

Keyword(s):

Vibration Isolation ◽

Inertial Navigation ◽

Vibration Damping ◽

Test Results ◽

Characteristic Analysis ◽

Isolation System ◽

Vibration Isolation System ◽

System Vibration ◽

Research And Design ◽

Damping Model

For the vibration noise problem of strap-down inertial navigation system in the vehicle, a better vibration damping system was designed. Based on the vibration characters of the vehicle environment, a vibration damping model fitted the SINS in the vehicle was presented; and then the mechanism of vibration damping system was designed especially; and then the design of vibration damping system was verified by using of the dynamic characteristic analysis, On the basis of the above analysis, the overall structure of actual vibration isolation system was built, and then the test for the vibration isolation system was made, the results show that the micro-isolation system for the SINS system vibration and noise has a better inhibition effect, and the applicability and the dependability of the vibration damping system is verified by the test results, which provides reference basis for the design of the strap-down inertial navigation damping system in the land vehicle and provides techniques for the better application of SINS in other fields.

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Indoor Navigation Test Results using an Integrated GPS/TOA/Inertial Navigation System

10.21236/ada458227 ◽

2006 ◽

Author(s):

Alison Brown ◽

Yan Lu

Keyword(s):

Navigation System ◽

Inertial Navigation System ◽

Inertial Navigation ◽

Indoor Navigation ◽

Test Results ◽

Navigation Test

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Design of Mounting Bracket for Missile-Borne Laser Gyroscope INS

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.29-32.1640 ◽

2010 ◽

Vol 29-32 ◽

pp. 1640-1645 ◽

Cited By ~ 1

Author(s):

Bin Wu ◽

Hai Feng Wang ◽

De Dong Huang ◽

Pi Man Ding

Keyword(s):

Vibration Isolation ◽

Normal Mode Analysis ◽

Ground Vibration ◽

Mode Analysis ◽

Isolation System ◽

Vibration Isolation System ◽

Navigation Simulation ◽

Navigation Error ◽

Laser Gyroscope ◽

Navigation Test

Since the circle error probability (CEP) of the laser gyroscope inertial navigation system (INS) based on a certain weapon control system is a little larger in ground dynamic navigation test, an effective vibration-damping system has been designed. Data processing for the vibration experiments’ results and normal mode analysis show that the resonance frequency of the original mounting board is near the mechanical dither frequency of the laser gyroscope, which can lead to a larger mounting board response at the mechanical dither frequency. This is the main reason for the larger navigation error. A stiffer mounting board was designed, and another mounting bracket with better dynamic characteristics was developed. Ground vibration experiments and navigation simulation for laser gyroscope show that the new vibration isolation system can feed the desired requirements.

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A Study on Fault Detection Method of Redundant Inertial Navigation System on Micro AUV

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.709.473 ◽

2014 ◽

Vol 709 ◽

pp. 473-479 ◽

Cited By ~ 1

Author(s):

Kun Peng He ◽

Yu Ping Shao ◽

Lin Zhang ◽

Shou Lei Hu ◽

Yuan Li

Keyword(s):

Fault Detection ◽

Navigation System ◽

Inertial Navigation System ◽

Autonomous Underwater Vehicle ◽

Inertial Navigation ◽

Optimization Method ◽

Fault Detection And Isolation ◽

Measurement Unit ◽

Support Vector ◽

Ratio Test

In order to improve the precision and reliability of the autonomous underwater vehicle (AUV) inertial navigation system, a redundant inertial measurement unit (RIMU) based on micro electromechanical system (MEMS) inertial sensors has been designed, then use support vector machine theory (SVM),construct multi-fault classifier training and combine three-step search parameter optimization method,to achieve rapid, automatic fault detection and isolation (FDI). With Monte Carlo simulation and experimental analysis, SVM method has more obvious advantages than conventional Generalized Likelihood ratio Test (GLT) on false alarm rate, undetected rate and correct isolation rate for common fault sources of RIMU, and can detect and identify the type and number of failure more effectively on redundant systems, and provide a guarantee for fault sensors isolation.

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