Finite element analysis and optimization of dither mechanism in dithered ring laser gyroscope

Yu, Xudong; Wei, Guo; Long, Xingwu; Tang, Jianxun

doi:10.1007/s12541-013-0057-3

Cited by 16 publications

(7 citation statements)

References 8 publications

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“…In this paper, we apply AFS algorithm to compensate the temperature drift of accelerometer. The strapdown inertial navigation system designed by our laboratory is packaged with system electronic housing and sensor assembly [10,11] . The sensor assembly is composed of three mechanically dithered ring laser gyros and three quartz flexible accelerometers.…”

Section: Experiments Data and Results Analysis 31 Datamentioning

confidence: 99%

Temperature Drift Compensation Based on Artificial Fish Swarm Algorithm for Quartz Flexible Accelerometer

Yan

et al. 2014

AMM

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Temperature is an important factor for affecting the accuracy of quartz flexible accelerometer. The relationship of quartz flexible accelerometers drift to temperature should be established accurately which can improve the precision of inertial navigation system. In order to reduce the temperature sensitivity and improve the sensor performance, temperature drift compensation method based on artificial fish swarm (AFS) algorithm is established and the steps and methods are given. The traditional modeling method of stepwise regression is also investigated to provide a comparison with the AFS algorithm. The result shows that the temperature compensation model by AFS algorithm is accurate. The drift instability of accelerometer output is reduced from 160.2ug to 18.0ug over the temperature range from-20°Cto +50°C. The results of the stochastic temperature tests show that this method has reduced the influence of temperature variation effectively and improved the accelerometer accuracy.

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Section: Experiments Data and Results Analysis 31 Datamentioning

confidence: 99%

Temperature Drift Compensation Based on Artificial Fish Swarm Algorithm for Quartz Flexible Accelerometer

Yan

et al. 2014

AMM

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“…When the thermal characteristics of the RLG are analyzed, the main sources of heat are equivalent to the models with different heat generation rates (HGENs), which are shown in Table 2 [ 23 ].…”

Section: Multiple-point Temperature Compensation Analysis Of Rlg Bmentioning

confidence: 99%

Multiple-Point Temperature Gradient Algorithm for Ring Laser Gyroscope Bias Compensation

Zhang

Wei

et al. 2015

Sensors

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To further improve ring laser gyroscope (RLG) bias stability, a multiple-point temperature gradient algorithm is proposed for RLG bias compensation in this paper. Based on the multiple-point temperature measurement system, a complete thermo-image of the RLG block is developed. Combined with the multiple-point temperature gradients between different points of the RLG block, the particle swarm optimization algorithm is used to tune the support vector machine (SVM) parameters, and an optimized design for selecting the thermometer locations is also discussed. The experimental results validate the superiority of the introduced method and enhance the precision and generalizability in the RLG bias compensation model.

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“…Addressing the problem of airborne gravimeter temperature control systems, some research, according to the structure and material properties of the quartz flexible accelerometer, have built the temperature field distribution of the quartz flexible accelerometer under the condition of only considering heat transfer [ 5 ]. Others, mainly focusing on control algorithm, have ignored the importance of the thermal structure design [ 6 , 7 , 8 ]. What’s more, research about airborne gravimeter temperature control systems is rare.…”

Section: Introductionmentioning

confidence: 99%

Optimized Design of the SGA-WZ Strapdown Airborne Gravimeter Temperature Control System

Cao

Wang

Cai

et al. 2015

Sensors

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The temperature control system is one of the most important subsystems of the strapdown airborne gravimeter. Because the quartz flexible accelerometer based on springy support technology is the core sensor in the strapdown airborne gravimeter and the magnet steel in the electromagnetic force equilibrium circuits of the quartz flexible accelerometer is greatly affected by temperature, in order to guarantee the temperature control precision and minimize the effect of temperature on the gravimeter, the SGA-WZ temperature control system adopts a three-level control method. Based on the design experience of the SGA-WZ-01, the SGA-WZ-02 temperature control system came out with a further optimized design. In 1st level temperature control, thermoelectric cooler is used to conquer temperature change caused by hot weather. The experiments show that the optimized stability of 1st level temperature control is about 0.1 °C and the max cool down capability is about 10 °C. The temperature field is analyzed in the 2nd and 3rd level temperature control using the finite element analysis software ANSYS. The 2nd and 3rd level temperature control optimization scheme is based on the foundation of heat analysis. The experimental results show that static accuracy of SGA-WZ-02 reaches 0.21 mGal/24 h, with internal accuracy being 0.743 mGal/4.8 km and external accuracy being 0.37 mGal/4.8 km compared with the result of the GT-2A, whose internal precision is superior to 1 mGal/4.8 km and all of them are better than those in SGA-WZ-01.

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Finite element analysis and optimization of dither mechanism in dithered ring laser gyroscope

Cited by 16 publications

References 8 publications

Temperature Drift Compensation Based on Artificial Fish Swarm Algorithm for Quartz Flexible Accelerometer

Temperature Drift Compensation Based on Artificial Fish Swarm Algorithm for Quartz Flexible Accelerometer

Multiple-Point Temperature Gradient Algorithm for Ring Laser Gyroscope Bias Compensation

Optimized Design of the SGA-WZ Strapdown Airborne Gravimeter Temperature Control System

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