Three different attitude measurements of spinning projectile based on magnetic sensors

Xiang, Chao; Bu, Xiongzhu; Yang, Bo

doi:10.1016/j.measurement.2013.09.002

Cited by 34 publications

(23 citation statements)

References 13 publications

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“…However, the large volume of the satellite receiver is not suitable for the limited space of the projectile. The magnetometer based on the Earth’s magnetic field has the advantages of low cost, strong overload resistance, and all-weather operation [ 13 , 14 , 15 ]. On the one hand, the calibration of the magnetometer is complicated.…”

Section: Introductionmentioning

confidence: 99%

Roll Angular Rate Measurement for High Spinning Projectiles Based on Redundant Gyroscope System

Zhang

et al. 2020

Micromachines

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Precision-guided projectiles, which can significantly improve the accuracy and efficiency of fire strikes, are on the rise in current military engagements. The accurate measurement of roll angular rate is critical to guide a gun-launched projectile. However, Micro-Electro-Mechanical System (MEMS) gyroscope with low cost and large range cannot meet the requirement of high precision roll angular rate measurement due to the limitation by the current technology level. Aiming at the problem, the optimization-based angular rate estimation (OBARS) method specific for projectiles is proposed in this study. First, the output angular rate model of redundant gyroscope system based on the autoregressive integrated moving average (ARIMA) model is established, and then the conventional random error model is improved with the ARIMA model. After that, a Sage-Husa Adaptive Kalman Filter (SHAKF) algorithm that can suppress the time-varying process and measurement noise under the flight condition of the high dynamic of the projectile is designed for the fusion of dynamic data. Finally, simulations and experiments have been carried out to validate the performance of the method. The results demonstrate the proposed method can effectively improve the angular rate accuracy more than the related traditional methods for high spinning projectiles.

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Section: Introductionmentioning

confidence: 99%

Roll Angular Rate Measurement for High Spinning Projectiles Based on Redundant Gyroscope System

Zhang

et al. 2020

Micromachines

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“…Then the roll angle and yaw angle can be calculated using three-axis magnetic strength data. Inspired by Yu's work, Xiang et al [10] used the three orthogonally mounted magnetometers to measure the attitude of high spinning projectile. Both of the above methods can calculate the attitude of the projectile using the magnetometer.…”

Section: Introductionmentioning

confidence: 99%

Extraction and Filter Algorithm of Roll Angular Rate for High Spinning Projectiles

Zhao

Liu

et al. 2019

Mathematical Problems in Engineering

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The accurate measurement of roll angular rate for high spinning projectile has long been a challenging problem. Aiming to obtain the accurate roll angular rate of high spinning projectile, a novel extraction and filter algorithm, BSCZT-KF, is proposed in this paper. Firstly, a compound angular motion model of high spinning projectile is established. According to the model, we translate the roll angular rate measurement problem into a frequency estimation problem. Then the improved CZT algorithm, BSCZT, was employed to realize an accurate estimation of the narrowband signal frequency. Combined with the peak detection method, the BSCZT-KF algorithm is presented to further enhance the frequency estimation accuracy and the real-time performance. Finally, two sets of actual flight tests were conducted to verify the effectiveness and accuracy of the algorithm. The test results show that the average error of estimated roll angular rate is about 0.095% of the maximum of roll angular rate. Compared with the existing methods, the BSCZT-KF has the highest frequency estimation accuracy for narrowband signal.

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“…Only a few types of attitude sensors are suitable for spinning projectiles since the sensors must withstand extremely large loads at launch and rapid spins during flight [1,2]. Magnetometers have been used for projectile attitude measurement systems as they are small in size, lightweight, and low cost [3]. The magnetometers are normally aligned with the body axes of the spinning projectile, and the attitudes of projectiles are calculated by the measured magnetic field information [4,5].…”

Section: Introductionmentioning

confidence: 99%

A Fast Calibration and Compensation Method for Magnetometers in Strap-Down Spinning Projectiles

Long

Zhang

Wei

et al. 2018

Sensors

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Attitude measurement is an essential technology in projectile trajectory correction. Magnetometers have been used for projectile attitude measurement systems as they are small in size, lightweight, and low cost. However, magnetometers are seriously disturbed by the artillery magnetic field during launch. Moreover, the error parameters of the magnetometers, which are calibrated in advance, usually change after extended storage. The changed parameters have negative effects on attitude estimation of the projectile. To improve the accuracy of attitude estimation, the magnetometers should be calibrated again before launch or during flight. This paper presents a fast calibration method specific for a spinning projectile. At the launch site, the tri-axial magnetometer is calibrated, the parameters of magnetometer are quickly obtained by optimal ellipsoid fitting based on a least squares criterion. Then, the calibration parameters are used to compensate for magnetometer outputs during flight. The numerical simulation results show that the proposed calibration method can effectively determine zero bias, scale factors, and alignment angle errors. Finally, a semi-physical experimental system was designed to further verify the performance of the calibration method. The results show that pitch angle error reduces from 3.52° to 0.58° after calibration. The roll angle error is reduced from 2.59° to 0.65°. Simulations and experimental results indicate that the accuracy of magnetometer in strap-down spinning projectile has been greatly enhanced, and the attitude estimation errors are reduced after calibration.

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Three different attitude measurements of spinning projectile based on magnetic sensors

Cited by 34 publications

References 13 publications

Roll Angular Rate Measurement for High Spinning Projectiles Based on Redundant Gyroscope System

Roll Angular Rate Measurement for High Spinning Projectiles Based on Redundant Gyroscope System

Extraction and Filter Algorithm of Roll Angular Rate for High Spinning Projectiles

A Fast Calibration and Compensation Method for Magnetometers in Strap-Down Spinning Projectiles

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