Determining Inertial Orientation of a Spinning Body With Body-Fixed Sensors

Hepner, David J.; Harkins, Thomas E.

doi:10.21236/ada391881

Cited by 8 publications

(6 citation statements)

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“…The two approximate hypotheses are the basis for the angular estimation of the all-magnetic sensor independently. Harkins et al pointed out their methods under the two conditions [24]. On this foundation, we begin to introduce the two methods.…”

Section: Magnetometer Configurationsmentioning

confidence: 98%

Spinning projectile’s angular measurement using crest and trough data of a geomagnetic sensor

Zhou

Zhang

Xiao

2018

Meas. Sci. Technol.

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As a projectile's attitude measurement is significant for flight control, the 'crest and trough method' only based on the geomagnetic sensor signal is proposed to improve the angular measurement accuracy. Firstly, the geomagnetic sensor distribution is introduced, then the mathematical deduction is expatiated and the procedure of the 'crest and trough method' is elaborated. Based on the drawbacks of existing methods, the proposed method focuses on improvements that are vital to enhance the measurement accuracy. Finally, simulation and experiment are carried out to prove the effectiveness of the proposed algorithm, and the results used to demonstrate that this method not only has no cumulative error, which occurs in micro-inertial sensors, but also has better precision than traditional geomagnetic angular measurement methods because of the twice faster angle update rate and elimination of interpolation.

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Section: Magnetometer Configurationsmentioning

confidence: 98%

Spinning projectile’s angular measurement using crest and trough data of a geomagnetic sensor

Zhou

Zhang

Xiao

2018

Meas. Sci. Technol.

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“…When both solar and magnetic aspect angle histories are available and the solar, magnetic, and roll axis vectors are not coplanar, the sense of the coning motion can be resolved with the analysis tools of the present work. An independent validation of the coning motion was also undertaken for some cases using the vector matching technique termed POINTER (Projectile Orientation In Navigation TERms -U.S. patent 6398155 [11]) described in Hepner and Harkins (12) and Harkins (13).…”

Section: The 105-mm Flight Dynamics: Vapp-7mentioning

confidence: 99%

Aerodynamic Characterizations of Asymmetric and Maneuvering 105mm, 120mm, and 155mm Fin-Stabilized Projectiles Derived from Telemetry Experiments

Fresconi

Harkins

2011

AIAA Atmospheric Flight Mechanics Conference

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“…Due to ever-increasing accuracy requirements for precision-guided weapons, acquisition of accurate flight attitude information of projectiles has become crucially important for analyzing their flight dynamics, as well as providing support for the navigation & guidance system. At present, the most commonly used attitude measurement methods rely on solar sensors [1,2], angular rate gyros [3,4,5], inertial measurement units (IMU) [6,7,8] and magnetometers [9,10,11]. Among these methods, the solar sensors work effectively only under good weather conditions, the angular velocity gyros have an upper limit on the rotational speed of the projectile, and the IMU suffer from error accumulation.…”

Section: Introductionmentioning

confidence: 99%

A Novel Method for Estimating Pitch and Yaw of Rotating Projectiles Based on Dynamic Constraints

An¹,

Wang

Liu

et al. 2019

Sensors

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This paper addresses the difficult problem of measuring the attitude of a high-spinning projectile and presents a novel method for estimating the pitch and yaw angles of the projectile in flight. The method is based on analysis of the external moment of the rotating projectile during flight and theoretical derivations obtained from the dynamics’ equations. First, the principle of zero-crossing method is introduced, which explains the process of geomagnetic azimuth and roll measurements by the non-orthogonal geomagnetic sensor combination. Then, the dynamics constraint equations between the Euler angles and flight-path angle, trajectory deflection angle of the projectile are derived using the dynamics equations of the projectile rotating around the centroid, and analysis of the flight characteristics of the projectile in stable flight. Next, the spatial orientation relationship between pitch, yaw angles and magnetic azimuth is established based on the physical principle of geomagnetic azimuth. Finally, the pitch and yaw angles are estimated using the unscented Kalman filter (UKF), with the dynamics constraint equations serving as the driving equations. In the UKF prediction stage, the Runge-Kutta method is used to discretize the state equation that improves the prediction accuracy. Simulation results show that the proposed method can be used to accurately calculate the pitch and yaw angles, and results of experimental data processing also verify the feasibility of the proposed method for real-world applications.

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Determining Inertial Orientation of a Spinning Body With Body-Fixed Sensors

Cited by 8 publications

References 0 publications

Spinning projectile’s angular measurement using crest and trough data of a geomagnetic sensor

Spinning projectile’s angular measurement using crest and trough data of a geomagnetic sensor

Aerodynamic Characterizations of Asymmetric and Maneuvering 105mm, 120mm, and 155mm Fin-Stabilized Projectiles Derived from Telemetry Experiments

A Novel Method for Estimating Pitch and Yaw of Rotating Projectiles Based on Dynamic Constraints

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