A Real-Time Estimation Method of Roll Angle and Angular Rate Based on Geomagnetic Information
Joint Authors
Zhang, Xiaoming
Gao, Lizhen
Zhang, Yingying
Xue, Yuyang
Source
Mathematical Problems in Engineering
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-10-27
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
In the course of the guidance transformation of the rotating projectile, the accurate acquisition of the roll angle and roll angle rate is very important to the attitude determination and guidance control of the rotating projectile.
However, due to the impact of high rotation and high overload of projectile, MEMS gyros have problems such as limited range, saturation, overload, and even performance degradation, which make the roll angle rate unable to be output normally.
At the same time, because the MEMS gyro estimation of roll angle is in the form of angular rate integral, the roll angle cannot be estimated normally if the roll angle rate cannot be accurately obtained.
In order to solve this problem, a real-time estimation of projectile roll angle and roll rate based on geomagnetic information under high dynamic and high overload conditions is presented.
Firstly, according to the motion characteristics of the rotating projectile, the motion model of the projectile is established, and the roll angle and roll angle rate of the projectile are estimated by Kalman filtering algorithm under the conditions of high axial rotation and high overload.
Considering the high dynamic characteristics of the rotating projectile, based on the Kalman filter, the algorithm of the forgetting filter with the forgetting factor is further adopted to estimate the roll angle and roll angle rate, so as to reduce the error caused by the estimation delay in the process of high-speed dynamic change.
Simulation data and semiphysical test results show that the accuracy of roll angle estimated by this method reaches about 2° in semiphysical test, which is one time higher than that calculated by the system.
In the semiphysical experiment, the accuracy of the estimated roll rotation rate reaches 5 °/s, which is more than 6 times higher than that obtained by direct derivation.
In the high dynamic stage, compared with the pure Kalman filter, the accuracy of roll angle with forgetting factor estimation is improved by an order of magnitude, and the accuracy of roll angle rate is improved by 4 times, which meets the desired accuracy of rotating projectile.
American Psychological Association (APA)
Gao, Lizhen& Zhang, Yingying& Zhang, Xiaoming& Xue, Yuyang. 2020. A Real-Time Estimation Method of Roll Angle and Angular Rate Based on Geomagnetic Information. Mathematical Problems in Engineering،Vol. 2020, no. 2020, pp.1-11.
https://search.emarefa.net/detail/BIM-1201957
Modern Language Association (MLA)
Gao, Lizhen…[et al.]. A Real-Time Estimation Method of Roll Angle and Angular Rate Based on Geomagnetic Information. Mathematical Problems in Engineering No. 2020 (2020), pp.1-11.
https://search.emarefa.net/detail/BIM-1201957
American Medical Association (AMA)
Gao, Lizhen& Zhang, Yingying& Zhang, Xiaoming& Xue, Yuyang. A Real-Time Estimation Method of Roll Angle and Angular Rate Based on Geomagnetic Information. Mathematical Problems in Engineering. 2020. Vol. 2020, no. 2020, pp.1-11.
https://search.emarefa.net/detail/BIM-1201957
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1201957