All attitude magnetic deviation compensation for digital magnetic compass

Because of the requirement of accurate measurement of projectile’s flying characteristics and limitations of the traditional attitude measuring methods, a new method based on three pairwise-orthogonal magnetic sensors only is presented for non-spinning projectiles. The characteristic ratio theory proposed in our earlier work is described in detail. In order to get the pitch angle with this theory, the mathematical relationship between magnetic sensors output and the theoretical extreme value is derived in this paper. Based on this relation, the extremum ratio method is expanded to be used in non-spinning projectiles. The measurement error of the attitude measuring method is also analyzed in theoy. At last, the simulation of the method is achieved under the given conditions to prove its effectiveness. The simulation experiment results indicate that the method is feasible and the calculating errors of the attitude angles are within ±1°.

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“…9 to estimate them. This kind of errors could be eliminated by some compass deviation fixed methods [9].…”

Section: Theory Analysis For Attitude Measuring Methodsmentioning

confidence: 99%

Design of New Attitude Measuring Method of Non-Spinning Projectile Based on Magnetic Sensors

Xiang

Zhu

2012

AMM

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“…To overcome the shortcomings of existing magnetic deviation compensation methods, such as high coss, low efficiency, and insufficient compass deviation compensation, Liu et al [11] proposed an all-attitude compass deviation compensation method based on geometric transformation and developed a hybrid PSO algorithm by introducing Newtonian operator into the PSO algorithm. With the PSO algorithm, they selected the optimized parameters' initial values and used the geometric transformation based compensation method to compensate the magnetic azimuth measurement errors of the magnetic compass.…”

Section: Particle Swarm Algorithmmentioning

confidence: 99%

A review of stability control algorithms for weapon platforms

et al. 2023

J. Phys.: Conf. Ser.

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Weapon platforms are considered to be one of the important preconditions that ensure modern weapon systems achieve expected functions, while the critical factor affecting platform stability is control algorithms. Firstly, this paper introduces the importance of weapon platforms and their control algorithms, and classifies conventional weapon platforms. Secondly, after analyzing the application of conventional and modern control algorithms in different weapon platforms, this paper presents the new development trends of weapon platform control algorithms, with the goal of providing some ideas for the development of weapon systems and weapon platforms in China.

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The research of PNS based on micro inertial sensors

Wang

2016

Measurement

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：In order to reduce the dependence of pedestrian navigation on satellite navigation system and wireless communication, a new method is proposed to construct pedestrian navigation system (PNS) based on micro inertial technology. In this paper, the distributed system structure is arranged on human feet and trunk, and the key technologies, namely the system initial alignment, the error correction, the precise gait-phase detection, the effect and the inhibition of environmental magnetic field, have been studied. Besides, theories and applications of the key technologies are also discussed, and the performance of the PNS has been analyzed in the environment of electromagnetic interference. Experimental results show that the positioning error of the route with electromagnetic interference accounts for 2% of the travel distance. The key technologies proposed in the study can effectively improve the positioning accuracy of PNS, and independently achieve longer time personal navigation in the attenuate or even invalid global navigation satellite system(GNSS) and wireless communication signal environment.Keywords：PNS；micro inertial technology；gait-phase detection；zero velocity update；fault detection IntroductionAs an emerging branch of navigation technology, pedestrian navigation has attracted intensive research in recent years. The pedestrian navigation system (PNS) is able to effectively determine individual user's location.Due to its light weight, small volume, affordable price, and portability, PNS has shown a broad prospect in both military and civilian applications[1]. At present, the PNS based on global navigation satellite system (GNSS) and wireless communication technology has been able to demonstrated satisfying performance. However, accurate personal positioning in the presence of electromagnetic interference, for instance, when the GNSS and the wireless communication are interfered, still remains an open issue in the development of pedestrian navigation technologies. Recently, many research institutions and scholars have carried out the research of pedestrian navigation based on MEMS inertial technology to deal with the situation when GNSS becomes unreliable or completely unavailable. Draper laboratory [1-3] first proposed to install MEMS inertial measurement unit (IMU) on the feet of a soldier, and it focused on the calibration of the MEMS sensor's drift error when the foot is motionless. X. Yun et.al [13] changed the way of the installation of the MEMS IMU by fixing it on the dorsum of the foot, and use the zero velocity update method at the time of foot-landing to identify the dynamic phase model of human walking.That method corrects the way of the position error accumulation from over time to over distance and hence prevents the accumulation of positioning error. The Swedish defense research institute [9] has studied the indoor personal navigation method based on the foot-fixed MEMS IMU. Their result shows that the random errors of the inertial sensors could significantly affect the effectiveness of...

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All attitude magnetic deviation compensation for digital magnetic compass

Cited by 4 publications

References 0 publications

Design of New Attitude Measuring Method of Non-Spinning Projectile Based on Magnetic Sensors

Design of New Attitude Measuring Method of Non-Spinning Projectile Based on Magnetic Sensors

A review of stability control algorithms for weapon platforms

The research of PNS based on micro inertial sensors

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