Results 221 to 230 of about 19,814 (256)

Multiple Natural Features Fusion for On-Site Calibration of LiDAR Boresight Angle Misalignment

IEEE Transactions on Geoscience and Remote Sensing, 2022
Boresight angle misalignment is a major error source in a mobile light detection and ranging (LiDAR) system (MLS), which directly affects the overall accuracy and quality of MLS scanned point clouds data. However, the current calibration of the boresight angle misalignment mainly relies on artificial target features or a manual adjustment, and the ...
Wanli Liu, Paolo Gardoni, Zhixiong Li 0001, Grzegorz Królczyk, Haiping Du, Weihua Li 0001, Miguel Ángel Sotelo   +6 more
openaire   +2 more sources

Misalignment Angle and Calibration of a Two-component Electromagnetic Log

Journal of Navigation, 1976
A simple method is described for estimating the angle of misalignment of a two-component electromagnetic log, using the covariance properties of the measured components when a ship is steered in a constant cross wind at a number of different speeds. It is shown that, with the present accuracy of radar fixing, allowing for misalignment has a very small ...
openaire   +1 more source

Far field measurements of small angle carbon fiber misalignments

2017 IEEE 18th Wireless and Microwave Technology Conference (WAMICON), 2017
Manufacturing of advanced composites for aircraft structures requires precise layups of carbon fiber tape. Currently visual inspection is the method used to determine if tape angle deviations are acceptable. Automated inspection during fabrication would decrease inspection times and therefore reduce costs.
William C. Wilson, Jason P. Moore, Peter D. Juarez   +2 more
openaire   +1 more source

Polar transfer alignment of shipborne SINS with a large misalignment angle

Measurement Science and Technology, 2016
Existing polar transfer alignment (TA) algorithms are designed based on linear Kalman filters (KF) to estimate misalignment angles. In the case of a large misalignment angle, these algorithms cannot be applied in order to achieve accurate TA. In this paper, a TA algorithm based on an unscented Kalman filter (UKF) is proposed to solve the problem of the
Jianhua Cheng, Tongda Wang, Dongxue Guan, Meiling Li   +3 more
openaire   +1 more source

Effect of crystal and collimator misalignments on Bragg angle measurements

Pramana, 1974
A mathematical analysis has been made of the combined effect of crystal and collimator misalignments on Bragg angles measured from zero-layer Weissenberg photographs. The results obtained here have been compared with those available for Bond’s method of measuring Bragg angles with diffractometers.
openaire   +1 more source

A high resolution method for characterisation of fibre misalignment angles in composites

Composites Science and Technology, 2018
Abstract In this paper a novel method to characterise fibre waviness in composites is presented and assessed. The proposed method referred to as the “high resolution misalignment analysis” (HRMA) method and is suitable for measurements with high spatial resolution.
D. Wilhelmsson, L.E. Asp
openaire   +1 more source

Distortion of Angle-Modulated Signals in Misaligned Linear Filters

IEEE Transactions on Communications, 1960
Differences in distortion are calculated for sinusoidally phase modulated signals that are passed through dissimilar single-tuned RLC filters. The differences in distortion of two identical signals are related to filter tolerances. A two-tone phase modulated signal is shown to experience significant distortions relative to a single-tone phase modulated
openaire   +1 more source

Study on the Reflection of the IRS in the Presence of Misaligned Incident Angles

2022 27th Asia Pacific Conference on Communications (APCC), 2022
Van Phu Tuan, The-Hien Pham, Ic-Pyo Hong
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MIMU Parameter Identification for Large Misalignment Angles Based on AFSA

Applied Mechanics and Materials, 2014
High precision calibration of Micro inertial measurement unit (MIMU) for large installation misalignment can improve the instrument and the practical use of the system precision. It can use high precision turntable to get the coarse value of installation misalignment angle as the optimization initial value, and take the standard deviation of turntable ...
Kun Peng He, Chen Yang Wang, Yuan Li
openaire   +1 more source

Spin-orbit angles, and the aligned-misaligned transition

2013
Peer ...
Brown, D. J. A., Triaud, A. H. M. J., Cameron, A. C.   +2 more
openaire   +1 more source