Comparison of free vortex wake and blade element momentum results against large-eddy simulation results for highly flexible turbines under challenging inflow conditions [PDF]
Wind Energy Science, 2023 Throughout wind energy development, there has been a push to increase wind turbine size due to the substantial economic benefits. However, increasing turbine size presents several challenges, both physically and computationally.
K. Shaler +4 more
doaj +1 more source
A new predictive filter for nonlinear alignment model of stationary MEMS inertial sensors [PDF]
Metrology and Measurement Systems, 2021 This paper proposes a new approach called the Predictive Kalman Filter (PKF) which predicts and compensates model errors of inertial sensors to improve the accuracy of static alignment without the use of external assistance.
Hassan Majed Alhassan +1 more
doaj +1 more source
An improved initial alignment method based on adaptive robust CKF algorithm
Xibei Gongye Daxue Xuebao, 2022 When the misalignment angle is a large angle in the strapdown inertial navigation system (SINS), it is necessary to establish a nonlinear error model to estimate the error.
LI Pu, YANG Tao, MU Hongwei
doaj +1 more source
Magnetic Misalignment of Interstellar Dust Filaments
The Astrophysical Journal, 2023 We present evidence for scale-independent misalignment of interstellar dust filaments and magnetic fields. We estimate the misalignment by comparing millimeter-wave dust-polarization measurements from Planck with filamentary structures identified in ...
Ari J. Cukierman +2 more
doaj +1 more source
A Novel Polar Rapid Transfer Alignment for Shipborne SINS Under Arbitrary Misalignments
IEEE Access, 2020 The traditional polar rapid transfer alignment (RTA) are generally modeled under small angle misalignment assumption. Those linearized and nonlinear polar RTA error models presented, so far, are not capable of accurately representing the nonlinear ...
Jianhua Cheng +3 more
doaj +1 more source
Additive Manufacturing Letters, 2023 The shape variation of the laser beam is evidently observed in the laser powder bed fusion (LPBF) process because of changes in laser incidence angle and misalignment between the build plate and the laser focus plane.
Erlei Li +4 more
doaj +1 more source
Isocurvature bounds on axions revisited [PDF]
, 2007 The axion is one of the best motivated candidates for particle dark matter. We study and update the constraints imposed by the recent CMB and LSS experiments on the mass of axions produced by the misalignment mechanism, as a function of both the ...
A. D. Linde +14 more
core +2 more sources
Air-Launch Experiment Using Suspended Rail Launcher for Rockoon
Aerospace, 2021 The method of air-launching a rocket using a launcher suspended from a balloon, referred to as a rockoon, can improve the flight performance of small rockets.
Tadayoshi Shoyama +6 more
doaj +1 more source
Laser-to-droplet alignment sensitivity relevant for laser-produced plasma sources of extreme ultraviolet light [PDF]
, 2018 We present and experimentally validate a model describing the sensitivity of the tilt angle, expansion and propulsion velocity of a tin micro-droplet irradiated by a 1 {\mu}m Nd:YAG laser pulse to its relative alignment.
Gelderblom, Hanneke +4 more
core +6 more sources
Source misalignment in multimode polymer tapered waveguides for optical backplanes [PDF]
, 2007 Polymer tapered multimode waveguides were modeled using the finite difference wide-angle beam propagation method to investigate whether tapered input waveguide couplers decreasing in width away from the waveguide entrance give improved tolerance to ...
Rashed, AM, Selviah, DR
core +1 more source