Maneuver Strategy for Active Spacecraft to Avoid Space Debris and Return to the Original Orbit
International Journal of Aerospace Engineering, 2022 During normal operation of the on-orbit spacecraft, if some satellite in a nearby orbit suddenly breaks apart, its debris will threat the safe operation of the on-orbit spacecraft.
Qun Fang +4 more
doaj +1 more source
The long-term transport and radiative impacts of the 2017 British Columbia pyrocumulonimbus smoke aerosols in the stratosphere [PDF]
Atmospheric Chemistry and Physics, 2021 Interactions of meteorology with wildfires in British Columbia, Canada, during August 2017 led to three major pyrocumulonimbus (pyroCb) events that resulted in the injection of large amounts of smoke aerosols and other combustion products at the local ...
S. Das +6 more
doaj +1 more source
Flight Investigation of Gyroplane Longitudinal Flight Dynamics [PDF]
This Paper presents an analysis of test data recorded during flight trials of a gyroplane. This class of rotarywing\ud aircraft has found limited application in areas other than sport or recreational flying. However, the accident\ud rate is such that a study of the configuration's stability and control characteristics is timely, and in addition\ud ...
Thomson, Douglas, Houston, Stewart
openaire +3 more sources
Aerospace, 2021 The modern trend of developing highly automated aircraft is characterized by a transition from traditional methods and technical solutions to innovative approaches in order to control the system, inceptor and display design.
Alexandr V. Efremov +2 more
doaj +1 more source
Required Moment Sets: Enhanced Controllability Analysis for Nonlinear Aircraft Models
Applied Sciences, 2021 Attainable moment sets (AMS) are a powerful method to assess aircraft controllability. However, as attainable moment sets only take into account the achievable moment set of the control effectors, they do not assess the required moment set to fulfill the
Max Söpper +3 more
doaj +1 more source
Trajectory/Path-Following Controller Based on Nonlinear Jerk-Level Error Dynamics
Applied Sciences, 2020 This study proposes a novel, nonlinear trajectory/path-following controller based on jerk-level error dynamics. Therefore, at first the nonlinear acceleration-based kinematic equations of motion of a dynamic system are differentiated with respect to time
Patrick Piprek +3 more
doaj +1 more source
A machine learning methodology for the generation of a parameterization of the hydroxyl radical [PDF]
Geoscientific Model Development, 2022 We present a methodology that uses gradient-boosted regression trees (a machine learning technique) and a full-chemistry simulation (i.e., training dataset) from a chemistry–climate model (CCM) to efficiently generate a parameterization of tropospheric ...
D. C. Anderson +13 more
doaj +1 more source
Coupled flight dynamics and CFD - demonstration for helicopters in shipborne environment [PDF]
, 2017 The development of high-performance computing and computational fluid dynamics methods have evolved to the point where it is possible to simulate complete helicopter configurations with good accuracy.
Barakos, G.N., Crozon, C., Steijl, R.
core +1 more source
A new airborne laser-induced fluorescence instrument for in situ detection of formaldehyde throughout the troposphere and lower stratosphere [PDF]
Atmospheric Measurement Techniques, 2015 The NASA In Situ Airborne Formaldehyde (ISAF) instrument is a high-performance laser-based detector for gas-phase formaldehyde (HCHO). ISAF uses rotational-state specific laser excitation at 353 nm for laser-induced fluorescence (LIF) detection of HCHO ...
M. Cazorla +5 more
doaj +1 more source
Biologically Inspired Feedback Design for Drosophila Flight [PDF]
, 2007 We use a biologically motivated model of the Drosophila's flight mechanics and sensor processing to design a feedback control scheme to regulate forward flight.
Dickinson, Michael H. +6 more
core +1 more source