Results 31 to 40 of about 481,793 (353)

An Adaptive Command Scaling Method for Incremental Flight Control Allocation

Actuators
Modern aircraft usually employ control allocation to distribute virtual control commands among redundant effectors. Infeasible virtual command can occur frequently due to aggressive maneuvers and limited control authority.
Zhidong Lu, Jiannan Zhang, Hangxu Li, Florian Holzapfel   +3 more
doaj   +1 more source

Optimal Trajectory Planning and Coordinated Tracking Control Method of Tethered Space Robot Based on Velocity Impulse

International Journal of Advanced Robotic Systems, 2014
The tethered space robot (TSR) is a new concept of space robot which consists of a robot platform, space tether and operation robot. This paper presents a multi-objective optimal trajectory planning and a coordinated tracking control scheme for TSR based
Panfeng Huang, Xiudong Xu, Zhongjie Meng
doaj   +1 more source

Flight of the dragonflies and damselflies [PDF]

, 2016
This work is a synthesis of our current understanding of the mechanics, aerodynamics and visually mediated control of dragonfly and damselfly flight, with the addition of new experimental and computational data in several key areas.
Alexander DE, Alexander DE, Azuma A, Bomphrey RJ, Chadwick LE, Corbet S, Dijkstra K-DB, Ennos AR, Grimaldi D, Hertel H, Huai-Ti Lin, Kesel AB, Liu H, Luttges M, Magnan A, May ML, Neville AC, Newman BG, Newman DJS, Okamoto M, Per Henningsson, Rajabi H, Richard J. Bomphrey, Rudolph R, Rüppell G, Stepniewski WZ, Toshiyuki Nakata, Wakeling JM, Wakeling JM, Wakeling JM   +29 more
core   +2 more sources

An Innovative Priority-Aware Mission Planning Framework for an Agile Earth Observation Satellite

Aerospace
Earth observation satellites, particularly agile Earth observation satellites (AEOSs) with enhanced attitude maneuverability, have become increasingly crucial in emergency response and disaster monitoring operations.
Guangtong Zhu, Zixuan Zheng, Chenhao Ouyang, Yufei Guo, Pengyu Sun   +4 more
doaj   +1 more source

Multi-Body Ski Jumper Model with Nonlinear Dynamic Inversion Muscle Control for Trajectory Optimization

Proceedings, 2018
This paper presents an approach to model a ski jumper as a multi-body system for an optimal control application. The modeling is based on the constrained Newton-Euler-Equations.
Patrick Piprek, Franziska Glas, Xiang Fang, Veronica Bessone, Johannes Petrat, Matthias Bittner, Florian Holzapfel   +6 more
doaj   +1 more source

Situational Awareness and Problems of Its Formation in the Tasks of UAV Behavior Control

Applied Sciences, 2021
Situational awareness formation is one of the most critical elements in solving the problem of UAV behavior control. It aims to provide information support for UAV behavior control according to its objectives and tasks to be completed.
Dmitry M. Igonin, Pavel A. Kolganov, Yury V. Tiumentsev   +2 more
doaj   +1 more source

Valosin‐containing protein counteracts ATP‐driven dissolution of FUS condensates through its ATPase activity in vitro

FEBS Letters, EarlyView.
Biomolecular condensates formed by fused in sarcoma (FUS) are dissolved by high ATP concentrations yet persist in cells. Using a reconstituted system, we demonstrate that valosin‐containing protein (VCP), an AAA+ ATPase, counteracts ATP‐driven dissolution of FUS condensates through its D2 ATPase activity.
Hitomi Kimura, Shin‐ichi Tate, Kyota Yasuda   +2 more
wiley   +1 more source

Online Deterministic 3D Trajectory Generation for Electric Vertical Take-Off and Landing Aircraft

Aerospace
The use of non-piloted eVTOL aircraft in non-segregated airspace requires reliable and deterministic automatic flight guidance systems for the aircraft to remain predictable to all the users of the airspace and maintain a high level of safety.
Zoe Mbikayi, Agnes Steinert, Dominik Heimsch, Moritz Speckmaier, Philippe Rudolph, Hugh Liu, Florian Holzapfel   +6 more
doaj   +1 more source

Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment

Molecular Oncology, EarlyView.
This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley   +1 more source

Impact of the ozone monitoring instrument row anomaly on the long-term record of aerosol products [PDF]

Atmospheric Measurement Techniques, 2018
Since about three years after the launch the Ozone Monitoring Instrument (OMI) on the EOS-Aura satellite, the sensor's viewing capability has been affected by what is believed to be an internal obstruction that has reduced OMI's spatial coverage.
O. Torres, P. K. Bhartia, H. Jethva, H. Jethva, C. Ahn, C. Ahn   +5 more
doaj   +1 more source