Results 71 to 80 of about 91,489 (305)

Optimal Thrust Allocation Strategy of Electric Propulsion Ship Based on Improved Non-Dominated Sorting Genetic Algorithm II

IEEE Access, 2019
The azimuth thruster is widely used in electric propulsion ships due to its excellent performance. The thrust allocation (TA) method of multi-azimuth thruster is the key technology in ship motion control. The purpose of TA is to accurately distribute the
Diju Gao, Xuyang Wang, Tianzhen Wang, Yide Wang, Xiaobin Xu   +4 more
doaj   +1 more source

An Actuator Allocation Method for a Variable-Pitch Propeller System of Quadrotor-Based UAVs

Sensors, 2020
This paper presents a control allocation method for enhancing the attitude following performance and the energy efficiency of a variable-pitch propeller (VPP) system on quadrotor-based unmanned aerial vehicles. The VPP system was modeled according to the
Ching-Wei Chang, Shengyang Chen, Chih-Yung Wen, Boyang Li   +3 more
doaj   +1 more source

All-propulsion design of the drag-free and attitude control of the European satellite GOCE

, 2009
This paper concerns the drag-free and attitude control (DFAC) of the European Gravity field and steady-state Ocean Circulation Explorer satellite (GOCE), during the science phase.
Canuto, Canuto, Canuto, Canuto, DeBra, Donati, Enrico Canuto, Fichter, Fichter, Johannessen, Koenig, Lange, Luca Massotti, Picone, Tapley, Touboul, Vaillon, Vallado, Vaniček   +18 more
core   +1 more source

Did the Indian Green Revolution Change the Farm Size–Productivity Relationship?

Applied Economic Perspectives and Policy, EarlyView.
ABSTRACT We examine the relationship between farm size and productivity during India's Green Revolution, a period of rapid technological transformation. Using a unique panel of over 5000 Indian farm households that spans the Green Revolution (1971–1999), we show that the classic (linear) inverse farm size–productivity relationship gradually evolved ...
Rabail Chandio, Leah E. M. Bevis
wiley   +1 more source

An Innovative Control Allocation Framework for a Novel Tiltrotor Aircraft

IEEE Access, 2020
Control allocation is still a challenge for tiltrotor aircraft due to effectors' redundancy, dramatic nonlinearities and cross-coupling. Besides this, the external disturbance caused by the unique configuration of tiltrotor such as larger wing area and ...
Yifan Xu, Qian Zhang, Zelong Yu
doaj   +1 more source

Temperature and Farm Labor in Nigeria

Applied Economic Perspectives and Policy, EarlyView.
ABSTRACT We estimate the impact of temperature shocks on the composition of farm labor in rural Nigeria using a nationally representative household panel survey. Leveraging plausibly exogenous year‐to‐year variation in growing season temperatures, we find that warmer temperatures significantly alter farm labor composition, prompting a substantial shift
Andu Berha
wiley   +1 more source

A Constrained Thrust Allocation Algorithm for Remotely Operated Vehicles

IFAC-PapersOnLine, 2018
Abstract In this paper, the constrained thrust allocation problem is studied and solved for the class of over-actuated Remotely Operated Vehicles. In detail, we find the solution of the thrust allocation when the thrusters are affected by possible faults and, simultaneously, taking into account the thrusters’ saturation limits.
Alessandro Baldini, Antonio Fasano, Riccardo Felicetti, Alessandro Freddi, Sauro Longhi, Andrea Monteriù   +5 more
openaire   +1 more source

Kenyan Farmers' Policy Priorities During Economic Crisis and Stability: Insights From a Best‐Worst Scaling Experiment

Applied Economic Perspectives and Policy, EarlyView.
ABSTRACT Amid rising food and fertilizer prices, understanding farmers' policy preferences is critical for effective crisis response. We use best‐worst scaling experiment to assess Kenyan mobile‐owning crop farmers' preferences for government support under high and normal price scenarios.
Mywish K. Maredia, John Olwande, Jacob Ricker‐Gilbert, David L. Mather, Nicole M. Mason   +4 more
wiley   +1 more source

The Design of a New Type of Remotely Operated Vehicle System and the Realization of a Thrust Distribution Method

Applied Sciences
In order to realize the detection of marine engineering facilities, the hardware system of a new type of remotely operated vehicle (ROV) is designed independently, and the control system, including the lower computer program and the upper computer ...
Fushen Ren, Xin Guo, Xin Deng, Baojin Wang, Zhongyang Wang   +4 more
doaj   +1 more source

Convex MPC and Thrust Allocation With Deadband for Spacecraft Rendezvous

IEEE Control Systems Letters
This paper delves into a rendezvous scenario involving a chaser and a target spacecraft, focusing on the application of Model Predictive Control (MPC) to design a controller capable of guiding the chaser toward the target. The operational principle of spacecraft thrusters, requiring a minimum activation time that leads to the existence of a control ...
Pedro Taborda, Hugo Matias, Daniel Silvestre, Pedro Lourenço   +3 more
openaire   +2 more sources