Results 91 to 100 of about 3,274,537 (356)

Research of movement speed control of scanning probe for draw shaft

open access: yesGong-kuang zidonghua, 2014
In order to solve image blurring, distortion and discontinuousness caused by unstable movement speed of scanning probe of panoramic scanner for draw shaft, structure of movement device of panoramic scanner was analyzed and relationship model between ...
HU Liangzhi   +4 more
doaj   +1 more source

Accurate Tracking of Aggressive Quadrotor Trajectories using Incremental Nonlinear Dynamic Inversion and Differential Flatness

open access: yes, 2020
Autonomous unmanned aerial vehicles (UAVs) that can execute aggressive (i.e., high-speed and high-acceleration) maneuvers have attracted significant attention in the past few years.
Karaman, Sertac, Tal, Ezra
core   +1 more source

Simulation of Inhomogeneous Refractive Index Fields Induced by Hot Tailored Forming Components

open access: yesAdvanced Engineering Materials, EarlyView.
This article presents a simulation model for simulating inhomogeneous refractive index fields (IRIF) in hot‐forged components, accounting for thermal influences and complex geometries. Through this simulation, a priori knowledge about the propagation of the IRIF can be obtained, allowing for the positioning of the component or an optical measurement ...
Pascal Kern   +3 more
wiley   +1 more source

Sensorless control system for assistive robotic ankle-foot

open access: yesInternational Journal of Advanced Robotic Systems, 2018
This article presents a novel sensorless control system of assistive robotic ankle-foot prosthesis, two estimation algorithms were developed and an analogy between them has been made.
Mouaz Al Kouzbary   +2 more
doaj   +1 more source

Ultradispersion microstructure and phase composition formation during intensive metal forming [PDF]

open access: yes, 2013
It was shown in this paper how rate, speed and temperature of forming influence on core size, as well as influence of the cooling speed on phase composition of construction steels.
Bogatov, A., Leshchev, L.
core  

Swimming Efficiency of Bacterium Escherichia Coli

open access: yes, 2005
We use in vivo measurements of swimming bacteria in an optical trap to determine fundamental properties of bacterial propulsion. In particular, we determine the propulsion matrix, which relates the angular velocity of the flagellum to the torques and ...
C. Yeung   +12 more
core   +2 more sources

Angular speed control of an induction motor via a solar powered boost converter-voltage source inverter combination

open access: yesEnergy, 2017
This paper proposes a maximum power point tracking (MPPT) algorithm for the development of a three-phase induction motor angular speed drive. A Dc-to-Dc boost power converter, powered by photovoltaic (PV) panels, feeds the three-phase power inverter. The
J. Linares-Flores   +6 more
semanticscholar   +1 more source

Influence of Cooling Rate on Primary Silicon Size in Hypereutectic Al–Si Alloy Fabricated by Laser Powder Bed Fusion

open access: yesAdvanced Engineering Materials, EarlyView.
Al–Si alloys are particularly in demand for automotive and electronic applications, thanks to their excellent wear and thermal properties. Nevertheless, when processed by conventional methods with low cooling rates, the coarse primary Si phases are responsible for increasing brittleness and inducing crack propagation.
Layla Shams Tisha   +3 more
wiley   +1 more source

INFLUENCE OF ELASTIC AND INERTIAL PARTS ON TRANSMISSION EFFICIENCY OF THE TRACTIVE VEHICLE [PDF]

open access: yesAvtomobilʹnyj Transport (Harʹkov), 2015
The concept – elastic efficiency of transmission is introduced and the condition of its equality to zero is determined. The analytical expressions that allow with taking into account a pliability of elastic parts to determine the angular speed of an ...
N. Podryhalo
doaj  

Vibration-based angular speed estimation for multi-stage wind turbine gearboxes

open access: yes, 2017
Most processing tools based on frequency analysis of vibration signals are only applicable for stationary speed regimes. Speed variation causes the spectral content to smear, which encumbers most conventional fault detection techniques.
C. Peeters   +4 more
semanticscholar   +1 more source

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