Results 41 to 50 of about 46,345 (342)

Implementation and Experimental Verification of Flow Rate Control Based on Differential Flatness in a Tilting-Ladle-Type Automatic Pouring Machine

open access: yesApplied Sciences, 2019
In this paper, we study an advanced pouring control system using a tilting-ladle-type automatic pouring machine. In such a machine, it is difficult to precisely pour the molten metal into the pouring basin of the mold, as the outflow from the ladle can ...
Yoshiyuki Noda, Yuta Sueki
doaj   +1 more source

Thomas decompositions of parametric nonlinear control systems

open access: yes, 2012
This paper presents an algorithmic method to study structural properties of nonlinear control systems in dependence of parameters. The result consists of a description of parameter configurations which cause different control-theoretic behaviour of the ...
Lange-Hegermann, Markus, Robertz, Daniel
core   +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

Accuracy of Surface Plate Measurements - General Purpose Software for Flatness Measurement [PDF]

open access: yes, 1990
Flatness departures of surface plates are generally obtained from straightness measurements of lines on the surface. A computer program has been developed for on-line measurement and evaluation, based on the simultaneous coupling of measurements in all ...
Heuvelman, C.J., Meijer, J.
core   +4 more sources

Flatness-based control revisited: The HEOL setting

open access: yesComptes Rendus. Mathématique
We present the algebraic foundations of the HEOL setting, which combines flatness-based control and intelligent controllers, two advances in automatic control that have been proven in practice, including in industry.
Join, Cédric   +2 more
doaj   +1 more source

On the computation of $\pi$-flat outputs for differential-delay systems

open access: yes, 2014
We introduce a new definition of $\pi$-flatness for linear differential delay systems with time-varying coefficients. We characterize $\pi$- and $\pi$-0-flat outputs and provide an algorithm to efficiently compute such outputs.
Antritter, F.   +3 more
core   +3 more sources

Differential characters and cohomology of the moduli of flat connections [PDF]

open access: yesLetters in Mathematical Physics, 2018
22 ...
Marco Castrillón López   +1 more
openaire   +2 more sources

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

open access: yesFEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

Real-Time Trajectory Planning and Control for Constrained UAV Based on Differential Flatness

open access: yesInternational Journal of Aerospace Engineering, 2022
The trajectory planning of UAV with nonholonomic constraints is usually taken as differential algebraic equation to solve the optimal control problem of functional extremum under the condition of inequality constraints.
Dongli Wu   +4 more
doaj   +1 more source

Differential Flatness and Flatness Inspired Control of Aerial Manipulators based on Lagrangian Reduction

open access: yesCoRR, 2021
This paper shows that the dynamics of a general class of aerial manipulators, consist of an underactuated multi-rotor base with an arbitrary k-linked articulated manipulator, are differentially flat. Methods of Lagrangian Reduction under broken symmetries produce reduced equations of motion whose key variables: center-of-mass linear momentum, vehicle ...
Skylar X. Wei   +2 more
openaire   +2 more sources

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