Results 71 to 80 of about 1,463,226 (220)

Deep learning for structure-preserving universal stable Koopman-inspired embeddings for nonlinear canonical Hamiltonian dynamics

Machine Learning: Science and Technology
Discovering a suitable coordinate transformation for nonlinear systems enables the construction of simpler models, facilitating prediction, control, and optimization for complex nonlinear systems.
Pawan Goyal, Süleyman Yıldız, Peter Benner   +2 more
doaj   +1 more source

Distributed Energy Resources Integration in AC Grids: a Family of Passivity-Based Controllers

Revista Iberoamericana de Automática e Informática Industrial RIAI, 2019
This paper presents the design and application of passivity–based control theory for distributed energy resources (DERs) integration through voltage source converters (VSC) in ac single–phase grids.
Oscar Danilo Montoya, Walter Gil-González, Sofía Avila-Becerril, Alejandro Garces, Gerardo Espinosa-Pérez   +4 more
doaj   +1 more source

Distributed Coordinated Control of Offshore Doubly Fed Wind Turbine Groups Based on the Hamiltonian Energy Method

, 2017
To support doubly fed wind turbine (DFWT) groups in offshore wind farms, this paper proposes a distributed coordinated control based on the Hamiltonian energy theory.
B. Wang, Qiuxuan Wu, Mingyang Tian, Qi Hu   +3 more
semanticscholar   +1 more source

Time-periodic Evans approach to weak KAM theory [PDF]

arXiv, 2017
We study the time-periodic version of Evans approach to weak KAM theory. Evans minimization problem is equivalent to a first oder mean field game system. For the mechanical Hamiltonian we prove the existence of smooth solutions. We introduce the corresponding effective Lagrangian and Hamiltonian and prove that they are smooth.
arxiv  

Engineering non-equilibrium quantum phase transitions via causally gapped Hamiltonians

New Journal of Physics, 2018
We introduce a phenomenological theory for many-body control of critical phenomena by engineering causally-induced gaps for quantum Hamiltonian systems. The core mechanisms are controlling information flow within and/or between clusters that are created ...
Masoud Mohseni, Johan Strumpfer, Marek M Rams   +2 more
doaj   +1 more source

Optimal Control of Engine Warmup in Hybrid Vehicles

Oil & Gas Science and Technology, 2016
An Internal Combustion Engine (ICE) under cold conditions experiences increased friction losses due to a high viscosity of the lubricant. With the additional control freedom present in hybrid electric vehicles, the losses during warmup can be minimized ...
van Reeven Vital, Hofman Theo, Willems Frank, Huisman Rudolf, Steinbuch Maarten   +4 more
doaj   +1 more source

On second order conditions for singular optimal control of port-Hamiltonian systems [PDF]

arXiv
We study singular optimal control problems of port-Hamiltonian (descriptor) systems. We employ general control-affine cost functionals that include as a special case the energy supplied to the system. We first derive optimality conditions for the case of ordinary differential equations with and without control bounds by applying the general theory to ...
arxiv  

Time-dependent Gutzwiller simulation of Floquet topological superconductivity

Communications Physics
Periodically driven systems provide a novel route to control the topology of quantum materials. In particular, Floquet theory allows an effective band description of periodically-driven systems through the Floquet Hamiltonian.
Takahiro Anan, Takahiro Morimoto, Sota Kitamura   +2 more
doaj   +1 more source

Operator theoretic approach to optimal control problems characterized by the Caputo fractional differential equations

Results in Control and Optimization, 2023
In this paper, our aim is to solve an optimal control problem by using an operator theoretic approach in the sense of Caputo fractional derivative. We first reduce the fractional dynamical system into an equivalent Hammerstein operator equation and then ...
M. Vellappandi, V. Govindaraj
doaj  

Implicit Lyapunov Control for the Quantum Liouville Equation [PDF]

Control Theory and Informatics,Vol. 4, No. 6, pp. 21- 32, 2014, 2012
A quantum system whose internal Hamiltonian is not strongly regular or/and control Hamiltonians are not full connected, are thought to be in the degenerate cases. In this paper, convergence problems of the multi-control Hamiltonians closed quantum systems in the degenerate cases are solved by introducing implicit function perturbations and choosing an ...
arxiv