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Wyszukujesz frazę "time-optimal control" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
A computational scheme for decentralized time-optimal resource allocation in a sequence of projects of activities under constrained resource
Autorzy:
Stankiewicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/411126.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
project of activities
resource allocation
time-optimal control
dynamical system
decentralized control
Opis:
We consider a sequence of projects of independent activities; each project composed of activities available for realization at the same time. It is assumed that the activities are continuous dynamical systems whose dynamics depend continuously on the allotted amounts of the resource, and the initial and terminal states are fixed. The problem is to allocate a renewable, continuously divisible resource (e.g., power, fuel flow, money per time unit, approximate manpower) to the activities in order to minimize the performance time of the sequence of projects under the assumption that the allowable level of the total usage of the resource is constant. Although the solution to this problem is known in the literature, nevertheless there is a lack of effective computational algorithms for the time-optimal resource allocation, especially in the case of really large projects. In this paper a decentralized two-level control scheme using the time-decomposition is proposed to find the time-optimal resource allocation in a sequence of projects. The price mechanism is applied to coordinate the lower level tasks of the optimal resource allocation in the successive time intervals determined by the moments at which the successive projects are available for realization. Necessary and sufficient conditions to ensure the determination of the optimal resource allocation according to the method proposed are stated. The problems connected with the numerical realization of the scheme are discussed and the resulting computer algorithm is outlined.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2016, 5, 3; 83-94
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal laws of gear shift in automotive transmissions
Autorzy:
Hashchuk, P.
Pelo, R.
Powiązania:
https://bibliotekanauki.pl/articles/411074.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
automobile
transmission
gear shift
optimal law
transmission excellence
control algorithms
optimality criterions
time acceleration
fuel consumption
Opis:
In the article the influence of the moment of beginning of shifting gears on the efficiency of acceleration of the vehicle has been evaluated – on the fuel consumption at a given level of dynamism of the car. Different programs of switching gear at different values of the length of the friction trailing have been studied. Arguments are made in favor of the fact that the gearshift processes should not be too fast and that the work of friction trailing is not decisive in view of the need to increase the energy efficiency of the car. It is emphasized that between the laws of gear shifting, which are optimal considering the fuel economy, which, having in mind the dynamism, there are no fundamental differences. On the basis of the information obtained, it is concluded that the real variety of transmissions is unreasonably excessive and even harmful, since optimality is usually monotonous.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2018, 7, 2; 59-69
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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