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JournalISSN: 1898-4088

Acta Mechanica et Automatica 

De Gruyter Open
About: Acta Mechanica et Automatica is an academic journal published by De Gruyter Open. The journal publishes majorly in the area(s): Finite element method & Magnetorheological fluid. It has an ISSN identifier of 1898-4088. It is also open access. Over the lifetime, 874 publications have been published receiving 3077 citations. The journal is also known as: AMA (journal).


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Journal Article
TL;DR: In this paper, conditions for the positivity of fractional linear electrical circuits composed of resistors, coils, condensators and voltage (current) sources are established, and it is shown that the fractional electrical circuits of R, C, e type are reachable if and only if the conductances between their nodes are zero.
Abstract: Conditions for the positivity of fractional linear electrical circuits composed of resistors, coils, condensators and voltage (current) sources are established. It is shown that: 1) the fractional electrical circuit composed of resistors, coils and voltage source is positive for any values of their resistances, inductances and source voltages if and only if the number of coils is less or equal to the number of its linearly independent meshes, 2) the fractional electrical circuit is not positive for any values of its resistances, capacitances and source voltages if each its branch contains resistor, capacitor and voltage source, It is also shown that the fractional positive electrical circuits of R, C, e type are reachable if and only if the conductances between their nodes are zero and the fractional positive electrical circuits of R, L, e type are reachable if and only if the resistances belonging to two meshes are zero.

69 citations

Journal Article
TL;DR: In this paper, the stability problem of linear time-invariant continuous-time systems of fractional order, standard and positive, described by the state space model, is considered.
Abstract: The paper considers the stability problem of linear time-invariant continuous-time systems of fraction al order, standard and positive, described by the state space model Review of previous results is given and some new methods for sta- bility checking are presented Considerations are il lustrated by numerical examples and results of comp uter simulations

35 citations

Journal Article
TL;DR: In this article, the authors considered the solution of the fractional differential equations and proposed some improvements of computational algorithms for the fractional one-dimensional dif fusion-wave equation.
Abstract: In this paper we consider the solution of the fract ional differential equations. In particular, we con sider the numer- ical solution of the fractional one dimensional dif fusion-wave equation. Some improvements of computational algorithms are suggested. The considerations have been illustr ated by examples.

33 citations

Journal ArticleDOI
TL;DR: In this article, the authors analyzed the methods commonly used by researchers for selecting friction materials and reducing the costs of identifying the properties of new products, and presented different set-ups of research stations, as well as the advantages and drawbacks of each method.
Abstract: Abstract Disc brakes in passenger cars are extremely important due to safety concerns. Their operational quality largely rests on the conditions of contact between the working elements, which mainly consists offlat and dry sliding. The tribological phenomena thatoccur during braking are, unfortunately, extremely complex and difficult to recreate in laboratory settings. Many scientific institutes conduct research to improve our understanding of these phenomena. The results they present make it possible to continuously simplify the procedures for selecting friction materials and reducing the costs of identifying the properties of new products. This article analyses the methods commonly used by researchers. It also presents different set-ups of research stations, as well as the advantages and drawbacks of each method.

30 citations

Book ChapterDOI
TL;DR: In this article, the unconstrained local controllability problem of finite-dimensional fractional discrete-time (DFDT) systems is addressed, where the authors consider the control of semilinear FDTs.
Abstract: Controllability problems studied in this Chapter concern semilinear fractional discrete-time control systems. More precisely, in the present paper unconstrained local controllability problem of finite-dimensional fractional discrete-time semilinear systems is addressed.

28 citations

Performance
Metrics
No. of papers from the Journal in previous years
YearPapers
202354
202250
202130
202029
201938
201847