Topic
Inertia
About: Inertia is a research topic. Over the lifetime, 12006 publications have been published within this topic receiving 164291 citations.
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TL;DR: In this paper, the authors address the dynamic balancing of multi-degree-of-freedom (multi-DOF) parallel mechanisms with multiple legs using the dynamic equivalence between point masses and arbitrary moving platforms.
Abstract: This paper addresses the dynamic balancing of multi-degree-of-freedom (multi-DOF) parallel mechanisms with multiple legs using the dynamic equivalence between point masses and arbitrary moving platforms. In this technique, proposed elsewhere, the mass and inertia of the moving platform are dynamically replaced by point masses located at the points of attachment of the legs to the platform and the mechanisms are balanced by considering each of the legs independently. In this paper, two, three, and four point masses are respectively discussed for different cases. Finally, some physical interpretations are given.
39 citations
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05 Nov 2015TL;DR: In this paper, the authors investigated the application of various designs of frequency control that support frequency stability and found that during step load changes and after the implementation of a continuous fluctuation in the system, the lower the total system's rotational inertia is, the more the frequency stabilization deteriorates.
Abstract: Any inequality in the overall system's power balance causes a variation in the kinetic energy of the rotating masses and thus a change in frequency. The inertia stored in all the rotational parts of the system is defined as a resistance to change and impedes sudden frequency variations. In general, synchronous machines consist of large and heavy rotating parts which serve as an obstacle against abrupt frequency deviations. This paper investigates the application of various designs of frequency control that support frequency stability. At a second phase, for improving the performance of frequency control, an additional controller is implemented, employing a fuzzy structure controller with virtual inertia response. It is shown that during step load changes and after the implementation of a continuous fluctuation in the system, the lower the total system's rotational inertia is, the more the frequency stabilization deteriorates. Nevertheless, through the aforementioned control strategies, frequency stability is enhanced. This study presents the results from the Researcher Exchange Program within the FP7 ELECTRA IRP European project.
39 citations
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TL;DR: In this article, the authors proposed a new approach to solve the non-convex economic dispatch problem using particle swarm optimization with smart inertia factor (PSO-SIF) algorithm in which, inertia coefficients are controlled with respect to cost function in each population.
Abstract: SUMMARY
This paper proposes a new approach to solve the non-convex economic dispatch problem using particle swarm optimization with smart inertia factor (PSO-SIF) algorithm in which, inertia coefficients are controlled with respect to cost function in each population. Hence, each population has unique inertia coefficient and as a result unique velocity in convergent direction for the best group solution. The new algorithm has been implemented on four test systems in different dimensions (6, 15, 20 and 40 units) with convex and non-convex cost functions. The numerical results have been compared with the results of a few PSO variants and some recently published results. The results prove the robustness and effectiveness of the proposed method and show that it could be used as a reliable tool for solving optimization problems. Copyright © 2013 John Wiley & Sons, Ltd.
39 citations
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TL;DR: Polizzotto et al. as discussed by the authors applied a multi-cell homogenization procedure to a nonhomogeneous body modelled as a simple material cell system, in conjunction with the principle of virtual work (PVW) for inertial actions (i.e. momenta and inertia forces).
39 citations
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TL;DR: In this article, the effects of the particle inertia and the crossing-trajectories effect on the particle dispersion were investigated, and it was shown that the effect of the crossing trajectories on particle motion is very significant.
Abstract: A set of second-order modelled equations for the motion of particles are presented. We consider the effects of the particle inertia and the crossing-trajectories effect on the particle dispersion. A simple case of a particle mixing layer in a decaying homogeneous turbulence for light and heavy particles is calculated. The results show that the crossing-trajectories effect on particle dispersion is very significant, while inertia only has a slight effect. This behaviour has been observed in experiments (Wells & Stock 1983) and is well predicted by an asymptotic analysis (Csanady, 1963). The calculation also shows that there is a significant difference between Favre-averaged particle velocity and conventional-averaged particle velocity in the low-particle-concentration region. All calculations are in good agreement with Wells & Stock's experimental data.
39 citations