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, an analytical expression for the tilting inertia moment on the cylinder block by means of vector analysis was presented, and experiments on an EHA pump prototype were carried out at high speeds of up to 10,000 r/min.
61 citations
TL;DR: In this article, a new optimization method for dynamic design of planar linkage with clearances at joints is presented, where the general consideration is to optimize the mass distribution of links to reduce the change of joint forces.
Abstract: This paper presents a new optimization method for dynamic design of planar linkage with clearances at joints. The general consideration is to optimize the mass distribution of links to reduce the change of joint forces. The mass, the center position of mass and the moment of inertia the moving links are taken as the optimizing variables. The objective functions are taken as the changes of the amplitude and direction of the joint forces and they are minimized. The optimized result shows that the magnitude of joint force can be controlled hardly to change and the direction of joint force can be controlled to change smoothly with respect to the crank angle, although the clearances exist at the joints. The link shape can be formed with the optimized variables by using the small element superposing method (SESM) and a design example is given.
61 citations
TL;DR: Graph spectra-based controlled islanding method is used to identify the impact of reduced inertia on the spectral properties of power system graphs and, thus, coherent generator grouping and validate the effectiveness of the proposed algorithm in the case of low inertia systems.
Abstract: The inertia of modern power systems is decreasing and becoming more variable as more inverter-connected renewable energy sources and loads are integrated. This leads to a low and time-varied inertia power system that is more sensitive to disturbances and may not be robust enough to survive large disturbances. How to protect such a low and time-varied inertia system from blackouts is in question. This paper tries to answer this question using a graph spectra-based controlled islanding method. Eigenvector sensitivity, with respect to inertia, is used to identify the impact of reduced inertia on the spectral properties of power system graphs and, thus, coherent generator grouping. Constrained spectral clustering is then used to find the islanding boundary with minimal power-flow disruption to island low inertia systems. Simulation results, obtained using the IEEE 9-bus and 118-bus test systems, validate the effectiveness of the proposed algorithm in the case of low inertia systems.
61 citations
TL;DR: In this article, it is shown that it is possible to make metallic spheres sufficiently small and uniform in density and in surface texture to allow verification of Stokes's law in less viscous oils.
Abstract: It is possible to make metallic spheres sufficiently small and uniform in density and in surface texture to allow of the verification of Stokes's law in the less viscous oils. One of these spheres ...
61 citations
TL;DR: In this paper, a battery of pressure transducers was mounted along the external contour of a cylinder placed at half water depth, while four wave gauges were located close to the cylinder and an ultrasonic sensor behind the paddle to measure its displacement.
61 citations