Topic
Rotational speed
About: Rotational speed is a research topic. Over the lifetime, 23327 publications have been published within this topic receiving 151696 citations. The topic is also known as: speed of revolution & revolution rate.
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Patent•
09 Oct 1996
TL;DR: In this article, an annular magnetic source circumferentially disposed on the rotatable member and rotatable therewith, and a directional magnetometer having a toroidal core, disposed at a location in proximity to the magnetic source, was used to detect the amplitude and/or change of amplitude of only a tangential magnetic flux field component of a magnetic source.
Abstract: In a preferred embodiment, an apparatus for detecting the angular position, rotational speed, and/or acceleration of a rotatable member, including: an annular magnetic source circumferentially disposed on the rotatable member and rotatable therewith; a directional magnetometer having a toroidal core, disposed at a location in proximity to the magnetic source, with the rotatable member passing through the toroidal core, the directional magnetometer being oriented so as to detect the amplitude and/or change of amplitude of only a tangential magnetic flux field component of the magnetic source, and to provide outputs indicative thereof; and apparatus to receive the outputs and to determine therefrom the angular position, rotational speed, and/or acceleration of the rotatable member.
39 citations
Patent•
23 Jun 1999
TL;DR: In this article, a speed ratio control operation of an automatic transmission for a vehicle is controlled by using an oil pressure supplied from a oil pump, and a stationary vehicle condition determination circuit determines that the vehicle is operating under the conditions that the brake is operated and vehicle speed is below a fixed value.
Abstract: A speed ratio control operation of an automatic transmission for a vehicle is controlled by using an oil pressure supplied from a oil pump (16). At least a circuit (22) which sets a rotation speed of the oil pump (16) to a first pump rotation speed in order to maintain a necessary minimum line pressure to control a variable mechanism, a stationary vehicle condition determination circuit (24) which determines that the vehicle is operating under the conditions that the brake is operated and vehicle speed is below a fixed value, and a circuit (23) which sets a second pump rotation speed which is lower than the first pump rotation speed when stationary vehicle conditions are met are provided. The rotation speed is lowered to the second pump rotation speed when the vehicle stationary conditions are met which results in reduced energy consumption and reduced noise pollution.
39 citations
TL;DR: In this paper, a high-speed camera was employed to obtain continuous and clear images of liquid flow, and the effects of various operating conditions such as the number of rotor-ring/stator-ring layers, the rotation speed and the liquid volumetric flow rate on the average diameter as well as the average velocity of liquid droplets and the average angle of velocity vector were investigated.
39 citations
TL;DR: Of the four mechanisms present in rotating filters to reduce pore plugging and cake build-up, axial shear, rotationalShear, centrifugal sedimentation and vortical motion, the evidence suggests rotational shear is the dominant mechanism, although the other mechanisms still play minor roles.
39 citations