Institution
Lord Corporation
Company•Cary, North Carolina, United States•
About: Lord Corporation is a company organization based out in Cary, North Carolina, United States. It is known for research contribution in the topics: Magnetorheological fluid & Adhesive. The organization has 730 authors who have published 1109 publications receiving 37276 citations.
Topics: Magnetorheological fluid, Adhesive, Damper, Elastomer, Coating
Papers published on a yearly basis
Papers
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TL;DR: In this article, a model for controllable fluid dampers is proposed that can effectively portray the behavior of a typical magnetorheological (MR) damper and compared with experimental results for a prototype damper.
Abstract: Semiactive control devices have received significant attention in recent years because they offer the adaptability of active control devices without requiring the associated large power sources. Magnetorheological (MR) dampers are semiactive control devices that use MR fluids to produce controllable dampers. They potentially offer highly reliable operation and can be viewed as fail-safe in that they become passive dampers should the control hardware malfunction. To develop control algorithms that take full advantage of the unique features of the MR damper, models must be developed that can adequately characterize the damper's intrinsic nonlinear behavior. Following a review of several idealized mechanical models for controllable fluid dampers, a new model is proposed that can effectively portray the behavior of a typical MR damper. Comparison with experimental results for a prototype damper indicates that the model is accurate over a wide range of operating conditions and is adequate for control design an...
1,897 citations
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TL;DR: A type of force generator which can respond to general feedback signals from a vibrating system in order to control the vibration but which does not require the power supply of a servomechanism is described.
Abstract: A type of force generator which can respond to general feedback signals from a vibrating system in order to control the vibration but which does not require the power supply of a servomechanism is described. Computer simulation studies show that performance comparable to that of fully active vibration control systems can be achieved with the semi-active type of device. Physical embodiments of the concept are discussed and compared to hardware used in active and passive vibration control systems.
1,315 citations
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TL;DR: In this paper, a clipped-optimal control strategy based on acceleration feedback for controlling magnetorheological dampers is proposed to reduce structural responses due to seismic loads, and a numerical example, employing a newly developed model that accurately portrays the salient characteristics of the MR dampers, is presented to illustrate the effectiveness of the approach.
Abstract: Control of civil engineering structures for earthquake hazard mitigation represents a relatively new area of research that is growing rapidly. Control systems for these structures have unique requirements and constraints. For example, during a severe seismic event, the external power to a structure may be severed, rendering control schemes relying on large external power supplies ineffective. Magnetorheological (MR) dampers are a new class of devices that mesh well with the requirements and constraints of seismic applications, including having very low power requirements. This paper proposes a clipped-optimal control strategy based on acceleration feedback for controlling MR dampers to reduce structural responses due to seismic loads. A numerical example, employing a newly developed model that accurately portrays the salient characteristics of the MR dampers, is presented to illustrate the effectiveness of the approach.
1,296 citations
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TL;DR: Magnetorheological (MR) fluids, foams and elastomers comprise a class of smart materials whose rheological properties may be controlled by the application of an external magnetic field.
1,104 citations
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23 Sep 2003TL;DR: In this paper, the transponder is connected to the receiver coil or antenna to provide greater current to the sensor or other power-using device than would be available to the sensors or other devices if the sensor and other devices were connected between the first and second end.
Abstract: An electronic system includes a reader and a remotely powered and remotely interrogated sensor transponder. The sensor transponder includes a coil or an antenna, a switched reactance circuit, a processor, and a sensor. The sensor transponder receives power radiated from the reader to the coil or antenna. The sensor uses the power for sensing. The sensor transponder is capable of processing sensor data in the processor and transmitting the sensor data to the reader using the switched reactance circuit. In one embodiment, the receiver coil or antenna is part of a resonant tank circuit which includes an impedance matching circuit. The impedance matching circuit is connected to the receiver coil or antenna to provide greater current to the sensor or other power-using device than would be available to the sensor or other power-using device if the sensor or other power-using device were connected between the first and second end. The impedance matching circuit can be two or more taps to the coil or antenna.
934 citations
Authors
Showing all 731 results
Name | H-index | Papers | Citations |
---|---|---|---|
Lawrence A. Bergman | 56 | 415 | 13127 |
J. David Carlson | 45 | 109 | 8876 |
John R. Kitchin | 38 | 101 | 17951 |
Mehdi Ahmadian | 37 | 258 | 4576 |
Steven W. Arms | 35 | 86 | 5315 |
Mark R. Jolly | 35 | 97 | 6743 |
Christopher P. Townsend | 33 | 74 | 4885 |
Robert T. Mathers | 27 | 76 | 2384 |
Tarek Agag | 27 | 47 | 2086 |
Douglas E. Ivers | 22 | 39 | 1323 |
Lane R. Miller | 22 | 32 | 1131 |
Dorian A. Canelas | 21 | 38 | 2790 |
Daniel Mellinger | 20 | 25 | 5592 |
Steve C. Southward | 20 | 80 | 1987 |
David L. Churchill | 19 | 36 | 1825 |