Results 251 to 260 of about 102,554 (312)

DAMPER FOR SPEAKER AND SPEAKER USING THE DAMPER

The Journal of the Acoustical Society of America, 2013
To realize a speaker having a good sound quality by reducing the resonance of the roll part of a damper for the speaker without lowering sound pressure and providing the characteristics of good linearity thereto. The damper is composed of at least two or more roll parts, and an elastic body is provided on at least one side or both sides of the outer ...
Kimihiro Ando, Kazuyoshi Umemura
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Nutation Dampers vs Precession Dampers for Asymmetric Spacecraft

Journal of Guidance and Control, 1978
The energy dissipation efficiencies of ball-in-tube dampers oriented with their sensitive axes orthogonal to (nutation) and parallel to (precession) the nominal spin axis of an asymmetric spacecraft are studied using the energy-sink method and numerical integration. Energy-sink equations for each of the two types of dampers are obtained in the forms of
J. COCHRAN, JR., J. THOMPSON
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Investigation of a colloidal damper

Journal of Colloid and Interface Science, 2003
A novel application of nanotechnology in the field of mechanical engineering, called colloidal damper (CD), is investigated. This device is complementary to the hydraulic damper (HD), having a cylinder-piston construction. Particularly for CD, the hydraulic oil is replaced by a colloidal suspension, which consists of a mesoporous matrix and a lyophobic
C V, Suciu, T, Iwatsubo, S, Deki
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Optimization Design of Impact Dampers and Particle Dampers

2020
Regarding the design of particle impact dampers, there are many design parameters affecting their damping performance, such as the mass ratio of the PID to the primary structure, number, size, and material of the particles, restitution and friction coefficients of the particles, gap clearance, and filling ratio (volume fraction).
Zheng Lu, Sami F. Masri, Xilin Lu
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Series damper actuator system based on MR fluid damper

Robotica, 2006
In our recent work, we have proposed a novel force control actuator system called series damper actuator (SDA). We have since built an SDA system based on magneto-rheological fluid (MR) damper. In this paper, the dynamics property of SDA system based on the MR fluid damper (SMRDA) is investigated.
Chee-Meng Chew, Geok-Soon Hong, Wei Zhou
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Cognitive dampers for structures

2013 IEEE 4th International Conference on Cognitive Infocommunications (CogInfoCom), 2013
A cognitive/semi-active control law for an optimal stability of the simple structure is targeted to be developed. It is found that the use of Quadratic Feedback Control to design the control law is not possible for this kind of system. Also another attempt to find the control law using the Jacobi Hamilton Inequality for this kind of system is presented
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On the Theory of the Acceleration Damper

Journal of Applied Mechanics, 1956
Abstract The acceleration damper reduces the vibration of a mechanical system through momentum transfer by collision and conversion of mechanical energy into heat. A typical unit consists of a mass particle moving in a container fixed to the primary vibrating system.
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A stay cable with viscous damper and tuned mass damper

Australian Journal of Structural Engineering, 2015
AbstractStay cables in cable-stayed bridges are vulnerable to dynamic excitation because their intrinsic damping is very low. The cables have often been exhibiting undesirable and excessive vibrations which result in increasing maintenance frequency and disruption to normal operations of the entire bridges.
Viet Hung Cu, Bing Han
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Disposable Diaper Damper

Pediatrics, 1988
To the Editor.— The mother of one of my patients recently called me with the following information. She had purchased some Kleenex Huggies Super-Trim Diapers. When a diaper rash developed, she tore the diaper in half and found it contained small lemon-colored gelatin-like crystals inside the diaper.
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