Gravity enhanced acoustic levitation method and apparatus

Simulating the Moon’s Gravity on Earth Using Magnetic Levitation

Coarse-fine residual gravity cancellation system with magnetic levitation

This paper describes a six degrees-of-freedom active experiment isolation system designed to cancel out residual accelerations during "zero-g" parabolic ights (e.g., NASA KC-135 ights). The isolation system consists of a ne-motion magnetic levitator whose stator is transported by a conventional coarse-motion stage or by a robot. The levitator uses wide-gap voicecoil actuators and has the dual p...

Acoustic-gravity nonlinear structures

A catalogue of nonlinear vortex structures associated with acoustic-gravity perturbations in the Earth’s atmosphere is presented. Besides the previously known KelvinStewart cat’s eyes, dipolar and tripolar structures, new solutions having the form of a row of counter-rotating vortices, and several weakly two-dimensional vortex chains are given. The existence conditions for these nonlinear struc...

Erratum: Acoustic levitation in the presence of gravity [J. Acoust. Soc. Am. 86(2), 777-787 (1989)].

Solution of propagation of acoustic-gravity waves in the atmosphere using finite difference method of order two

Investigating waves propagation’s equation in the atmosphere is one of the important and widely used issues in various sciences, which has attracted many researchers. A type of propagating waves is an acoustic-gravity wave. These type of waves have a lot of stationarity properties and can be propagate to a high altitude in the atmosphere. The equation of acoustic-gravity wave propagation is a h...