Measuring the Velocity of Terrestrial Objects in the Earth s Magnetic Field Using the Lorentz Force Law
Abstract
This proposal will investigate the feasibility of using the electromotive force in the Earths magnetic field as a means of velocity measurement for use in dead reckoning navigation. In order to do this, three phases of study are proposed. The First Phase explores moving electronic materials in magnetic fields from a theoretical perspective with simplified models. This requires a careful study of the relativistic implications of currents and charge transport in static magnetic fields. Additionally, we will review the literature in this area which includes contradictory positions regarding the Lorentz force law in moving frames of reference. The Second Phase of the project will demonstrate and evaluate three rival designs for an onboard measurement device using the principles and concepts from the first phase. Three possible device designs are reported below. At this stage, we will also include and evaluate any important device concepts that have been realized in the first phase. The evaluation of the concept designs will include basic mathematical models and analysis. In addition, velocity sensitivities will be explored with regard to the magnitude of the magnetic field along with other important variables. These analytical models will allow an optimization of the device design so that the effects can be magnified and variables of the problem explored. The Third Phase will confirm the candidate designs using more detailed Monte Carlo simulations of charge transport in a moving magnetic field. Monte Carlo simulations of device material properties and handle transport processes in a semiclassical way. Monte Carlo simulations also allow for the inclusion of a model of the electronic band structure whereby material properties and asymmetries in the crystal structure could be differentiated and, if possible, exploited.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 08, 2020
- Source ID
- N000142012317
Entities
People
- Nicholas A. Mecholsky
Organizations
- Office of Naval Research
- The Catholic University of America
- United States Navy