APPARATUS AND METHOD FOR DETERMINING STATISTICAL MEAN AND MAXIMUM EXPECTED VARIANCE OF ELECTROMAGNETIC ENERGY TRANSMISSION BETWEEN COUPLED CAVITIES

• US 20160103165A1
• Filed: 12/16/2015
• Published: 04/14/2016
• Est. Priority Date: 04/12/2011
• Status: Active Grant

• Current Assignee: Dassault Systemes Americas Corp. (Dassault Systemes SA), Paul G. Bremner
• Original Assignee: Dassault Systèmes Simulia Corp.
• Inventors: Langley, Robin Stewart, Kovalevsky, Louis, Barbarulo, Andrea
• Granted Patent: US 10,379,147 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01N 27/02 by investigating impedance
• CPC Class Codes: G01R 13/02 for displaying measured electric variables in digital form
• CPC Class Codes: G01R 21/133 by using digital technique
• CPC Class Codes: G01R 23/16 Spectrum analysis; Fourier analysis
• CPC Class Codes: G01R 29/0814 Field measurements related to measuring influence on or from apparatus, components or humans EMC, EMI and similar testing in general G01R31/001, e.g. in ESD, EMI, EMC, EMP testing, measuring radiation leakage; detecting presence of micro- or radiowave emitters; dosimetry; testing shielding; measurements related to lightning
• CPC Class Codes: G01R 29/0892 Details related to signal analysis or treatment; presenting results, e.g. displays; measuring specific signal features other than field strength, e.g. polarisation, field modes, phase, envelope, maximum value
• CPC Class Codes: G01V 2210/6163 Electromagnetic
• CPC Class Codes: G01V 3/165 operating with magnetic or electric fields produced or modified by the object or by the detecting device with electromagnetic waves G01V3/17
• CPC Class Codes: G06F 17/18 for evaluating statistical data , e.g. average values, frequency distributions, probability functions, regression analysis forecasting specially adapted for a specific administrative, business or logistic context G06Q10/04
• CPC Class Codes: G06F 30/23 using finite element methods [FEM] or finite difference methods [FDM]

Abstract

Some embodiments include an apparatus for determining statistical mean and maximum expected of electromagnetic energy transmission between coupled cavities. Other embodiments of related apparatuses and methods are also disclosed.

Claims

1. ) An apparatus configured to determine one or more parameters related to one or more electromagnetic fields in a first cavity coupled to a second cavity, at least one electromagnetic wave creation element being located in the second cavity, an electrical system comprising the first cavity, the second cavity, and the at least one electromagnetic wave creation element, the apparatus comprising:

a processing module; and

a non-transitory memory storage module operable to store computer instructions configured to run on the processing module and perform acts of;

receiving two or more measurement parameters related to the first cavity and the second cavity;

receiving one or more electrical parameters of the at least one electromagnetic wave creation element;

determining an energy matrix of the one or more electromagnetic fields in the first cavity and the second cavity;

determining a mean energy of the one or more electromagnetic fields in the first cavity and the second cavity; and

determining an energy variance of the one or more electromagnetic fields in the first cavity and the second cavity.

2. ) The apparatus of claim 1 wherein the acts further comprise:

using the mean energy of the one or more electromagnetic fields in the first cavity and the second cavity and the energy variance of the one or more electromagnetic fields in the first cavity and the second cavity to determine one or more potential changes to at least one of (i) the first cavity, (ii) the second cavity, or (iii) the at least one electromagnetic wave creation element.

3. ) The apparatus of claim 2 wherein the acts further comprise:

determining a model of the one or more potential changes to the at least one of (i) the first cavity, (ii) the second cavity, or (iii) the at least one electromagnetic wave creation element.

4. ) The apparatus of claim 3 further comprising:

a display device coupled to the processing module;

wherein;

the acts further comprise displaying the model at the display device.

5. ) The apparatus of claim 1 wherein:

the first cavity comprises a first room in an immobile structure;

the second cavity comprises a second room in the immobile structure; and

the first room is coupled to the second room via an aperture.

6. ) The apparatus of claim 1 wherein one of:

the first cavity comprises a cockpit of a first aircraft, the second cavity comprises a cabin of the first aircraft, and the cabin is coupled to the cockpit via a first aperture;

the first cavity comprises a first room in a ship, the second cavity comprises a second room in the ship, and the first room is coupled to the second room via a second aperture;

the first cavity comprise a region exterior to a second aircraft, and the second cavity comprises an interior of the second aircraft;

or

the first cavity comprise a first compartment of a vehicle, and the second cavity comprises a second compartment of the vehicle.

7. ) The apparatus of claim 1 wherein:

the at least one electromagnetic wave creation element comprises at least one of a mobile communications device, an electromagnetic pulse weapon, or lightning.

8. ) A method of determining one or more electromagnetic fields in a first cavity coupled to a second cavity, at least one electromagnetic wave creation element being located in the second cavity and an electrical system comprising the first cavity, the second cavity, and the at least one electromagnetic wave creation element, the method comprises:

determining two or more physical parameters of the first cavity and the second cavity;

determining one or more electrical parameters of the at least one electromagnetic wave creation element;

executing one or more first computer instructions configured to determine an energy matrix for the electrical system;

executing one or more second computer instructions configured to determine a mean energy of the one or more electromagnetic fields in the first cavity and the second cavity; and

executing one or more third computer instructions configured to determine an energy variance of the one or more electromagnetic fields in the first cavity and the second cavity;

wherein;

the one or more first computer instructions, the one or more second computer instructions, and the one or more third computer instructions are configured to run at a processing module and configured to be stored at a non-transitory memory storage module.

9. ) The method of claim 8 further comprising:

executing one or more fourth computer instructions configured to use the mean energy of the one or more electromagnetic fields in the first cavity and the second cavity and the energy variance of the one or more electromagnetic fields in the first cavity and the second cavity to determine one or more potential changes to at least one of (i) the first cavity, (ii) the second cavity, or (iii) the at least one electromagnetic wave creation element;

wherein;

the one or more fourth computer instructions are configured to run at the processing module and configured to be stored at the non-transitory memory storage module.

10. ) The method of claim 9 wherein:

the one or more potential changes comprise at least one of;

adding electromagnetic shielding to at least one electrical component located in at least one of the first cavity or the second cavity;

or

moving the at least one electrical component located in the at least one of the first cavity or the second cavity.

11. ) The method of claim 9 further comprising:

applying the one or more one or more potential changes to the electrical system.

12. ) The method of claim 8 further comprising:

executing one or more fourth computer instructions configured to determine a model of the one or more electromagnetic fields in the first cavity based upon (i) the mean energy of the one or more electromagnetic fields in the first cavity and the second cavity and (ii) the energy variance of the one or more electromagnetic fields in the first cavity and the second cavity;

wherein;

the one or more fourth computer instructions are configured to run at the processing module and configured to be stored at the non-transitory memory storage module.

13. ) The method of claim 12 wherein:

executing the one or more fourth computer instructions comprises;

executing one or more fifth computer instructions configure to determine confidence bands of a maximum energy of the one or more electromagnetic fields in the first cavity; and

executing one or more sixth computer instructions configure to determine a probability that the maximum energy of the one or more electromagnetic fields in the first cavity is equal to or greater than a predetermined energy level.

14. ) The method of claim 13 further comprising:

when the probability that the maximum energy of the one or more electromagnetic fields in the first cavity is equal to or greater than the predetermined energy level is larger than a predetermined value, applying one or more potential changes to at least one of (i) the first cavity, (ii) the second cavity, or (iii) the at least one electromagnetic wave creation element.

15. ) The method of claim 8 wherein:

determining the two or more physical parameters of the first cavity and the second cavity comprises at least one of;

measuring at least part of one or more dimensions of the first cavity and the second cavity;

using design drawings of the first cavity and the second cavity to determine the one or more dimensions of the first cavity and the second cavity;

determining one or more dimensions of an aperture between the first cavity and the second cavity;

or

determining reflective properties at least one of one or more surfaces of the first cavity and the second cavity or one or more coatings on at least one surface of the one or more surfaces.

16. ) The method of claim 8 wherein:

determining the one or more electrical parameters of the at least one electromagnetic wave creation element comprises at least one of;

determining an electric power of one or more frequencies of electromagnetic waves emitted by the at least one electromagnetic wave creation element;

determining at least one frequency of interest from the one or more frequencies of the electromagnetic waves emitted by the at least one electromagnetic wave creation element;

or

determining at least one wave length of the electromagnetic waves emitted by the electromagnetic wave creation elements.

17. ) The method of claim 8 wherein:

executing the one or more first computer instructions comprises;

executing one or more fourth computer instructions configured to determine a loss factor for each of the first cavity and the second cavity;

executing one or more fifth computer instructions configured to determine coupling loss factors for the first cavity and the second cavity; and

executing one or more sixth computer instructions configured to determine a cavity modal density for each of the first cavity and the second cavity.

18. ) The method of claim 8 wherein:

executing the one or more second computer instructions comprises;

executing one or more fourth computer instructions configured to determine a loading factor for each of the first cavity and the second cavity;

executing one or more fifth computer instructions configured to determine a coupling factor for each pair of the first cavity and the second cavity that are coupled together;

executing one or more sixth computer instructions configured to determine an effective modal overlap factor for each of the first cavity and the second cavity;

executing one or more seventh computer instructions configured to determine the energy variance at an average energy of two or more emitted frequencies; and

the one or more electromagnetic fields comprise electromagnetic waves at the two or more emitted frequencies.

19. ) The method of claim 8 wherein:

executing the one or more third computer instructions comprises;

executing one or more fourth computer instructions configured to invert the energy matrix to determine the mean energy of the one or more electromagnetic fields in the first cavity and the second cavity.

20. ) A method of determining one or more electromagnetic fields in a first cavity coupled to a second cavity, at least one electromagnetic wave creation element being located in the second cavity and an electrical system comprising the first cavity, the second cavity, and the at least one electromagnetic wave creation element, the method comprises:

executing one or more first computer instructions configured to identify two or more physical parameters of the first cavity and the second cavity;

executing one or more second computer instructions configured to identify one or more electrical parameters of the at least one electromagnetic wave creation element;

executing one or more third computer instructions configured to determine a mean energy of the one or more electromagnetic fields in the first cavity and the second cavity;

executing one or more fourth computer instructions configured to determine an energy variance of the one or more electromagnetic fields in the first cavity and the second cavity;

executing one or more fifth computer instructions configured to use the mean energy of the one or more electromagnetic fields in the first cavity and the second cavity and the energy variance of the one or more electromagnetic fields in the first cavity and the second cavity to determine one or more potential changes to at least one of (i) the first cavity, (ii) the second cavity, or (iii) the at least one electromagnetic wave creation element; and

executing one or more sixth computer instructions configured to model the one or more potential changes;

wherein;

the one or more first computer instructions, the one or more second computer instructions, the one or more third computer instructions, the one or more fourth computer instructions, the one or more fifth computer instructions, and the one or more sixth computer instructions are configured to run at a processing module and configured to be stored at a non-transitory memory storage module.