Modeling and Simulation of Helicopter Cabin Electromagnetic Environment

2011 ◽  
Vol 383-390 ◽  
pp. 5615-5620
Author(s):  
Liu Yang ◽  
Yun Feng Jia ◽  
Dong Lin Su
Keyword(s):  
Integral Equation ◽  
Electric Field ◽  
Electromagnetic Compatibility ◽  
Fast Multipole Method ◽  
Original Model ◽  
Preliminary Design ◽  
Electromagnetic Environment ◽  
Simulation Results ◽  
Field Integral ◽  
Computing Speed

Electromagnetic environment (EME) in helicopter cabin is one of the most important indexes for electromagnetic compatibility (EMC) on airborne platform. The simulation results were not accurate enough because of the difficulties in accurately modeling and the large computation. Due to the inaccuracy of the former modeling method which used the typical geometric, the professional software ICEMCFD/AI*Environment (AIE) was employed to restore the helicopter’s original model, based on the obtain of the accurate helicopter model, the Multi-layer Fast Multipole Method (MLFMM) and Combined Field Integral Equation (CFIE) were employed to analyze the variation of the electric field in the helicopter cabin versus the frequency and other factors with a VHF antenna mounted on the helicopter. Both accuracy and computing speed were concerned, the results have some guidance significance to the EMC preliminary design on airborne platform.

scholarly journals The effect of near-zone preconditioning on electromagnetic integral equations of first and second kind

2013 ◽  
Vol 11 ◽  
pp. 61-65 ◽  
Author(s):  
O. Wiedenmann ◽  
T. F. Eibert
Keyword(s):  
Integral Equation ◽  
Electric Field ◽  
Integral Equations ◽  
Fast Multipole Method ◽  
Surface Integral ◽  
Electric Field Integral Equation ◽  
Integral Methods ◽  
Near Zone ◽  
Field Integral ◽  
Linear Equation Systems

Abstract. The linear equation systems which arise from the discretization of surface integral equations are conveniently solved with iterative methods because of the possibility to employ fast integral methods like the Multilevel Fast Multipole Method. However, especially integral equations of the first kind often lead to very ill-conditioned systems, which require the usage of effective preconditioners. In this paper, the regularization property of near-zone preconditioning operators on the Electric Field Integral Equation is demonstrated and investigated for problems of different size. Furthermore, comparisons are drawn to second-kind integral equations such as the Combined Field Integral Equation.

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