Time domain physical optics algorithm based on CPU (Central Processing Unit) and GPU (Graphics Processing Unit) hybrid asynchronous parallel way

Abstract

The invention discloses a time domain physical optics algorithm based on a CPU (Central Processing Unit) and GPU (Graphics Processing Unit) hybrid asynchronous parallel way. The time domain physical optics algorithm comprises the following steps: 1, performing modeling through 3Dmax, and performing subdivision through triangular surface elements, wherein a derived model is in an OBJ format; 2, synchronously reading usable information such as vertex coordinates and a vertex quantity of the triangular surface elements in a model file (1), vertex numbers and a surface element quantity of the surface elements in the model file (2) and an incident electric field (3) respectively on three threads in an MPI parallel way; 3, accelerating the whole process in parallel through OpenMP; 4, transmitting data such as a Gaussian node array and a triangular surface element array into a GPU, accelerating a Gaussian integral value operation by the GPU to obtain a scattered field, and transmitting the scattered field into a CPU; and 5, transforming a scattered field time domain into a frequency domain through a Fourier transform, and dividing the frequency domain by an incident electric field frequency domain to obtain an RCS (Radar Cross Section) array. Through adoption of the time domain physical optics algorithm, time is saved greatly when a transient scattering calculation amount of an electrically large object is large.

Description

technical field [0001] The invention belongs to the field of electromagnetic field numerical analysis, relates to a Gaussian integral formula in mathematical numerical analysis, and specifically relates to a time-domain physical optics algorithm based on a mixed asynchronous parallel mode of CPU and GPU. Background technique [0002] The wide application of ultra-wideband radar and microwave and millimeter-wave radar has made the research on the wide-band time-domain characteristics of electrically large-sized targets attract extensive attention. Physical optics approximation is one of the efficient methods to analyze the frequency-domain electromagnetic properties of electrically large objects. However, only limited physical optics analyzes of transient or pulsed excitations in the time domain have been reported. In the early time-domain physical optics approximation, the frequency-domain response of the target excited by the time-harmonic source was obtained first, and th...

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Problems solved by technology

However, these parallel TDPOs are all implemented based on the CPU, and the platform is single. In order to achieve a high acceleration ratio, a high-performance workstation or even a PC cluster is often required, which occupies a large space and is expensive, and the cost of the simulation hardware is high. Due to the large number of CPUs, programming and debugging Difficulty increases, and there is an urgent need for a simple and efficient parallel programming method and platform to reduce the cost of software development and hardware simulation

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