The Mathematical Model And Simulation Of Navigation Radar Precipitation Particles

With the growing of the international transport, sea lanes has become a lifeline to the survival and development of each country, in today's maritime transport enterprise vigorous development, how to ensure the safety of ship can efficient sailing on the sea, has become a subject navigation staff pay close attention to. Although now a lot of modern ships are installed on all kinds of good communication navigation equipment to auxiliary navigation of ships, but each year there are still a lot of ship navigation safety accident, caused incalculable economic losses and tens of thousands of casualties. The study found that in bad weather conditions, accidents of ship sailing is far higher than the normal incidence of navigation of the ship. With the progress of computer and a series of related technology, navigation radar simulator is characterized by low cost, short test period, low risk, etc by radar researchers used for navigation of ships, to simulate the of all kinds of situation can reduce shipping drivers in bad weather conditions of the radar echo errors of navigation of ships, as a result of accident.This article embarks from the rain and snow particle real radar echo, and combined with type A radar display of radar receiver received radar echo images, with the strength of the radar echo signal analysis and the distribution of the particles. In the aspect of establishing mathematical model, and through the probability density function of normal distribution and rayleigh distribution probability density function, the weibull distribution probability density function of the analysis and simulation of the real radar echoes, established the use of the three kinds of probability density distribution function to simulate the feasibility of rain and snow particle distribution, and use the particle system theory of rain and snow particle model is established. Radar simulator implementation, mainly divided into two parts, one for the radar of the file system establishment and Settings, secondly, radar simulator shows that implementation. In the related documents of radar system, the establishment of the chapters are introduced in detail in this paper, the simulated rain and snow particle step by step is how to generate particles and coordinates space coordinates, particle properties and to deal with these data generated. In the latter part of this article, mainly tells the story of the navigation display part of the radar simulator, how the individual characteristics of rain and snow particle distribution in reality in the navigation radar simulator displayed in the display screen, because of the rain and snow particle number, each particle has a separate coordinates and attributes, to support navigation computer system has brought a certain burden of radar simulator, in order to reduce the burden of the navigation radar simulator to computer system, this article from the particle data calculation, the particle macro coordinate transformation and radar simulator particles on the screen of the display shows three aspects has carried on the optimization. Finally, this paper also simulate the radar scan lines, light shows these two kinds of commonly used model of the radar display.Through the rain and snow particle of the radar echo waveform analysis, to the establishment of mathematical model, and finally realize the rain and snow particle image display, from the simulation of radar and the effect of the image, achieve the expected to get with real rain and snow particle simulation radar image of radar image is relatively similar.