The Study On Radar Simulator Assessment System Realized By Computer

Navigation simulator is a kind of emulational system integrated with many subjects such as navigation techniques, computer application system, computer graphics and modern cybernetics. It has played an important role in the maritime education and training. Radar simulator is typical among the navigation simulators and applied very popularly. However, in the process of assessment the judgment of the simulator coaches is subjective to some extent due to the lack of standards. Based on that, the paper puts forward the radar simulator assessment system (RDSAS) and designs the relevant software. The system can be used in the quantitative assessment according to the operation of students and the veracity of the operation, and also make the assessment objective and reliable considering the subjective estimation of the simulator coaches.RDSAS can ensure that the criteria are specific and effective when assessing the qualification and ability of students, which reduces the subjectivity to the lowest point. The system can fully reflect the actual level of students and bring forward referenced suggestions to the Maritime Safety Administration. RDSAS must be realized by computer. The assessment software can statistically analyze the original data and deal with the routine work. On the other hand, the mathematic models of radar plotting is viewed as one of ingredients of the vessel intelligent preventing-collision system, and the "non-paper plotting" will come true on the basis of the models.First of all, the dissertation reasons out the general mathematic models of radar plotting by means of the plane analytic geometry, and establishes the assessment factors of the system. Secondly, it establishes the statistical mathematic models of the error of each assessment factors by means of non-parameter hypothesis test, and further divides the distributing sections of the error. Finally, on the platform of C++ Builder, the thesis designs the assessment software of radar simulator that is applied effectively according to the training ofradar/ARPA simulator in the Navigation College of WTU.The chapter 1 of the dissertation analyzes the limitation of training and assessment of radar/ARPA simulator, and fixes on two research items, that is to establish the RDSAS and design the relevant software according to the STCW78/95 international convention on basis of existing researches. In the chapter 2, the idea of modularized system design is advanced. The RDSAS is composed of three modules namely the calculating module, the assessing module and the database management module. In addition, it discusses the methods of realizing the RDSAS. In the chapter 3, it mainly deduces the mathematic models of six factors of the target ship and the problems of "given point" and "well-timed point" in the plane orthogonal reference frame. Also it can calculate the standard results of each assessment factor by means of these mathematic models. In the chapter 4, it primarily stats large numbers of original data and obtains the probability distributing functions of each assessment factor by means of Pearson x2 Goodness of Fit Test. And then it establishes the distributing sections of the error of each assessment factor. Meanwhile it expatiates the criteria of simulator coach's subjective judgments. In the chapter 5, it puts forward the database application system of radar simulator and designs the module structure of the system. It further relates the functions of the database management module of radar simulator, and it discusses the database designing of the system. In the chapter 6, it develops the database application software of radar simulator based on Borland Database Engine (BDE) by means of Borland C++ Builder 5.5. It introduces the main functions of the software that is effective after being tested and analyzed in the chapter 6.