The Research On Assistant Sailboat Training System Based On Expert System And Mapx

This paper gives a whole introduction to the theory and principle of expert system, mainly discussing several knowledge representation methods such as productions, semantic network, frame, predicate logic and object-oriented representations. Three main reasoning-control strategies such as forward reasoning, backward reasoning as well as forward and backward mixed reasoning are also discussed, including their related infering algorithms. Some technologies such as GIS, GPS as well as wireless data communication are also researched into. Different from the traditional expert development, it introduces a new method of developing an expert system, which utilizes visual basic and amzi prolog in programming. This method can save a lot of time in the process of developing an expert system compared with the traditional methods. From the aspect of engineering realization, a sailboat training system is realized, which utilizes several technologies such as GPS, GIS, wireless data communication, serial communication as well as expert system.The assistant sailboat training system has realized many functions such as sailboat real time monitoring, dynamic and real time display of sailing sailboat on the electronic map with a heavy red point, redisplay of the training process of a training sailboat, automate collection of the game area environment parameters, real time remote collection of dynamic data of a sailboat and real time display the state (including the velocity, direction, longitude and latitude) of a sailing sailboat. With the sailboat coaches'rich experience stored in the knowledge database, the expert system can give some advices to the sailor according to different situations. The advices involve several aspects such as the assembly of relevant equipments of a sailboat, start training, straightway sailing race training, direction changed training, sailing around marks training and strategy training etc. It can improve the scientific training of sailboat program while greatly deducing the labor of sailboat coaches at the same time.