| With the rapid development and application of many kinds of satellite from China. Because the demand of satellite with complex function, high precision and high stability is increasing. The projects of control system become more and more complex. The telemetering datas which need be transmitted and watched grow more and more. It has resulted in the increase of possibility of fault in satellite control system.It need a lot of energy for the designers and be very difficult to find out fault points by artificial monitor because of the complex and diverse styles of fault. The designers should make and verify decisions in short time after finding out fault points, but it is very difficult and pressed for time and causes delay or hindrance of salvage.So it is necessary for us to constructing a kind of Expert System,which has such functions as data processing, failure warning, fault diagnosis and simulation and decision support so as to ensure fault detection of satellites against incorrect and they can be repaired rapidly and correctly. The construction of this kind of Expert System is one of the most important factors for satellites to be normal operation.The expert system is able to improve own learning and performance, but it is based upon one more complex data warehouse whose data is mass, realtime, complex and diverse. The needs of the system is higher reliability, usability and security of the dates. Finally it should support high efficiency data access. In this case, we should design database schema elaborately and consider the schema translation from the different dates.It is necessary to carry out the database optimizing design which includes appropriate and professional index structure in order to support high efficiency data access. So we must use the advanced and optimum data mining technology as to improve the functions of fault detect, fault diagnosis and decision making. |
