A Reliability Evaluation Model Of Civil Aviation Information System Based On The Test Data

With the continuous expansion of civil aviation passenger service information system reliability scale the amount of data to be processed, civil aviation passenger flight query system, departure systems and reservation systems and other information systems increasingly large. Has reached the degree of mass data, presents a challenge to reliability evaluation of civil aviation passenger service information system in China. Civil aviation passenger service information system is different from other information systems, the need for data exchange, storage, real-time management of each subsystem, relatively independent and coordinated operation. Requirements 7*24 hours of uninterrupted reliable system operation, the system needs to have security, reliability, efficiency and real-time characteristics. To evaluate the reliability of civil aviation passenger service information system application before the system through the test data and provide a guarantee for the reliability of on-line system. How to use these test data and accurate assessment of civil aviation passenger service information system reliability, and services to airlines, air traffic control, airport system construction and maintenance, for the civil aviation industry, there is an urgent demand.In order to meet the requirements of civil aviation passenger service information system reliability, combined with the related theory of software reliability model, were cited in the Jelinski-Moranda(J-M) model and Goel-Okumoto(G-O) model of civil aviation passenger service information system for reliability evaluation. For the shortcomings and deficiencies J-M model and the G-O model, we propose a new model, namely Schneidewind change point model. The introduction of Schneidewind in reliability assessment of civil aviation passenger service information system change point model, and carried out the experimental validation. The experimental results show that the Schneidewind change point model can be able to achieve a better assessment of results.In order to evaluate the reliability of the automation system, we developed a reliability evaluation prototype system based on test data. The reliability evaluation prototype system consists of four modules, namely the database management module, failure data trend analysis module, the model evaluation module and the model quality assessment module. The reliability evaluation prototype system can input the civil aviation passenger service information system of each subsystem failure data, the data is automatically converted into failure count data and failure time interval data; the failure data for trend analysis, and graphical method and Laplace law given failure data trend curve; Compare choose from a variety of software reliability model to evaluate the reliability of the system, and give a model to evaluate the parameters of the calculation and Prequential Likelihood Ratio(PLR) plot and U structure diagram and Y structure graph drawing.