Research On Fault Diagnosis And Tolerant Technology And Its Application To Integrated Navigation System

Fault diagnosis and fault tolerant control are application edge science. Its theory foundation refers to modern control theory, computer engineering, data statistics, signal processing, pattern recognize, artificial intelligence and relevant science. Its appearance, rise and rapid development are the alternate effect of requirement practicality and development much science theory. With the improvement of modern automatic technology, the complexity of every project is enhanced largely. The reliability and security have been regarded highly by all circle. So it is important to ensure modern complex system through studying fault diagnosis and fault tolerant control.Now structure and task of warship navigation system become more and more complex because of the development of electronic war and navigation technology. The demand of control precision and stabilization become more and more high. Fault detection and diagnosis and fault tolerant control inaugurate a new way to improve the reliability maintenance and validity of navigation system and become a study keystone in navigation domain. Fault diagnosis and fault tolerant control of navigation system have been lucubrated taking into account of reliability.Contents and method of fault detection, design method of Fault Tolerant are introduced by the numbers; In allusion to Integrated Navigation System, several intestine or overseas typical integrated navigation systems with fault detection and fault tolerant are analyzed.Fault detection of the integrated navigation system usually designed with method based on Kalman filter. Its detection-performance mostly rests with residuary sensitivity relative to the faults. In this dissertation, the method of the detection x1 was studied. A fault detection strategy based on dual-states detection/2 was put forward and validated its validity by computer emulation at last. At the same time, we studied the method of faults detection, diagnosis and isolation when outliers are in existence. And method is put forward to weed outoutliers.Studied wavelet transform, put forward a multi-sensor fault detection algorithm of integrated navigation system based on FM Gauss wavelet transformafter analyzing the characteristic of the FM Gauss wavelet transform. The algorithm diagnoses the state of sensors by using the observed value directly and detected effectively online aiming at soft faults such as variance, break etc.Fault detection is foundation and premises of the fault tolerant control, through analysis and study to the actuality of integrated navigation system, this paper advanced collectivity project and design about fault tolerant of integrated navigation system. It mainly includes: system information based on network, implement design of information redundancy mainly in network communication assisted by serial communication, adopt 1553B bus network in navigation system, and Ethernet when communication in all systems. In LAN, 1553B bus network adopts double BC which are designed as principal and subordinate, and Ethernet adopts fault tolerant structure with double network and double redundancy, prompts the system reliability; The system adopts realization of massive module and redundant method of double port RAM, and made a design in dual-unit communication and output interface, afforded realize scheme of double ports RAM and dual-unit arbitrate module, through the task which analyzed software fault tolerant and process of design, divided navigation system into four modules, submit functional arrangement structure of software about system's arrangement and module, and designed distributing method of system's task modules; classified integrated navigation system's modules, analyzed mechanism which failures result from, brought forward main store fault detection based on characteristic matrix, fault detection and redundancy of 1553B data bus network, fault detection and redundancy of Ethernet, idiographic realize method of fault detection of serial port.This paper was engaged on study of fault detection and fault tolerant o...