一、引言近几年，设备监测和故障诊断技术得到了飞速发展，广泛应用于航天航空工业、流程工业、冶金工业等诸多领域。目前，设备监测和故障诊断技术也引起了各国邮政界的广泛关注。最近几年开发的各种邮政设备都不同程度地引入了监测和故障诊断技术。法国邮政部门还开发了... I. INTRODUCTION In recent years, the technology of equipment monitoring and fault diagnosis has been rapidly developed and widely used in many fields such as aerospace and aviation, process industry and metallurgical industry. At present, the technology of equipment monitoring and fault diagnosis has also caused widespread concern in the postal service in various countries. Various postal equipment developed in recent years have introduced monitoring and fault diagnosis technologies to varying degrees. The French postal department has also developed ...