【作者】 秦香敏；

【导师】 潘宏侠； 郑海起；

【作者基本信息】 中北大学 ， 信号与信息处理， 2007， 硕士

【摘要】 航天发射场地面设施设备是执行科研试验任务的重要物质基础,其质量的好坏直接影响科研试验任务的成败。因此开展对航天发射塔回转平台状态质量检测技术的研究具有重要的现实意义和理论意义。往复式低速重载旋转不完全大轴承是实现回转平台功能的一个关键部件,此类轴承由于其特殊的运行特点,传统轴承的故障诊断方法无法直接利用。对这种轴承的性能检测和故障诊断研究,是一个全新的领域。因此,本学位论文研究了滚动轴承的故障起因及故障类型,分析了各种故障的振动特点,总结了往复式低速重载旋转不完全大轴承的振动检测原理,为状态质量检测提供了理论依据,并据此设计了检测系统。在试验基础上,分析了回转平台在打开与合拢时的振动信号,首次提出了从脉冲能量法角度对往复式低速重载旋转不完全大轴承的状态质量进行检测,构造了加权平均的脉冲总能量和脉冲冲击次数特征参量,由此推导了回转平台的状态质量检测方法,并建立了基于BP神经网络的状态质量模式识别系统。通过本文的研究,实现了航天发射塔回转平台状态质量的有效检测,为航天发射任务的圆满完成提供了前提和保障,有一定的应用前景和较高的实用价值。更多还原

【Abstract】 The spaceflight launch site equipment is the matter foundation for experiment, which is directly related to the success or failure of it. This paper contributes effective theory and methods for the spaceflight launch site equipment.The key part of the rotary flat is the rolling bearing of reciprocating,low speed, non-full rotation and heavy load. Because of the rolling bearing’s special work characteristic, traditional fault diagnosis don’t directly use. It is fully new study area for the fault diagnosis of the rolling bearing. The paper firstly study the cause and type of fault in rolling bearing, analyze the vibration feature of all kinds of faults and summarize the vibration detection theory of this type bearing. They are the principle basis of state quality test. Test system is designed. Based on the experiment, it firstly put forward pulse energy for the state quality test for the rolling bearing of reciprocating,low speed, non-full rotation and heavy load by analyzing on-off vibration signals. The parameter of pulse energy and pulse times are constructed, which is used to solve the state quality test for rotary flat .Set up the state quality pattern recognition system based on BP neural network.The performance test and evaluation on state quality of rotary flat are primarily realized. The method has certain application foreground and high practicality value.更多还原