直升机自动倾斜器轴承振动采集系统

发布时间：2018-01-16 09:51

本文关键词：直升机自动倾斜器轴承振动采集系统　出处：《南昌航空大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着航空航天技术的飞速发展,军队现代化建设的需要,提高武器装备质量特别是直升机的质量势在必行。自动倾斜器是直升机的重要组成部分。为了保证直升机的飞行安全性,降低直升机的飞行事故,对直升机自动倾斜器轴承振动进行数据采集和处理有着十分重要的意义。对直升机进行故障诊断、健康预测是保证直升机安全、稳定运行的重要组成部分。直升机自动倾斜器轴承故障分析仪采用当前比较流行的虚拟仪器思想,主要由振动信号采集模块和PC/104工控机组成。由于该直升机自动倾斜器轴承故障分析仪的实时性要求比较高,因此上下位机之间通过PCI通信方式实现数据传输。PC/104工控机主要是实现对轴承振动采集系统的采样参数设置、采样启动脉冲选择、采样触发方式选择、FFT所加的窗函数选择以及校准,另外也控制显示屏显示采集到的振动信号的特征参数、波形等。振动信号采集模块由本设计完成,通过采用32位浮点型DSP芯片TMS320F28335,16位高精度ADS8568实现了八通道两种采样率的采样,首先用FFT和能量重心校正法对采集数据进行处理,然后由PC/104对其再作进一步的研究,因此该分析仪不仅能够对直升机自动倾斜器轴承故障进行诊断、预测,还能够对其他传动信号、旋翼信号进行故障诊断、健康预测。本文从理论分析、方案论证、软硬件设计等几个方面详细阐述了该直升机自动倾斜器轴承振动采集系统的设计过程。首先介绍了该课题研究的背景意义及国内外研究现状。其次详细阐述了该轴承振动采集系统采样方法、频谱校正算法的选取及实现过程。接着在仔细研究用户提出的直升机自动倾斜器轴承振动采集系统的要求和技术指标,并进行一定调研基础上,给出整体软硬件实现方案,采用模块化思想对其进行分模块介绍。最后介绍了软硬件调试的情况、测量数据的误差分析等。通过实验表明,该轴承故障分析仪具有以下优点:体积小、重量轻、操作简单、携带方便。
[Abstract]:With the rapid development of aerospace technology, the military modernization needs. It is imperative to improve the quality of weapon and equipment, especially the quality of helicopter. Automatic tilter is an important part of helicopter. In order to ensure helicopter flight safety and reduce helicopter flight accidents. It is very important to collect and process the data of bearing vibration of helicopter automatic tilter. For helicopter fault diagnosis, health prediction is to ensure helicopter safety. The helicopter automatic tilter bearing fault analyzer adopts the popular idea of virtual instrument at present. It is mainly composed of vibration signal acquisition module and PC/104 industrial control computer. Because of the high real-time requirement of the helicopter automatic tilter bearing fault analyzer. Therefore, the data transmission between upper and lower computers is realized by PCI communication. PC / 104 industrial computer mainly realizes the sampling parameter setting and sampling start pulse selection of bearing vibration acquisition system. Sampling trigger mode to select and calibrate the window function added by FFT, and also control the display screen to display the characteristic parameters of the collected vibration signal, waveform and so on. The vibration signal acquisition module is completed by this design. By using 32-bit floating-point DSP chip TMS320F28335- 16-bit high precision ADS8568, two sampling rates of eight channels are realized. Firstly, the collected data are processed by FFT and energy barycenter correction method, and then further studied by PC/104. Therefore, the analyzer can not only diagnose and predict the bearing fault of helicopter automatic tiller, but also diagnose the other transmission signals and rotor signals, and predict the health. Scheme demonstration. The design process of the helicopter automatic tilter bearing vibration acquisition system is described in detail from several aspects such as hardware and software design. Firstly, the background significance of the research and the status quo of the research at home and abroad are introduced in detail. Secondly, the design process of the helicopter automatic tilter bearing vibration acquisition system is described in detail. The sampling method of bearing vibration acquisition system. The selection and implementation process of spectrum correction algorithm. Secondly, the requirements and technical specifications of the helicopter automatic tiller bearing vibration acquisition system proposed by the user are carefully studied, and a certain amount of research is carried out. The whole hardware and software implementation scheme is given, and the modular idea is used to introduce the module. Finally, the debugging of the hardware and software, the error analysis of the measurement data and so on are introduced. The bearing fault analyzer has the following advantages: small volume, light weight, simple operation and easy to carry.
【学位授予单位】：南昌航空大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：V275.1

【参考文献】