基于Altium Designer的航空发动机振动监测硬件系统的研究

发布时间：2018-05-27 08:03

本文选题：航空发动机 + Altium　；参考：《中国民航大学》2016年硕士论文

【摘要】：航空发动机的正常运转决定着飞机飞行的安全,为了监测航空发动机的运行状态,设计并研究一套针对双转子涡轮风扇发动机的振动信号监测系统。硬件系统设计与开发主要通过Altium Designer平台实现,系统电路的电路设计、印制电路板的设计均在此平台环境下设计完成。该监测系统包括输入、运算和输出三个模块。输入模块由振动通道、过程量通道、转速通道、数字输入和输出通道构成,各通道均采用内部多通道设计,用于对输入信号进行保护、放大、内部通道选择等信号调理功能。运算模块主要由模/数转换器用于将经过调理电路的模拟信号转换为数字信号,模拟信号分为两种,分别为经过低通滤波的直流信号和经过高通滤波的频率信号,两种不同的信号将分别输入至两个模/数转换器进行转换。输出模块用于将系统获取的信号进行数字化输出,包括控制电路输出端口,电源端口以及其相关电路连接。通过对设计电路的仿真和搭建了单转子实验平台,并对硬件系统的输入和运算模块进行功能实验,结果表明硬件系统可以对信号进行信号调理,实现了设计功能。所研究硬件系统可靠性高,各信号通道均采用多通道设计,使得在传感器损坏或电路损坏的情况下系统可正常运行。系统适用性强,系统信号调理电路可以与大部分传感器对接使用。硬件系统采用集成化设计,将信号输入与运算模块集成在一张印制电路板上。本文介绍了各通道处理电路的设计和仿真过程、A/D转换器的选择方式和连接原理、印制电路板的设计过程以及对系统的实验和数据获得,最后得出结论。
[Abstract]:The normal operation of the aeroengine determines the flight safety of the aircraft. In order to monitor the running state of the aeroengine, a vibration signal monitoring system for the twin-rotor turbofan engine is designed and studied. The design and development of hardware system is mainly realized by Altium Designer platform. The circuit design of the system circuit and the design of the printed circuit board are all completed in this platform. The monitoring system includes three modules: input, operation and output. The input module is composed of vibration channel, process channel, rotational speed channel, digital input channel and output channel. Each channel is designed with internal multi-channel, which is used to protect input signal, amplify, select internal channel and so on. The operation module is mainly used by A / D converter to convert analog signal from conditioning circuit to digital signal. The analog signal is divided into two kinds, namely, the low-pass filtered DC signal and the high-pass filtered frequency signal. Two different signals will be input to two A / D converters for conversion. The output module is used to digitally output the signal acquired by the system, including the output port of the control circuit, the power port and the related circuit connection. Through the simulation of the design circuit and the establishment of a single rotor experimental platform, the functional experiments of the input and operation modules of the hardware system are carried out. The results show that the hardware system can adjust the signal and realize the design function. The reliability of the hardware system studied is high, and the multi-channel design is adopted in each signal channel, which makes the system work normally when the sensor is damaged or the circuit is damaged. The system has strong applicability, and the system signal conditioning circuit can be used to connect with most sensors. The hardware system adopts integrated design and integrates signal input and operation module on a printed circuit board. This paper introduces the design and simulation of each channel processing circuit. The selection and connection principle of the A / D converter, the design process of the printed circuit board, the experiment of the system and the data acquisition are introduced. Finally, the conclusion is drawn.
【学位授予单位】：中国民航大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：V263.6

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