外文翻译航空发动机状态监测系统设计研究.docx

1、外文翻译航空发动机状态监测系统设计研究外文翻译-航空发动机状态监测系统设计研究沈阳航空航天大学毕业设计外文翻译学 院自动化学院专 业运载器这测试技术班 级94070301学 号2009040510011姓 名李万峰指导教师崔建国负责教师崔建国沈阳航空航天大学2013年6月Aeroengine condition monitoring system design studyDesign research abstract: the aircraft engine condition monitoring system for a certain type of aircraft engine a

2、s the research object, discussed the engine state monitoring system design and implementation, this paper mainly discusses the status monitoring system of the overall design, system software and hardware development and testing and redundancy design, and in the design of engine state monitoring syst

3、em, introduced the embedded PC / 104 modules.In order to make the state monitoring system has a better scalability and adaptability, the system designed can work in three ways: airborne operation mode, data playback mode and ground test run mode, through these way for automatic monitoring of engine

4、state parameter, for the state of the engine trend analysis, fault diagnosis, and as to provide scientific basis for maintenance.Key words: the engine condition monitoring;PC / 104;Redundant design.1.The introduction As the power source of the airplane flight, aircraft engine research is a very comp

5、lex process, the aircraft engine test as the development of the three pillars (calculation, manufacture and test), one of its importance is self-evident, it turns out, mainly consisted of engine test, rather than by calculation and analysis.For the development of an aircraft engine group, is flat, h

6、ow we can decide the how developed horizontal engine.For aircraft engine manufacture, condition monitoring is an important examination method of engine performance, by condition monitoring and testing work is to adjust the engine performance and break-in, check the manufacturing or overhaul quality,

7、 finally gives the engine factory performance report purpose, therefore the accurate and reliable test method for state monitoring to ensure the quality of the engine has the vital significance.As we all know, the engine vibration and high noise in the process of work and the strong jamming signal,

8、all parameters to the variety of the monitoring system puts forward higher requirements.Especially with the improvement of engine performance, real-time monitoring of the parameters needed for condition monitoring is becoming more and more people continue to explore new testing technology for many y

9、ears, to adapt to the increasingly development of engine test technology requirements.1. The condition monitoring system overall design The condition monitoring system is designed for a certain type of turbofan engine, the engine monitoring system of the input signal is part of a total of 17 analog,

10、 3 road 16 way switch frequency and quantity, including 17 analog, 3 road frequency quantity through the signal conditioning circuit into a standard signal conditioning, to lower place machine;Under 16 way switch quantity after adopting the light into a machine.In the data processing part of the nee

11、d for continuous monitoring of state parameters of the engine, so in the need for signal processing, storage and transmission, the upper machine at the same time, according to the need to receive the signal in real time and if samples values more than its upper and lower give alarm, including buzzer

12、 lower place machine and superordination machine screen alarm; PC the data display mode including curve display, digital display, simulation table display and record the browsing;The data communication between upper machine and lower machine way using serial communication.In order to improve the ext

13、ensibility and adaptability of engine state monitoring system, the system designed can work in three ways: airborne operation mode, data playback mode and ground test mode, including airborne operation mode can be PC / 104 modules separately in the form of the airborne launch during the real flight

14、test, because of the PC / 104 modules, small volume, high reliability, high temperature resistance and resistance to adverse conditions, well adapted to the flight environment, to the parts of the flight state and parameters in the flight details and accurate acquisition, data processing and at the

15、same time, all the data are stored in the solid plate, in order to perform data playback and analysis of engine performance in the future;Data playback mode can be kept in a flight test data sent to the PC via a serial port communication, PC receives the data real-time display, including using digit

16、al watch display the data in the form of clear, at the same time also to simulate image, in the form of table of data, and in addition you can also choose to use display mode with the curve will be testing the state parameter of dynamic display, and finally to the received data stored in hard disk;G

17、round test methods organic combination of the airborne playback mode, operation mode and data will be collected in the process of engine test parameters are processed, then real-time transmitting them via a serial port to the PC 4, PC can display the data in real time again at the same time to save

18、them.In order to improve the reliability of the system, make the system self-check function and redundant Yu Jiegou, according to the system fault conditions to change the modulation circuit or downtime.According to the requirements of aircraft engine test of 20 analog quantity and frequency, and qu

19、antity of 16 way switch sampling frequency is set to 20 ms, analog signal processing precision for 12, and all recuperated into 0 5 V. Synthetically considering the factors, the systems upper machine and lower machine USES the microcomputer, and selects the maturity of the A/D conversion board and d

20、igital I/O board to collect signals, and designed the signal disposal circuit of signal isolation, filtering and amplification processing, transformation into A standard signal.Software used to develop ways to meet the system requirements.According to the working environment temperature, humidity, v

21、ibration resistance and anti-interference requirements, choose the PC / 104 bus, and lower place machine and peripheral boards have to choose the PC / 104 module, in order to meet the aircraft airborne equipment requirement for the weight, volume, etc.2condition monitoring system hardware design Bas

22、ed on the system overall design, the whole monitoring system hardware is shown in figure 1 USES hardware structure classifiers, by A P4 PC and A PC / 104 into A unit, under the lower machine and PC / 104 motherboard, peripheral interface card, and all kinds of circuit, and various peripheral interfa

23、ce card circuit including: 3 PC / 104 A/D conversion board, 2 pieces of PC / 104 digital I/O board, light 1 PC / 104 multi-function acquisition board, terminal board, signal disposal circuit switching circuit and field/testing.PC / 104 motherboards, PC / 104 A/D conversion board and PC / 104 digital

24、 light every I/O board implementation of engine simulation signal measure and frequency A/D conversion and collection, as well as to the amount of engine digital signal isolation, and signal data processing of collection, storage and transmission.PC / 104 multi-function acquisition boards and self-i

25、nspection/scene switching circuit is used to implement the system self-checking and site data acquisition of switching, and sending self-checking voltage.Signal conditioning circuit to isolation, filtering, amplifying the signal, they transform into standard signal, and then into a machine.PC are us

26、ed to implement the data acquisition machine by sending data receiving, storage, display and alarm.3.condition monitoring system software design Of the condition monitoring system software modules goal is to develop a set of applicable to the aircraft engine condition monitoring platform system, it

27、can real-time high pressure in the engine working process speed, throttle Angle, displacement, oil injection nozzle location, the fuel flow rate, vibration of X, Y, atmospheric temperature, T, 5, 7 T temperature, oil temperature, oil temperature, hydraulic temperature, car frame under static pressur

28、e, the static pressure, high pressure, fuel oil pressure, oil pressure and hydraulic oil pressure, etc. 17 analog and 3 road, frequency, and 16 way switch for data acquisition, processing, storage, operation, such as communication, status display and alarm software running on the upper machine and l

29、ower machine respectively, system specific features include:3. 1 state parameter real-time collection and processing In the system, complete engine various real-time acquisition of state parameter, and the associated with the state parameter of processing and calculation, and the deviations from the

30、 normal range of state parameters on the tag, to analyze the engine working condition.3. 2 real-time status parameters and playback data transmission On the surface of the test mode and online data playback mode, a machine under the PC / 104 collected status parameters via a serial port in real-time

31、 transmission to the PC, and save to the database on a PC.3.3 status monitoring and real-time data controls and related to use of drawing tools to simulate the acquisition state parameters of the digital display and the table shows, and draw the time curve so that the observation parameter of the pa

32、rameters of the dynamic change and trend of the future, which can monitor the working state of the engine at different times, to achieve the purpose of condition monitoring.3. 4 alarm output and print When the collection to the state of the parameter values deviate from normal range after, through the voice warning color to operating personnel, location, and display alarming information, and all the warning point data can be extracted for display, analysis and printing.4 self-checking system and redundancy design 4.1 self-checking system signal disposal system is an important part of gener