便携式一体化飞机发动机动静态测试系统开发—下位机

发布时间：2018-05-01 22:28

本文选题：飞机发动机 + 动静态　；参考：《合肥工业大学》2016年硕士论文

【摘要】：飞机发动机动静态测试系统用于发动机试车和外场测试,在发动机故障检测、参数调整分析和附件性能评价方面起到了关键作用。传统台式测试系统采用大量模拟电路,且动态测量与静态测量分离,无法满足机动性、检测效率和稳定性的要求。本课题在充分分析传感器原理和PCB材料的基础上,应用现代检测技术和动静态测量共享技术,研制了一套便携式一体化飞机发动机动静态测试系统。首先,根据测试系统下位机的技术要求,分析了发动机被测参数和激励信号的特点,并制定了总体设计方案。其次,结合半导体物理知识分析了热电偶测温及冷端补偿原理,并根据传感器特性设计了温度检测电路；提出了功率放大器构成压控恒流源的设计思想,并运用OPA541设计了温度激励电路；根据发动机转速传感器输出特性和GaAs光耦原理,采用单片机测周期法设计了转速检测电路。然后,分析了PCB材料对电路性能实现的影响,包括传输线和介电材料对特性阻抗的影响,以及铜箔厚度和基板材料对散热性能的影响。最后,为减少标度变换带来的误差,设计了利用软件实现的分步标度变换方法,同时实现了软件调零和调满的功能。实验结果表明,本课题设计的硬件电路和软件程序满足了设计要求,提升了便携性能,减少了人力消耗和发动机使用寿命损耗。板级热设计有效改善了PCB的散热能力,确保仪器在要求的温度范围内安全可靠地工作。
[Abstract]:The aircraft engine dynamic and static test system is used in engine test and field test, which plays a key role in engine fault detection, parameter adjustment analysis and accessory performance evaluation. The traditional desktop test system uses a large number of analog circuits, and the dynamic measurement is separated from the static measurement, which can not meet the requirements of mobility, detection efficiency and stability. Based on the analysis of sensor principle and PCB material, a portable integrated aircraft engine dynamic and static test system is developed by using modern detection technology and dynamic and static measurement sharing technology. Firstly, according to the technical requirements of the lower computer of the test system, the characteristics of the engine parameters and the excitation signal are analyzed, and the overall design scheme is worked out. Secondly, based on the knowledge of semiconductor physics, the principle of thermocouple temperature measurement and cold end compensation is analyzed, and the temperature detection circuit is designed according to the characteristics of the sensor. According to the output characteristics of engine speed sensor and the principle of GaAs optical coupling, the speed measuring circuit is designed by using the method of measuring period of single chip computer. Then, the influence of PCB material on the performance of the circuit is analyzed, including the influence of transmission line and dielectric material on the characteristic impedance, and the influence of copper foil thickness and substrate material on the heat dissipation performance. Finally, in order to reduce the error caused by scale transformation, a step scale transformation method is designed by using software, and the function of zero adjustment and full adjustment of software is realized at the same time. The experimental results show that the hardware circuit and software program can meet the design requirements, improve the portability, reduce the human consumption and engine life loss. The board thermal design improves the heat dissipation ability of PCB effectively, and ensures the instrument to work safely and reliably in the required temperature range.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：V263.3

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