本文選題：飛機(jī)發(fā)動機(jī) + 動靜態(tài)　； 參考：《合肥工業(yè)大學(xué)》2016年碩士論文

【摘要】：飛機(jī)發(fā)動機(jī)動靜態(tài)測試系統(tǒng)用于發(fā)動機(jī)試車和外場測試,在發(fā)動機(jī)故障檢測、參數(shù)調(diào)整分析和附件性能評價方面起到了關(guān)鍵作用。傳統(tǒng)臺式測試系統(tǒng)采用大量模擬電路,且動態(tài)測量與靜態(tài)測量分離,無法滿足機(jī)動性、檢測效率和穩(wěn)定性的要求。本課題在充分分析傳感器原理和PCB材料的基礎(chǔ)上,應(yīng)用現(xiàn)代檢測技術(shù)和動靜態(tài)測量共享技術(shù),研制了一套便攜式一體化飛機(jī)發(fā)動機(jī)動靜態(tài)測試系統(tǒng)。首先,根據(jù)測試系統(tǒng)下位機(jī)的技術(shù)要求,分析了發(fā)動機(jī)被測參數(shù)和激勵信號的特點(diǎn),并制定了總體設(shè)計方案。其次,結(jié)合半導(dǎo)體物理知識分析了熱電偶測溫及冷端補(bǔ)償原理,并根據(jù)傳感器特性設(shè)計了溫度檢測電路；提出了功率放大器構(gòu)成壓控恒流源的設(shè)計思想,并運(yùn)用OPA541設(shè)計了溫度激勵電路；根據(jù)發(fā)動機(jī)轉(zhuǎn)速傳感器輸出特性和GaAs光耦原理,采用單片機(jī)測周期法設(shè)計了轉(zhuǎn)速檢測電路。然后,分析了PCB材料對電路性能實現(xiàn)的影響,包括傳輸線和介電材料對特性阻抗的影響,以及銅箔厚度和基板材料對散熱性能的影響。最后,為減少標(biāo)度變換帶來的誤差,設(shè)計了利用軟件實現(xiàn)的分步標(biāo)度變換方法,同時實現(xiàn)了軟件調(diào)零和調(diào)滿的功能。實驗結(jié)果表明,本課題設(shè)計的硬件電路和軟件程序滿足了設(shè)計要求,提升了便攜性能,減少了人力消耗和發(fā)動機(jī)使用壽命損耗。板級熱設(shè)計有效改善了PCB的散熱能力,確保儀器在要求的溫度范圍內(nèi)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.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：V263.3

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本文編號：1831278