本文選題：飛行控制計算機　切入點：中央處理單元　出處：《南京航空航天大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：飛行控制計算機是無人機飛行控制系統(tǒng)最關(guān)鍵的部件,承載飛行管理、飛行控制律解算、任務(wù)設(shè)備管理、系統(tǒng)異常檢測和故障處理等復(fù)雜任務(wù)。隨著無人機飛行任務(wù)復(fù)雜程度增加,飛行控制計算機的功能和性能陷入瓶頸狀態(tài),突出體現(xiàn)在信息處理能力裕量降低,數(shù)字傳感器接口資源緊缺,內(nèi)部總線負載過重,總線通信效率和可靠性受限。為突破上述制約因素,本文開展了基于FlexRay總線飛行控制計算機核心單元的設(shè)計和FlexRay總線技術(shù)研究。首先,介紹了國內(nèi)外分布式余度飛行控制計算機、Flex Ray總線技術(shù)的研究現(xiàn)狀以及樣例分布式飛行控制計算機的結(jié)構(gòu)特點,針對處理器性能和串行接口資源不足的問題,給出了中央處理單元和串行通信接口單元的總體設(shè)計方案;同時,分析了采用FlexRay總線技術(shù)替換CAN總線的可行性、Flex Ray總線的基本通信機制和實現(xiàn)方案,以解決飛行控制計算機內(nèi)部總線信息傳輸能力問題。其次,采用模塊化設(shè)計思想,完成了以MPC8280為核心的中央處理單元、以FPGA為核心的串行通信接口單元軟硬件的詳細設(shè)計與開發(fā),提高了核心單元的處理性能和通信能力,滿足高性能無人機飛行控制的需求。再次,分析研究了樣例分布式飛行控制計算機內(nèi)部總線數(shù)據(jù)流以及通信需求,制定了飛行控制計算機內(nèi)部FlexRay總線的通信協(xié)議和余度管理策略,提高了總線通信準確性與可靠性,降低了總線負載。最后,為驗證核心單元和FlexRay總線的功能和性能,設(shè)計和開發(fā)了基本性能測試和系統(tǒng)集成測試的環(huán)境與方案,試驗結(jié)果驗證了中央處理單元、串行通信接口單元和FlexRay總線通信與管理的關(guān)鍵性能和功能滿足設(shè)計要求。
[Abstract]:Flight control computer is the most important component of UAV flight control system. With the increasing complexity of UAV mission, the function and performance of flight control computer are in a bottleneck state, which is reflected in the decrease of information processing capacity margin. The digital sensor interface resources are scarce, the internal bus is overloaded, the bus communication efficiency and reliability are limited. In this paper, the design of flight control computer core unit based on FlexRay bus and the research of FlexRay bus technology are carried out. This paper introduces the research status of Flex Ray bus technology of distributed redundant flight control computer at home and abroad, and the structural characteristics of the sample distributed flight control computer, aiming at the shortage of processor performance and serial interface resources. The overall design scheme of central processing unit and serial communication interface unit is given, and the feasibility of replacing CAN bus with FlexRay bus technology is analyzed, and the basic communication mechanism and implementation scheme of Flex Ray bus are analyzed. In order to solve the problem of internal bus information transmission ability of flight control computer. Secondly, the central processing unit with MPC8280 as the core is completed with the modular design idea. The detailed design and development of the serial communication interface unit based on FPGA improves the processing performance and communication ability of the core unit, and meets the requirements of flight control of high performance UAV. The internal bus data flow and communication requirements of a distributed flight control computer are analyzed and studied. The communication protocol and redundancy management strategy of the FlexRay bus in the flight control computer are formulated, which improves the accuracy and reliability of the bus communication. Finally, in order to verify the function and performance of the core unit and FlexRay bus, the environment and scheme of basic performance test and system integration test are designed and developed. The test results verify the central processing unit. The key performance and function of serial communication interface unit and FlexRay bus communication and management meet the design requirements.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：V247.12

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