本文選題：眾核系統(tǒng) + 單粒子效應(yīng)　； 參考：《上海交通大學(xué)》2014年碩士論文

【摘要】：隨著航天器控制系統(tǒng)復(fù)雜度的提高，眾核系統(tǒng)逐漸成為航天領(lǐng)域關(guān)注的技術(shù)方向之一。眾核系統(tǒng)性能優(yōu)越但對(duì)輻射的敏感度高。本文研究太空輻射條件下單粒子效應(yīng)導(dǎo)致的失效問題，提升眾核系統(tǒng)的可靠性。眾核系統(tǒng)中，總線擔(dān)當(dāng)著通信與鏈接的重任，論文首先研究了如何進(jìn)行總線參數(shù)的優(yōu)化取值，使總線獲得最高可靠性；論文然后研究了將眾核系統(tǒng)中的空閑處理器核分配給各子系統(tǒng)以提高整個(gè)系統(tǒng)可靠性的分配策略。 論文首先研究了眾核系統(tǒng)總線的可靠性問題，在分析總線位寬、時(shí)鐘頻率等參數(shù)與故障率之間關(guān)系的基礎(chǔ)上，建立用于評(píng)估總線可靠性的數(shù)學(xué)模型。結(jié)合對(duì)位寬、時(shí)鐘頻率和帶寬等參數(shù)的約束條件，給出了在不同的約束條件組合下，使總線達(dá)到最高可靠性的參數(shù)取值。 論文探討了眾核系統(tǒng)中冗余處理器核的優(yōu)化分配方案，該方案基于 可用度影響度優(yōu)先‖的資源分配策略，選擇對(duì)系統(tǒng)可用度影響最大的子系統(tǒng)優(yōu)先進(jìn)行分配。相比遍歷所有冗余資源分配方案尋找最優(yōu)解的方法，論文提出的分配策略運(yùn)算復(fù)雜度低，能夠?qū)崿F(xiàn)冗余資源的實(shí)時(shí)動(dòng)態(tài)調(diào)度，，提升眾核處理器在空間環(huán)境下的生存能力。該方案包括子系統(tǒng)對(duì)整個(gè)系統(tǒng)可用度影響程度的快速計(jì)算方法、基于馬爾可夫模型的系統(tǒng)總體可用度精確計(jì)算方法、對(duì)應(yīng)冗余處理器核分配方案的系統(tǒng)狀態(tài)轉(zhuǎn)移圖完整拓展方法。論文利用理論模型分析證明了系統(tǒng)可用度評(píng)估方法在準(zhǔn)確度上的改進(jìn)，最后利用仿真實(shí)驗(yàn)對(duì)所提的冗余處理器核分配方案的運(yùn)算實(shí)時(shí)性和可用度提升量進(jìn)行了驗(yàn)證。
[Abstract]:With the increasing complexity of spacecraft control system, multikernel system is becoming one of the technical directions in aerospace field. The multinuclear system is superior in performance but highly sensitive to radiation. In this paper, the failure problem caused by the order particle effect of space radiation conditions is studied to improve the reliability of the multinuclear system. In the multi-core system, bus plays an important role in communication and link. Firstly, this paper studies how to optimize the bus parameters to make the bus obtain the highest reliability. Then, the allocation strategy of allocating idle processor cores to each subsystem to improve the reliability of the system is studied. In this paper, the reliability of multi-core system bus is studied. Based on the analysis of the relationship between bus bit width, clock frequency and failure rate, a mathematical model is established to evaluate bus reliability. Combined with the constraints of the parameters such as bit width, clock frequency and bandwidth, the parameter values of maximum reliability of the bus are given under different constraint conditions. In this paper, the optimal allocation scheme of redundant processor cores in multi-core systems is discussed. Based on the resource allocation strategy based on the influence of availability, the sub-system that has the greatest impact on the availability of the system is selected for priority allocation. Compared with the method of traversing all redundant resource allocation schemes to find the optimal solution, the proposed allocation strategy has a low computational complexity and can achieve real-time dynamic scheduling of redundant resources and enhance the survivability of multi-core processors in spatial environment. The scheme includes a fast method for calculating the influence of subsystems on the system availability, and an accurate method for calculating the total availability of the system based on Markov model. A complete extension method of system state transition diagram corresponding to redundant processor core allocation scheme is presented. In this paper, the theoretical model analysis is used to prove the improvement of the accuracy of the system availability evaluation method. Finally, the simulation experiments are used to verify the real time operation and the availability enhancement of the proposed redundant processor core allocation scheme.
【學(xué)位授予單位】：上海交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：V446;TP332

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