Adopt network wiring with adequate redundancy structure using optical fiber as the trunk , clear network structure and high manageability 采用以光纖為主干的有充足冗余的結(jié)構(gòu)化網(wǎng)絡(luò)布線,網(wǎng)絡(luò)結(jié)構(gòu)清晰,可管理性強。
Adopt network wiring with adequate redundancy structure , using optical fiber as the trunk , clear network structure and high manageability 采用以光纖為主干的有充足冗余的結(jié)構(gòu)化網(wǎng)絡(luò)布線,網(wǎng)絡(luò)結(jié)構(gòu)清晰,可管理性強。
This system adopts dynamic redundancy structure , using software to switch hardware redundancy system waiting and in function 該系統(tǒng)采用動態(tài)冗余結(jié)構(gòu),通過軟件方法實現(xiàn)硬件冗余系統(tǒng)待命狀態(tài)與投入運行狀態(tài)的自動切換。
The design of 270 voltages high - pressure dc drive is settled utilizing bridge inversion circuit in this thesis . the miniaturized and low consumed design of hardware circuit and the design of dual - redundancy structure of system are also realized adopting tms320lf2407a dsp chip as main control cell 論文應(yīng)用全橋式逆變電路解決了系統(tǒng)270v高壓直流驅(qū)動設(shè)計,采用tms320lf2407adsp芯片為主控單元,實現(xiàn)了系統(tǒng)硬件電路小型化、低功耗設(shè)計及系統(tǒng)雙余度結(jié)構(gòu)設(shè)計。
To solve this problem , this paper presents a novel dual modular redundancy structure using complementary logic - alternating - complementary logic cl - acl switching mode . during error - free operation , the cl - acl structure operates by complementary logic mode . after an error is detected , it retries by alternating logic mode 在低電源電壓2 . 2v或更低或在0 . 1 m m vlsi工藝條件下,具有大于10 mev能級的宇宙中子流以高達20中子平方厘米小時到達地球表面時所引起的電路的隨機差錯率將是難以接受的。
In this thesis , can bus is used as the system bus , concentrating the research on the feasibility of using redundancy can bus technology in large - scale motor vehicle safety performance detecting & control system . this thesis first gives an overall design of the data collection and control system applied to the front end of a large - scale motor vehicle safety performance detecting & control system . regarding that the bus controller , bus driver and bus transfer medium would fail to function easily , the dual mode cold - redundancy structure is adopted in system to ensure the reliability 本文采用can總線作為系統(tǒng)總線,重點研究冗余can總線技術(shù)應(yīng)用于大型機動車安全性能測控系統(tǒng)的可行性并進行驗證:首先對基于冗余can總線的機動車安全性能測控系統(tǒng)的前端數(shù)據(jù)采集與控制系統(tǒng)進行了總體設(shè)計,考慮到總線控制器、總線驅(qū)動器和總線介質(zhì)都是容易出故障的部件,系統(tǒng)采用了二模冷冗余結(jié)構(gòu)來保障can總線通訊的可靠進行;其次,根據(jù)系統(tǒng)需要,設(shè)計了基于c8051f021的帶冗余can總線通道的數(shù)據(jù)采集與控制模塊,用于采集與處理檢測現(xiàn)場的模擬信號和數(shù)字信號,并自行開發(fā)了can總線應(yīng)用層協(xié)議以及應(yīng)用軟件,通過冗余can總線實現(xiàn)與上位機的可靠通訊;然后,為了驗證冗余can總線設(shè)計方案的可行性,搭建試驗平臺并進行can總線故障切換的試驗;最后對課題的研究工作進行了總結(jié)與展望。
In redundancy structure , the structure ' s distortion and strain will change along with time because of creep . according to the characteristic of concrete ' s creep , the creep grows quickly in the concrete " earlier age . for the long of bridge ' s construction period , the concrete ' s age of different part are discrepantly 在超靜定結(jié)構(gòu)中,結(jié)構(gòu)的變形和內(nèi)力都會因徐變而隨時間不斷變化,對于實際的工程結(jié)構(gòu),結(jié)構(gòu)的整體總是分階段建造起來的,某些荷載(如自重)也是在結(jié)構(gòu)建造過程中分階段作用在不斷生長的結(jié)構(gòu)上的。