摘要:
時(shí)間系統(tǒng)對(duì)于測控設(shè)備的正常運(yùn)行和故障診斷起著至關(guān)重要的作用.IRIG-B碼是國際靶場試驗(yàn)通用的同步時(shí)間碼.本文基于IRIG-B碼對(duì)某測控設(shè)備的時(shí)間系統(tǒng)進(jìn)行設(shè)計(jì),并在該設(shè)備中成功實(shí)現(xiàn)時(shí)間同步,精度可達(dá)級(jí).與以往的各種方法相比,在解碼的方案中作出了改進(jìn),利用移位寄存器實(shí)現(xiàn)幀同步和碼元邊沿提取,使得設(shè)計(jì)簡單易行,具有較強(qiáng)的容錯(cuò)能力和抗干擾性.同時(shí),本地時(shí)間的正常工作使得設(shè)備在B碼異常的情況下仍然可以獲得準(zhǔn)確的時(shí)間信息,從而為數(shù)據(jù)處理、存儲(chǔ)及事后分析提供精確的時(shí)間定位,具有靈活性,開放性,簡單實(shí)用,功耗低的優(yōu)點(diǎn).%Time System plays very important role in formal function and trouble checking of measurement and control device. IRIG-B is the current synchronization time code in international shooting range. The paper designs the time system of measurement and control device based on IRIG-B , and has realized the time synchronization. It can fully satisfy most measurement and control system requirement. Compared with other methods before, it improves in decode scheme, which makes the design easy to realize. Local time system can ensure the equipment acquire correct time information , and provide time orientation for data processing, storage and analysis afterwards.
摘要:
Based on the characteristics of reentry satellite,there are two kind of time synchronization mode across the flight time.First,the combination of reentry capsule and apparatus capsule time mode.Second,apparatus capsule time mode.As a result,the key point is how to design the time system of the reentry satellite,and how to meet all the goals of the two time mode.The time system of reentry satellite includes time generation,time calibration,time broadcasting and time transmission.The design of time system aims at meeting the demand of time synchronization for the time users.This paper mainly discusses time synchronization demand,time-management model,time system architecture,the design of time system and the test verification of time system for the satellite.%根據(jù)返回式衛(wèi)星的特點(diǎn),衛(wèi)星在軌飛行包括兩個(gè)階段的時(shí)間同步工作模式:1)“返回艙和儀器艙在軌段組合體”時(shí)間模式;2)兩艙分離后,“儀器艙留軌段”時(shí)間模式;因此,如何設(shè)計(jì)返回式衛(wèi)星的時(shí)間系統(tǒng),并進(jìn)行優(yōu)化使其在不同階段完成不同任務(wù),是返回式衛(wèi)星時(shí)間系統(tǒng)設(shè)計(jì)的關(guān)鍵點(diǎn);返回式衛(wèi)星時(shí)間包括時(shí)間產(chǎn)生、時(shí)間維護(hù)、時(shí)間發(fā)布及時(shí)間傳輸;返回式衛(wèi)星時(shí)間系統(tǒng)設(shè)計(jì)就是為了滿足時(shí)間用戶對(duì)時(shí)間同步精度的需求,通過特定方法和必要手段對(duì)星上時(shí)間產(chǎn)生、維護(hù)和發(fā)布機(jī)制進(jìn)行相應(yīng)的系統(tǒng)設(shè)計(jì);針對(duì)實(shí)踐十號(hào)返回式科學(xué)實(shí)驗(yàn)衛(wèi)星時(shí)間同步需求、時(shí)間管理模型、時(shí)間系統(tǒng)架構(gòu)以及時(shí)間系統(tǒng)的設(shè)計(jì)進(jìn)行了說明,并對(duì)衛(wèi)星在整星電測以及在軌運(yùn)行的驗(yàn)證情況進(jìn)行說明.