激光杂志
激光雜誌
격광잡지
LASER JOURNAL
2014年
7期
46-49,54
,共5页
张大帅%葛文萍%赵俊飞%李华杰
張大帥%葛文萍%趙俊飛%李華傑
장대수%갈문평%조준비%리화걸
IEEE1588%同步精度%时钟偏移%误差分析%卡尔曼平滑滤波
IEEE1588%同步精度%時鐘偏移%誤差分析%卡爾曼平滑濾波
IEEE1588%동보정도%시종편이%오차분석%잡이만평활려파
IEEE1588%Synchronization accuracy%Clock offset%error analysis%Kalman-smoothing filter
为了减小网络传输抖动误差对IEEE1588时间同步协议的影响,提高网络授时精度,本文对IEEE1588协议的原理进行了研究,并提出了卡尔曼平滑滤波修正算法。首先,详细分析了影响同步精度的几个因素,依据IEEE1588延迟请求响应机制,分析推导了偏移测量值的噪声模型,并在此基础上对卡尔曼平滑滤波算法进行仿真,仿真中对比滤波前后的同步精度,验证了该设计的可行性和算法的有效性。
為瞭減小網絡傳輸抖動誤差對IEEE1588時間同步協議的影響,提高網絡授時精度,本文對IEEE1588協議的原理進行瞭研究,併提齣瞭卡爾曼平滑濾波脩正算法。首先,詳細分析瞭影響同步精度的幾箇因素,依據IEEE1588延遲請求響應機製,分析推導瞭偏移測量值的譟聲模型,併在此基礎上對卡爾曼平滑濾波算法進行倣真,倣真中對比濾波前後的同步精度,驗證瞭該設計的可行性和算法的有效性。
위료감소망락전수두동오차대IEEE1588시간동보협의적영향,제고망락수시정도,본문대IEEE1588협의적원리진행료연구,병제출료잡이만평활려파수정산법。수선,상세분석료영향동보정도적궤개인소,의거IEEE1588연지청구향응궤제,분석추도료편이측량치적조성모형,병재차기출상대잡이만평활려파산법진행방진,방진중대비려파전후적동보정도,험증료해설계적가행성화산법적유효성。
An improved algorithm of the Kalman-smoothing filter is presented in order to reduce the network transmission jitter error effect on IEEE1588 time synchronization protocol and to improve the accuracy of the net-work timing. Several factors affecting synchronization accuracy are analyzed in detailed, then noise model of offset measurements is derived based on IEEE1588 delay request-response mechanism. Kaman-smoothing algorithm is simulated. In the simulation, the synchronization precision of before and after filtering is compared. The simulation results indicated the feasibility of the design and the effectiveness of the algorithm.