计算机应用与软件
計算機應用與軟件
계산궤응용여연건
Computer Applications and Software
2015年
8期
170-173
,共4页
随机时延%广义预测控制%网络控制系统%参数突变
隨機時延%廣義預測控製%網絡控製繫統%參數突變
수궤시연%엄의예측공제%망락공제계통%삼수돌변
Random delay%Generalised predictive control%Network control system%Parameters change
针对网络控制系统的时延具有随机、时变等特性，提出一种广义预测与递推最小二乘法相结合的预测控制策略。首先针对网络随机时延性，采用广义预测控制算法对随机时延进行估计，并采用网络延迟补偿器根据当前时刻的最新控制信号对网络系统实现有效控制，然后采用递推最小二乘法对被控对象模型参数进行在线辨识，并采用仿真实验测试其与其他控制策略的优劣。仿真结果表明，该控制策略较好地解决了网络控制系统的随机时延难题，改善了网络控制系统在参数突变情况的性能。
針對網絡控製繫統的時延具有隨機、時變等特性，提齣一種廣義預測與遞推最小二乘法相結閤的預測控製策略。首先針對網絡隨機時延性，採用廣義預測控製算法對隨機時延進行估計，併採用網絡延遲補償器根據噹前時刻的最新控製信號對網絡繫統實現有效控製，然後採用遞推最小二乘法對被控對象模型參數進行在線辨識，併採用倣真實驗測試其與其他控製策略的優劣。倣真結果錶明，該控製策略較好地解決瞭網絡控製繫統的隨機時延難題，改善瞭網絡控製繫統在參數突變情況的性能。
침대망락공제계통적시연구유수궤、시변등특성，제출일충엄의예측여체추최소이승법상결합적예측공제책략。수선침대망락수궤시연성，채용엄의예측공제산법대수궤시연진행고계，병채용망락연지보상기근거당전시각적최신공제신호대망락계통실현유효공제，연후채용체추최소이승법대피공대상모형삼수진행재선변식，병채용방진실험측시기여기타공제책략적우렬。방진결과표명，해공제책략교호지해결료망락공제계통적수궤시연난제，개선료망락공제계통재삼수돌변정황적성능。
Aiming at the characteristics of random and time-varying the time delay of network control system has, in this paper we present a novel predictive control strategy which combines the generalised prediction with recursive least square.First, for network random delay property, it uses generalised predictive control algorithm to estimate the random delay, and uses network delay compensator to realise effective control of network system based on current latest control signals, then it adopts the recursive least squares method to make online identification on the parameters of the object model to be controlled, and uses simulation experiments to test its advantages and disadvantages over other control strategies.Simulation results show that the proposed control strategy well solves the problem of random delay of network control sys-tem, improves the performance of the network control system in the circumstance of sudden change in parameters.
