油中溶解气体分析(dissolved gas analysis,DGA)是评估变压器绝缘状态和分析变压器绝缘故障的重要依据。灰色多变量预测模型可使用从同一信号中提取的多个诊断指标同时进行预测,从系统的角度对各特征参数进行统一描述, 因而能够获得比...油中溶解气体分析(dissolved gas analysis,DGA)是评估变压器绝缘状态和分析变压器绝缘故障的重要依据。灰色多变量预测模型可使用从同一信号中提取的多个诊断指标同时进行预测,从系统的角度对各特征参数进行统一描述, 因而能够获得比较精确的预测结果。在现有文献研究成果的基础上,对灰色多变量模型做了进一步改进,将灰色多变量模型中的已知条件做了适当的拓广,提出了新的预测方法, 从而使新模型具有更高的精度。变压器油中七种特征气体的预测实例分析验证了该方法的有效性。展开更多
For a class of MIMO plants, using the idea of the high-frequency gain matrix Kp =L2D2S2 factorization, the problem of design and analysis for MRAC is further investigated under the single assumption of known signs of ...For a class of MIMO plants, using the idea of the high-frequency gain matrix Kp =L2D2S2 factorization, the problem of design and analysis for MRAC is further investigated under the single assumption of known signs of the leading principal minors of Kp. By proving the Lp and L2δ relationship properties between the input and the output and the multivariable swapping lemmas, the relation between all the signals in the closed-loop system and the normalized signal is obtained and the stability sand tracking performance of the adaptive system is analyzed rigorously,the proof procedure being more compact.展开更多
文摘油中溶解气体分析(dissolved gas analysis,DGA)是评估变压器绝缘状态和分析变压器绝缘故障的重要依据。灰色多变量预测模型可使用从同一信号中提取的多个诊断指标同时进行预测,从系统的角度对各特征参数进行统一描述, 因而能够获得比较精确的预测结果。在现有文献研究成果的基础上,对灰色多变量模型做了进一步改进,将灰色多变量模型中的已知条件做了适当的拓广,提出了新的预测方法, 从而使新模型具有更高的精度。变压器油中七种特征气体的预测实例分析验证了该方法的有效性。
基金国家自然科学基金，Doctoral Foundation of Shandong Province，山东省自然科学基金
文摘For a class of MIMO plants, using the idea of the high-frequency gain matrix Kp =L2D2S2 factorization, the problem of design and analysis for MRAC is further investigated under the single assumption of known signs of the leading principal minors of Kp. By proving the Lp and L2δ relationship properties between the input and the output and the multivariable swapping lemmas, the relation between all the signals in the closed-loop system and the normalized signal is obtained and the stability sand tracking performance of the adaptive system is analyzed rigorously,the proof procedure being more compact.
