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In this paper, a novel sliding mode control (SMC) method is proposed for the small-scale unmanned helicopter with mismatched disturbance. The novel SMC method is developed by designing a new sliding surface with the output of nonlinear disturbance observer (NDO). The proposed method is robust with both matched and mismatched disturbance. Moreover, it can attenuate the chattering problem significantly...
In the impproved fuzzy integrating assessment, all assessment factors are divided into two categories,the quantitative factors and the qualitative factors. For the former detailed evaluation criteria can be easily draw up and its accuracy and uniformity can be maintained. For the latter fuzzy integrating assessment is introduced so that the qualitative factors can be evaluated with quantitative results...
The superheated steam temperature system has the characteristics of high inertia, large delay and time-varying parameters. In this paper, adaptive Smith-PID based on gray prediction was used to deal with these problems. Adaline neural network was used to identify the objectpsilas gain and delay in order to overcome the defectiveness of time-varying parameters. Gray prediction module in the feedback...
Term extraction is a basic research topic to establish knowledge bases. This paper puts forward a new automatic Chinese term extraction based on cognition theory. Supervised by both linguistic knowledge and statistics information of research papers, we improve the traditional fair SCP and C-Value measures originally developed for multi-words, and then present a new comprehensive metric called MC-SCP...
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