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Given the characteristics of MW-level direct-drive permanent magnet synchronous generator (PMSG), a simple sensorless low-pass-filter-compensation-integrator (LPFCI)-based rotor flux position estimation control method is proposed. Its implementation principle is introduced in detail. Furthermore, saturation feedback double integrator based on coordinate transform (SFDICT) and LPFCI are discussed in...
The aim of this study is to analisis the method of estabishing a model of AmOn integrative nutrients removal reactor, and based on the results of experiments, to optimize the operating conditions as well. The ASM mechanisms and WEST software were unilized in the model. Results showed that the relatively errors of COD, NH3-N, TN and TP between value of experiment and simulated are 7.2%, 9.1%, 12.5%...
It is used to research the performance effect of electrical enterprise executives by fuzzy synthetic decision. With fuzzy mathematics theory, the models of fuzzy synthetic decision are built by designing questionnaire for the performance characteristics of electrical enterprise executives. According to maximum membership principle, the best decision will be found after multilevel synthetic processing...
It has been studied how to construct the fuzzy linear regression model and to calculate the fuzzy regression coefficients in the paper. Based on above work, selecting diesel fuel properties: density, polyaromatics, cetane number and back end distillation as the independent variables, and engine emissions: total hydrocarbons (HC), carbon monoxide (CO), nitrogen oxides (NOx) and particulate matters...
This paper introduced the operation principle of current mode control boost converter. The equations of two different work states were built by applying the theory of KCL and KVL. Two models working in CCM and DCM were respectively established using Matlab/Simulink and the nonlinear phenomenon of boost converter can be observed through simulation. The results of theoretical analysis are corresponded...
The optimization of multi-objectives is crucial to the functional configuration design of industrial products, especially to the functional design of mobile devices. In the design of mobile devices, due to the complexity of functional implementation and their interactions, an optimized functional configuration for a product is hardly to achieve. In this paper, the functional configuration design of...
DC-DC converters are the kernel parts in the switching power supplies. There are abundant dynamical behaviors in them. In order to discover all these linear and nonlinear phenomena, it is demanded to put forward some appropriate modeling methods. This article discusses the modeling methods, which aimed at some familiar DC-DC converters under the control of voltage and current mode. They include exact...
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