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In the paper, a nonlinear modeling approach for a class of unmanned-aerial-vehicle (UAV) helicopters is presented. The applied approach adopts a component buildup method to calculate the component forces and moments. In order to improve the modeling accuracy and applicability, the rotor dynamics are detailedly analyzed by taking into account the influences of airspeed in hub center and the coupling...
The meminductor is a novel kind of electronic device with dynamic variable inductance. On account of its unique memory property, meminductor has garnered increasingly extensive interest from numerous researchers. However, as a nanoscale circuit element, meminductor has been facing huge challenges of variation control during the manufacture process. In this paper, three types of nonlinear meminductor...
Equipment productivity in semiconductor manufacturing has been becoming one of the major topics due to the high equipment price. To calculate the productivity based on the running logs is easier and more precise. However, the engineers may often be assigned to estimate the productivity of the equipment in the design phase for making the investment decision or predicting the project benefit. In such...
In this paper, the problems of fuzzy modeling of activated sludge wastewater treatment processes and predictive control of dissolved oxygen are investigated. A structure identification algorithm is proposed, by which the structure of the fuzzy rules can be constructed according to the Activated Sludge Model No.1 (ASM1). Utilizing the fuzzy c-means cluster algorithm, the required fuzzy space of input...
Production line is a complicated system which comprises many various interacting elements. A complex weighted network model is presented to describe and analyze service capacity of production line in this paper. Manufacturing units are regarded as vertices to denote various resources, such as equipments and workers. The production processes could create directed edges and network topological structure...
Mixed production line is a complex system which comprises various dynamic elements and complicated structure, so it is difficult to describe and model. In this paper complex weighted network is presented, while mixed production line is simplified to vertices and directed edges in a weighted networks. Manufacturing units are regarded as vertices to denote various resources, such as equipments and workers...
In this paper, a novel estimation method on Volterra series high-order kernels to nonlinear dynamic system to arbitrary approximation is proposed. On the theoretical basis of kernel function, by the construction of linear space, the issue of solving the Volterra series order kernels is converted to solving the projection of the output of the observation vector in the a sub-space of Hilbert space,...
In this paper, a novel method to identify Volterra kernels of nonlinear and dynamical systems is proposed, The new notions introduced here develops an implementation of accurate and efficient nonparametric algorithm for the identification of Volterra series orders up to arbitrary precision. The model of aeroturbine is constructed using Volterra series. It is demonstrated that the speed of the turbine...
A micromachined acceleration sensor for high-g detection is presented, which introduces silicon carbide as a mechanical material. The sensor structure itself consists of a fixed capacitor and a changeable one whose top plate moves perpendicular to the chip surface. The external acceleration can be obtained by measuring the change of the capacitance. Conventional surface micro-machining technologies...
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