Application Research of the Parallel System Theory and the Data Engine Approach in Wind Energy Conversion System

Abstract

The parallel system is a kind of scientific research method based on an artificial system and computational experiments, which can not only reflect the dynamic process of the real system but also optimize its control process in real time. Given the rapid development of wind energy technology, how to shorten the development and deployment cycle and decrease the programming difficulties of wind energy conversion system (WECS) are major issues for improving the utilization of this form of energy. In this paper, the Data Engine is used as a computing environment to form a parallel WECS for studying the engineering application of WECS. With the support of the programming methods of graphical component configurations, visualization technology and dynamic reconfiguration technology, a maximum power point tracking (MPPT) computing experiment of the parallel WECS is carried out. After comparing with MATLAB simulation results, the parallel WECS is verified as having good performance. The Data Engine is an ideal computing unit for modeling and computation of the parallel system and can establish a parallel relationship between the artificial system and the real system so as to achieve the optimal control of WECS.

Impact of winding on nanoimprinted surfaces in roll‐to‐roll nanoimprint lithography

“…The stress distribution in the wound roll is calibrated to avoid defects, such as telescoping at low pressure or blocking at high pressure, by winding under a chosen tension. [ 37–39 ] The resulting stresses in the roll are not uniform, as the first layer against the core is subjected to the highest pressure, which decreases down to zero in the last layer. Winding models aim at estimating the contact pressure on any web layer in the roll.…”

“…These models assume the stress only depends on web properties and on the radial location of the layer in the roll, not on the axial or circumferential position. The material behaviors included in the winding models have increased in complexity from the first isotropic linear elastic models, [ 42–45 ] to the introduction of a pressure‐dependent radial modulus, [ 37,39,46,47 ] to isotropic [ 48 ] and anisotropic [ 38,49 ] linear viscoelastic, to orthotropic viscoelastic with nonlinear radial modulus. [ 40,41,50 ] Viscoelastic winding models consider the coupling between the creep of the web material and the contact pressure in the wound web.…”