The construction hoist drive system is a critical component of the hoist, and high speed low vibration noise are essential development directions. In order to improve NVH level system, this paper carries out research analysis excitation, establishes rigid-flexible coupling dynamics model, completes establishment model simulation analysis, optimization work. Ansys Motor CAD 2020 was used establi...

[1] The three-dimensional (3-D) density structure of the solar corona is a fundamental boundary condition on the solar wind. Most easily applied models of the global coronal density have been restricted to date to axisymmetric 2-D cases. We present here a 3-D model made up of a superposition of multiple streamers, having distinct gaussian widths in longitude and latitude and both longitudinal a...