Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Hongzhong Zhu"'
Autor:
Hongzhong Zhu
Publikováno v:
IEEE Transactions on Sustainable Energy. 14:75-82
Publikováno v:
Proceedings of International Exchange and Innovation Conference on Engineering & Sciences (IEICES). 7:13-18
Numerical simulation has been carried out to investigate the interaction between electrical wire and floating tower for a new proposed offshore overhead power transmission system. The motion of the TLP-type floating tower is calculated by a potential
Publikováno v:
Journal of Marine Science and Technology. 25:667-674
The integration of wave energy converters and a floating wind turbine has the potential to reduce the cost of energy, since they can share the mooring system and the infrastructure of the power grid. In this study, oscillating-water-column-type wave
Publikováno v:
Renewable Energy. 134:1099-1113
This paper addresses a fundamental study of a floating type shrouded wind turbine on the design, mathematical model and motion analysis. Several novel concepts are introduced to the system for cost reduction: a revolute hinge is applied between the t
Autor:
Makoto Sueyoshi, Hongzhong Zhu
Publikováno v:
Sustainable Energy Technologies and Assessments. 50:101811
Thrust force needs to be taken into account in the development of floating type shrouded wind turbines since it would lead to large tower inclination, and both the power conversion efficiency and the safety margin of the system would be reduced. In t
Autor:
Hongzhong Zhu, Changhong Hu
Publikováno v:
Ocean Engineering. 236:109528
In this paper, a floating overhead power transmission system (FOPTS), which has the potentiality to lower the electricity transmission cost for offshore renewable energy, is studied. In the design, a sheave mechanism is applied to mount one end of co
Publikováno v:
Procedia Computer Science. 105:203-208
Wind energy has shown promising advantages in reducing the greenhouse effect by minimizing carbon dioxide emissions to improve earth climate. Wind turbine which falls under the umbrella of renewable energy family promises cleaner environment while ge
Autor:
Hongzhong Zhu, Shigeo Yoshida
Publikováno v:
IFAC Journal of Systems and Control. 14:100112
This paper presents a robust torsional vibration damper for variable-speed wind turbines based on the disturbance observer method. The damper is designed by explicitly taking into account the pole placement of the closed-loop system in the presence o
Autor:
Hongzhong Zhu, Changhong Hu
Publikováno v:
IFAC-PapersOnLine. 49:380-385
With the development of ocean energy exploration, reliable floating platforms with very small motion are expected to develop. For instance, the maximum pitching amplitude of a floater for floating offshore wind turbine is required to be less than a f
Autor:
Hiroshi Fujimoto, Hongzhong Zhu
Publikováno v:
IEEE/ASME Transactions on Mechatronics. 20:956-966
Ball-screw-driven stages are widely used in industry for long-range and high-precision fabrication. One of the main difficulties in dealing with high-precision motion control is the nonlinear friction, which originates at elastic deformation of the m