Yaw dynamics of horizontal axis wind turbines. Final report

摘要: Designers of a horizontal axis wind turbine yaw mechanism are faced with difficult decision. They know that if they elect to use yaw- controlled rotor then the system will suffer increased initial cost and inherent maintenance reliability problems. On other hand, allow freely known have account for unknown random, though bounded, rates. higher-risk design trade-off against potential savings improvement. The risk yaw-free could be minimized methods were available analyzing understanding behavior. complexity behavior has, until recently, discouraged engineers from developing complete analysis method. objectives this work (1) provide fundamental free-yaw mechanics concepts most effective at eliminating problems, (2) tested tools guidelines by systems manufacturers. emphasis is on practical sufficiently accurate methods.