BACKGROUND There are few studies comparing the biomechanical properties of angled blade plate and locking compression plates in supracondylar osteotomy. In the current randomized study, we prospectively compared the clinical and radiological outcomes of supracondylar osteotomy using these two plates. METHODS Forty patients with valgus knee malalignment were randomly assigned to two equal numb...

Wind energy conversion systems (WECS) have become increasingly common in recent years as a result of global warming. WECS needs to release the wind through pitch control during high winds. In this study, novel method for individual (IPC) via pitching moment estimation is designed. The conventional IPC considers blade load, without keeping rotor speed at rated value. This study proposes applicat...

Due to high electricity prices and possible shortages of gas other energy commodities, various fluctuations in generation will need be regulated. Given the increasing expansion wind power plants Europe worldwide. It is necessary essential put regulation into practice, as mandated by 2016/631 EU. A significant balance problem may arise on grid, which lead cyclical recurring blackouts future. The...

Floating offshore wind turbines (FOWTs) are systems with complex and highly nonlinear dynamics; they subjected to heavy loads, making control classical strategies a challenge. In addition, experience vibrations due waves. Furthermore, the of blade angle itself may generate vibrations. To address this issue, in work we propose design an intelligent system based on fuzzy logic maintain rated powe...

INTRODUCTION Cross-flow turbines present several advantages over axial flow types for power generation from moving water. First, the rectangular form factor is well suited to take advantage of the hydrokinetic energy often concentrated in shallow channels. This form factor presents an opportunity to construct arrays with high blockage (ratio of swept area to channel cross-sectional area), poten...

In the next decennia, upscaling even towards 10 MW wind turbines may be necessary to lower the costs of offshore wind energy. This requires considerable reductions of turbine loads. Variable speed turbines with active pitch control are most favorable and prevailing nowadays. Currently, the turbine blades are turned collectively to limit the excess of wind power and to regulate the rotor speed a...

As wind turbines increased in size and power, control specifications became more challenging and regulation mechanisms more sophisticated. More and more reliable and powerful model control strategies are needed not only to keep the turbine within its safe operating region but also to improve efficiency and quality of power conversion. This paper mainly focuses on the mechatronic modeling and co...