Damping of two deformation modes by one control loop has been demonstrated by simulation for a typcial 3 MW wind turbine. The vibration levels of the 2 and 3 in-plane modal modes were significantly reduced. Calculations with the aerodynamic code PHATAS showed an overall in-plane fatigue load reduction by ca 40%. The control loop includes a Kalman filter that estimates state variables for the mo...

Six application benchmarks, including four numerical aerodynamic simulation (NAS) codes, provided by H. Jin and J. Wu, were previously parallelized using OpenMP and message-passing interface (MPI) and run on a 128-processor Silicon Graphics Inc. (SGI) Origin 2000. Detailed profile data were collected to understand the factors causing imperfect scalability. The results show that load imbalance a...

ROYAL AIRCRAFT ESTABLISHMENT Some simple conical c~mbcr shapes to produce low lift-depend,cnt drag on a slender delta wing G. G. Brebner This note presents some of the theoretical aerodynamic characteristics of narrow delta wings having flat csntre portions and two types of simple conical camber designed to produce zero load at the leading edge at the design C,.,. Slender wing theory is used in...

The skin structure of sensor pod mounted on the exterior aircraft can be exposed to acoustic dynamic load and static such as aerodynamic pressure inertial during flight. Fatigue life prediction structural model under should performed also differential stiffness modified by considered. noise test spectrum MIL-STD-810G was applied stress response power spectral density (PSD) calculated. frequency...

This paper presents the static calculation of mobile radar station antenna fabric design, taking into account action its own weight load-bearing structure products combined with load from limit wind flow. Part elements are made advanced orthotropic material alumoglass plastic, which will allow to significantly gain in while maintaining necessary rigidity and strength. On basis aerodynamic calcu...

The high-speed maglev train will be subjected to extremely obvious aerodynamic load and instantaneous impact during passing another train, which brings significant challenges the train’s suspension stability safe operation. It’s necessary consider influence of shock waves in design control algorithms. Traditional proportion integration differentiation (PID) cannot follow change vehicle paramete...