Progress in aircraft designs heavily depend on Automatic Flight Control System (AFCS). In this work a fuzzy sliding mode controller is designed as a supervisory controller in aircraft pitch control systems and different control strategies to model a pitch controller based on design a pitch angle control in autopilot are invistigated. A performance evaluation based on time response specification...

Instrumental evaluations (e.g. Dobrzynski, InterNoise 90) showed that propeller noise can be reduced by asymmetrical blade spacing. Compared to conventional propellers with 6 blades and symmetrical spacing of 60°, propellers with asymmetric spacing of 15° produce about 3 dB(A) less level, in particular for high helical blade tip Mach numbers HBTMN. Since the aerodynamic propeller performance is...

The horizontal axis wind turbine (HAWT) design with low speed requires blade geometry selection. analysis uses the potential flow panel method and integral boundary layer formulation to analyze around airfoil. element momentum (BEM) theory has an aerodynamic coefficient value along blade. Power calculates model shear pressure at each This research aims determine rotor based on performance, incl...

In this study, a moderately flexible rotor is investigated experimentally in water channel. The consists of single blade with simplified rectangular geometry and tested various pitch angles at different rotational speeds. flapwise bending deformation induced torsion the are measured using image processing tools, flow fields extracted Particle Image Velocimetry. behaviour depends strongly on ang...

Flexible blade cutting applied on thick layers of foam is very feasible for creating large sized physical models. The heated tool is set and moved in a circumferential tool motion along the front face of the layer. During these primary motions the cutting tool is positioned in order to ensure the best tool position and tool orientation for the cutting process. The adjustment of the tool positio...

An aeroelastic model of a smart rotor system (which incorporates blade-mounted trailing-edge flap actuators and conventional root pitch actuation) is presented in linear time invariant state space form. The servo-flap deflections are modeled as producing incremental lift and moment variations, so that any linear aerodynamic actuator can be evaluated. This smart rotor model is used to conduct pa...

Abstract Wind turbines are a major source of renewable energy. Load monitoring is considered to improve reliability the systems and reduce cost operation. We propose load system which consists inertial measurement units. These track movement rotor blade, hub tower top. In addition, wind turbine states, e.g. yaw angle, pitch angle rotation speed, recorded. By solving navigation algorithm with Ka...

The wind power industries arepresently the fastest raising renewable energy sector throughout the world compare to other sourses. the main aim of this paper is to develop the mathematical model and implemented in simulations for torque control of two bladed and three bladed wind turbine, by changing coefficient of power, tip speed ratio and pitch angle values for different wind speeds.To ensure...