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New wind energetic devices with controlled orientation of flat blades to air flow are developed. The proposed device consists of main central wheel and several flat blades hinged to the wheel with the ability to change the orientation of their working surfaces relative to the direction of incoming wind flow. Experimental analysis of blade’s interaction with air flow is performed. Aerodynamic coefficients...
Dynamics of a fin type propulsive device of robotic fish moving inside water is studied. On the basis of Pontryagin's maximum principle the optimal control law for variation of additional area of vibrating tail, which ensures maximal positive impulse of motive forces acting on tail, is found. The proposed method makes it possible to minimize energy losses within operation cycles, when fin's motion...
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