Higher Harmonic Control(HHC) is an emerging concept applied for performance improvement and vibration reduction in helicopters and wind turbines. A HHC system is an active vibration control mechanism where the blades are oscillated at higher harmonics of the rotation speed. This can be achieved either having control inputs in rotating frame, that is above the swash plate or in non rotating frame, that is below the swash plate. Nevertheless, providing control inputs for HHC from a nonrotating frame is usually achieved by having time varying cyclic inputs. Here, we propose a scotch-yoke mechanism which oscillates at higher frequency than the main rotor and driven by the rotor itself and is capable of generating the higher harmonics. Effectiveness of the mechanism is demonstrated by motion analysis of the CAD model and Fourier analysis of the resulting blade motion. © 2015 by.