Abstract:

With the development of the aircraft hydraulic power supply system towards high pressure and large load, the periodic fluid-borne pulsation in piping readily leads to fluid-structure interaction vibration and mechanical fatigue. Because the application of passive pulsation control is not adaptive and inefficient in low frequency conditions, an active control method based on bypass overflow principle is presented. The second pressure wave produced by the piezoelectric direct drive servovalve which is placed in bypass piping counteracts the primary pressure wave in main piping.

Key words: vibration,  , active , control,  , fluid , pulsation,  , piezoelectric , ceramics,  , adaptive , feedforward , control