Frey, C.W.C.W.FreyJacubasch, A.A.JacubaschKuntze, H.B.H.B.KuntzePlietsch, R.R.Plietsch2022-03-032022-03-032002https://publica.fraunhofer.de/handle/publica/202735In order to reach an optimal drill effect by using a rotary hammer, it is necessary to control the two variables rotational speed and strike rate of the rotary hammer in such a way that by applying minimal guidance and recoil power a maximal drill speed in the stone hole can be achieved. An optimal drill speed is attained for a certain combination of rotational speed and strike rate. Alterations of drill diameter and/or material hardness lead to a false adjustment of the system which has to be re-optimized by an intelligent re-adjustment of the two servo- controlled drives. For achieving a flexible and automatic adaptation of rotational speed and strike rate of the rotary hammer to altered material and tool types, an adaptive multi-sensoric drive control upon the base of a self-learning neuro-fuzzy component has been developed by IITB in co-operation with an industrial partner.desmart neuro-fuzzy based controlrotary hammer drilloptimal drill effectrotational speedstrike rateminimal guidanceminimal recoil powermaximal drill speedstone holedrill diameter alterationmaterial hardness alterationfalse adjustmentintelligent re-adjustmentservo-controlled driveadaptive multisensory drive control004681journal article