Prosthetic Hand Fuzzy Control Based on Touch and Myoelectric Signal

This paper introduces a fuzzy control method for myoelectric prosthesis with tactile sense.By recognizing myoelectric signals(MESs) effectively,a bionic control of the prosthetic hand is implemented based on touch and MES.In order to reduce the individual difference of MES,and make it be used reliably by various amputees,a cross-power spectrum coefficient(CSC) method is adopted to deal with MES.The relationship between the cross-power spectrum parameters and the hand movement patterns is analyzed,and the disturbance caused by immeasurable noises in the actual system is eliminated.A fuzzy controller is designed specially to control movement steps of the myoelectric prosthetic hand and make the myoelectric prosthetic hand grasp object stably.Experimental results indicate that this method can not only increase the recognition ratio of movement patterns,but also decrease possible damage to the grasped objects.