TAILIEUCHUNG - Advances in Mechatronics Part 11

Tham khảo tài liệu 'advances in mechatronics part 11', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Recognition of Finger Motions for Myoelectric Prosthetic Hand via Surface EMG 189 From the recognition of the finger motion was performed correctly. The operation of the robot hand is determined as follows. In both thumb and index finger extension is in the state where the finger is lengthened and flexion is in the state where the finger is bent at 90 degrees. In control of the thumb the reference value for the flexion was set as rad which is the rotation angle of the pulley required to make the thumb bent at 90 degrees. On the other hand the reference value for the extension was set as 0 rad in order to return the thumb to the original state. Likewise in control of the index finger the reference value for the flexion was set as rad which is the rotation angle of the pulley required to make the index finger bent at 90 degrees. On the other hand the reference value for the extension was set as 0 rad in order to return the index finger to the original state. PI controllers were adopted in the construction of the servo systems and the controller gains of the PI controllers were adjusted by trial and error through repetition of the experiments. The result of the operation of the robot hand is shown in in which the blue dashed line shows the reference value of the rotation angle of the pulley and the red solid line shows the rotation angle of the actual pulley driven by motor. The result shown in is the case where the recognition results of the finger motion for both the thumb and the index finger were successful and both the thumb and the index finger of the robot hand were able to be operated as intended. 6. Conclusion In this chapter a robot hand for myoelectric prosthetic hand which has thumb and index finger and can realize fit grasp motion was proposed and built. In order to control each finger of the developed myoelectric prosthetic hand independently recognition of four finger motions namely flexion and extension of the thumb and .

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