Fatigue Analysis of Upper Limb Muscle of Excavator Driver Based on Myoelectric Experiment
Excavator operation requires the driver to push the joystick to control the movement of the robot arm,and this repeated operation for a long time may increase the degree of muscle fatigue.In order to analyze and evaluate the upper limb muscle fatigue degree of excavator drivers,sEMG(surface electromyography)test method was adopted to collect the real-time change data of the upper limb elbow joint angle of excavator drivers during operation through experimental design,data acquisition,data processing and analysis.The relationship between elbow joint Angle and muscle fatigue degree was further analyzed.The results show that in the process of controlling the operation of the arm and bucket of the excavator,the motion range of the elbow joint of the right arm is concentrated in the longitudinal 87°～118° and transverse 17°～38.5°.The fatigue of the right deltoid muscle is the largest when the right arm pushes the joystick to the right,and the fatigue of the right trapezid muscle is the largest in other control states.In the process of controlling the operation of the body platform and the forearm of the excavator,the elbow joint movement range of the left arm is concentrated between 87°～124° in the longitudinal direction and 12°～38.5° in the transverse direction.The fatigue of the left deltoid muscle is always greater than that of other muscles when the left arm pushes the joystick.Based on the measured data,the muscle fatigue degree of excavator driver during operation was analyzed.The results provide data reference for optimizing the man-machine layout of excavator cab.
excavatorsurface electromyographycontrol stickpower spectral density
万方数据
维普
