The Study On Speed And Accuracy Trade-off Of Upper Limb Static Force

When we engaged in target-directed movement,the speed of movement decreased as we pursued speed.To improve accuracy,you must slow down the movement.In motion control,this correlation is called speed and accuracy trade-off,it is necessary to reduce the speed to improve the accuracy of the action.In this regard,Fitts has summarized the Fitts' law through a large number of experiments,the speed and accuracy trade-off law.The purpose of this paper is compare the velocity and accuracy of the static force of the upper limb with the trade-off of the speed and accuracy of the traditional meaning,and explore whether the weighing of the velocity and accuracy of the upper limb obeys Fitts' law without the displacement of the upper limb.In order to find out the law of weighing the speed and accuracy of the static force of the upper limb through the experiment,provide some reference and help for the related research in the future.In this paper,60 non-sports undergraduates(30 males and 30 females)from Dalian University of Technology were selected as research objects.The self-developed pressure sensor test system,Vienna psychological test system,and grip test were used to test and record the test.The finger changes with the mechanical parameters required by the experiment,records the actual movement time,and processes,calculates and analyzes the obtained data.The analysis results are as follows:1.In the target-directed movement of perceptual control,the average movement time and difficulty coefficient of the individual generally change linearly,and there is no significant difference with the traditional target-directed movement law.On this basis,as the target force value increases,the difficulty factor also increases proportionally.2.In the target-directed movement of perceptual control,the shorter the actual exercise time of the individual,the faster the movement speed,and the error in the experiment is getting larger and larger.3.The pressure curve of the initial pressure of the static pressure of the sensing control is very fast and consistent.When the force is close to the target,the motion speed becomes slower to achieve the accuracy required by the motion.The accuracy is higher.High motion,the deceleration phase lasts longer than the acceleration phase.4.When analyzing different individuals,it is found that there are still obvious individual differences when other conditions are the same.According to the above experimental results,we can initially conclude that the research on the speed and accuracy of the static force of the upper limbs is basically consistent with Fitts' law.