VR Guidance Paradigm And Human-Computer Interaction Strategy For Robot-Assisted Upper Limb Training

The development of virtual reality technology enriches the mode of human-computer interaction,and has important applications in soldiers training,athletes training and rehabilitation training of hemiplegic patients.In order to improve the motor learning effect of robot-assisted upper limb rehabilitation training,it is very important to study VR paradigm design and human-computer interaction strategy.Firstly,this paper establishes the evaluation method of exercise effect,and then studies the influence of VR-based visual feedback guidance paradigm,error amplification and error reduction human-computer interaction strategy on motor learning effect,in order to provide guidance for robot-guided motor training.The main contents of this paper are as follows:Firstly,the evaluation parameters and evaluation methods of upper limb circle and straight line drawing task and homologous contralateral circle drawing task are considered.The validity of the evaluation method is preliminarily verified by experiments.The results also show that the evaluation parameters can effectively evaluate the difference of motor function between left and right hand clockwise and counterclockwise circles and different straight lines(vertical and inclined lines),while the contralateral test in the same body can verify the asymmetry of human body.In order to explore the effect of VR-guided paradigm feedback of real-time visual trajectory on motor learning in right-hand clockwise circle drawing task,a control experiment was designed with or without real-time visual trajectory.The experimental results show that real-time visual trajectory is beneficial to the fast learning and motor retention of the circle drawing task.In order to study the influence of different human-computer interaction strategies on motor learning in different stages,the right-hand counterclockwise circle drawing task of error amplification strategy and error reduction strategy was designed.Three groups of control experiments were carried out: error amplification before error reduction,error amplification after error reduction,and no error interference.The results show that motor learning is influenced by different strategies.Human emotion,i.e.intrinsic motivation,also plays an important role in motor learning.It stimulates human effort in error magnification strategy,and increases confidence and interest in task completion in error reduction strategy.The above research results can provide some support for VR guidance paradigm design and human-computer interaction strategy design of motor training and rehabilitation training.