Research And Design Of Rehabilitation Training Device After Unpowered TKA

With the gradual rise of rehabilitation medicine,the rehabilitation training after total knee arthroplasty(TKA)surgery has received attention from people,and the development of rehabilitation aids has therefore received attention from domestic and foreign researchers.Non dynamic TKA postoperative rehabilitation aids can effectively help patients recover joint function and correct potential functional issues before and after surgery.On the basis of studying the gait patterns of human lower limbs,this artiele designs an unpowered lower limb rehabilitation assistive device for muscle strength training after TKA surgery,innovatively designs the structure/mechanism of the assistive device,and conducts experimental research on its feasibility.The main research content of this article is follows:(1)Obtain gait data for TKA postoperative rehabilitation training.The motion capture system is used to collect the data of the subjects,and the data is post-processed in Seeker software to obtain the changes of hip and knee joint angles of human lower limbs,and the joint angle data is input into Matlab to obtain joint torque.(2)Structural design of unpowered rehabilitation aids.Based on the sagittal gait data of human lower limbs and combined with the rehabilitation needs after TKA,the requirements for the structural design of assistive devices are put forward.The overall structure of the assistive device is composed of leg connecting rod,joint transmission mechanism and damping mechanism,which can meet the lower limb function and muscle strength training of patients in walking and siting posture.After the design schene is determined,finite element analysis is carried out on the key parts of the model to verify the rationality of the part design.(3)Dynamic analysis of rehabilitation aids.The lower limb dynamics model was established by using Lagrange equation,and the dynamics analysis of rehabilitation aids after TKA was carried out.The numerical simulation is carried out using Matlab,and the results are compared with the dynamics simulation results of Adams software.The simulation results verify the correctness of the established dynamics model.Finally,the simulation moment of hip and knee joints before and after wearing assistive devices is compared in Adams software,and the feasibility of rehabilitation assistive devices is preliminarily verified.(4)Experimental verification of rehabilitation aids.On the basis of theoretical support,the feasibility of rehabilitation assistive devices was experimentally verified,the experimental data obtained were analyzed,and the hip and knee joint torque before and after wearing the assistive devices and the changes of the surface EMG signals of the quadriceps femoris and hamstring muscles of the lower limbs were compared to finally verify the feasibility of rehabilitation assistive devices.