Research On Design And Manufacture Of Bionic Multi-axis Ankle Prosthesis With Adjustable Joint Axes

In modern society,more and more people have lower body amputations due to accidents,injuries and other reasons.As an auxiliary walking device,the demand for lower body prostheses is increasing,and there are more and more scientific researches related to lower body prostheses.However,at present,more research and experiments are carried out on knee joint prostheses.This kind of prosthesis often has a highly intelligent knee joint structure,but the ankle joint structure is relatively simple,and usually only simple plantar dorsiflexion can be achieved.Unfavorable gait.Although the existing active ankle joint prostheses on the market can simulate the walking gait of the human body to a large extent,the high price and large weight make it impossible to popularize.Most passive ankle joint prostheses are mainly based on simple plantar dorsiflexion movement,which is quite different from the biomechanical characteristics of the human ankle joint.The main tasks of the adjustable ankle prosthesis are as follows:1.Learn the relevant knowledge of ankle joint biomechanics,clarify the design points,conduct 3D model modeling,design a variety of adjustable multi-axis ankle joint prostheses,and understand the complexity,operability,and processability of each ankle joint prosthesis,compare the pros and cons of size and weight,select the most suitable ankle joint prosthesis for finite element analysis,parts selection,process optimization,and then process a physical prototype.2.Invite lower body amputee patients to perform human wearing experiments on this adjustable multi-axis ankle joint prosthesis.Use the Vicon acquisition system to collect the motion data of the lower limbs during the human walking process,and use the force plate to measure the mechanical data during the human walking process.collection.3.Analyze and calculate the kinematics and mechanical data measured by the human body wear test.Analyze the ground reaction force,ankle joint angle and ankle joint torque,and establish a mathematical model for theoretical calculation;the collected data is processed in a regular manner to facilitate the subsequent analysis of the ground reaction force,joint angle and torque on the prosthetic side and the healthy limb side.Calculate;use Matlab to process the test data to obtain the ground reaction force curve,ankle joint torque curve,and ankle joint angle curve.Through the different characteristics of different prosthetic curves,analyze the pros and cons of the prosthesis,and further explain the adjustable multi-axis ankle joint prosthesis advantages.