Tandem experiment facility with five degrees of freedom for simulating ankle gaits

Abstract

The invention discloses a tandem experiment facility with five degrees of freedom for simulating ankle gaits. The tandem experiment facility comprises a general framework, a tibial shaft, a cadaver ankle tibia insertion rod, a frontward and backward movement mechanism and control system, a sagittal-plane-within rotation mechanism and control system, a coronal-plane-within rotation mechanism and control system, a level-within rotation mechanism and control system, a vertical movement mechanism and control system, a tibia loading mechanism and control system, and a muscle loading mechanism and control system. The tandem experiment facility can simulate kinematics actions in the stance phase of the ankle giants within 3 seconds to 5 seconds, can simulate dynamics in the stance phase of the ankle giants, and can collect ankle kinematics and dynamics data to obtain complete, comprehensive and effective data of original experiments on kinematics and dynamics in the stance phase of the ankle gaits, thereby providing a dynamics experiment and theoretical research platform for discussions of clinical ankle motion system disease mechanism, scientific verification of operative plans, researches of ankle motion injury and protection, development of bionic ankle systems, and the like.

Description

technical field [0001] The invention relates to a device in the technical field of electromechanical systems, in particular to a device for simulating human foot and ankle gait and measuring. Background technique [0002] The ankle complex participates in human movement and is the final weight-bearing part of the human body. When standing, 50-60% of the body weight is distributed on the heel, and 40-50% is distributed on the metatarsal head; when walking normally, the weight of the foot is 1.2 times the body weight; when running, it is doubled; like hurdles, basketball and volleyball, etc. Sports events, when landing, bear the impact force of 3.5 to 7 times their own body weight, which is closely related to sports injuries of the lower limbs. [0003] Among the joint injuries, the ankle is the most common, up to 64.6%; the medial and lateral ankle ligament injuries account for about 80% of the systemic ligament injuries, ranking first; 80% of the elderly population has ankl...

AI Technical Summary

Problems solved by technology

[0007] Only 2 or 3 of the six degrees of freedom of tibial motion are controlled, which cannot reflect the real motion and force; the rate of tibial motion cycle and the rate of muscle force application are too reduced, so, for continuous The time for the real walking and landing attitude phase is only 0.6-0.8 seconds, but the simulation in the simulator only reaches 20 seconds, 11 seconds, and the fastest can only reach 2 seconds

Namely, the dynamic model does not take into account the key dynamic influences on walking motion; the device combines the peroneus longus and brevis muscles, while anatomically, they are only related to their attachment points (tibia / fibula), so their attachment It is completely different from the function, so the control of muscle force is not accurate enough, and the excitation of all muscles is not considered separately; the load applied by the upper part of the human body cannot be fully simulated, and generally only reaches about half of the real state

Images