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Paper Information

Journal:   MODARES MECHANICAL ENGINEERING   MARCH 2017 , Volume 16 , Number 12 ; Page(s) 323 To 334.
 
Paper: 

DESIGN AND OPTIMIZATION OF A PASSIVE ASSISTIVE WEARABLE ROBOT FOR KNEE JOINT BASED ON A SIX-BAR MECHANISM

 
 
Author(s):  TAHMASEBI SAFOORA, ZOHOOR HASSAN*
 
* DEPARTMENT OF MECHANICAL ENGINEERING, SHARIF UNIVERSITY OF TECHNOLOGY, TEHRAN, IRAN
 
Abstract: 

In recent years, knee diseases have spread, especially in elderly people. Since performing daily activities such as walking and running the knee supports the weight of the body, it is more likely to be injured. This issue is more important for elderly people who have weak muscles and almost all elderly people suffer from knee pain. One way to help these people to move normally is to use a wearable device to aid the knee. In this article, a passive wearable robot is designed to improve the strength of the elderly who suffer from the knee pain. The robot uses the compliance elements to increase the power of the knee joint in parts of a cycle. This robot is developed based on a Stephenson II six-bar mechanism.
Using this mechanism has the advantage of producing a motion similar to a knee. In other words, this mechanism produces the linear and rotational motions simultaneously. Additionally, more compliance elements can be added to improve the performance of the wearable robot. The optimal dimensions of the robot will be through the kinematics analysis; also, the performance of the robot will be considered based on the derivation of the dynamics equations and the numerical validations of these equations. The performance of the robot mounted on the leg is compared with the human. Obtained results show that less power is required when a wearable robot is used. This proves the merits of the designed robot to be used for the elderly.

 
Keyword(s): WEARABLE ROBOT, SIX-BAR MECHANISM, DYNAMIC ANALYSIS, NUMERICAL OPTIMIZATION, KNEE JOINT
 
References: 
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