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长春职业技术学院 机电学院, 吉林 长春 130033
李玉青(1968— ),女,吉林长春人,副教授;研究方向为机械设计与制造;3281331641@qq.com。
刘宁(1986— ),男,安徽蚌埠人,硕士,讲师;研究方向为机械强度校核及仿真;4103677@qq.com。
纸质出版日期:2023-11-15,
收稿日期:2023-01-01,
修回日期:2023-01-19,
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李玉青,刘宁.一种新型SEA结构设计及弹性单元优化研究[J].机械传动,2023,47(11):129-134.
Li Yuqing,Liu Ning.Design of a New Type of SEA Structure and Optimization of Elastic Elements[J].Journal of Mechanical Transmission,2023,47(11):129-134.
李玉青,刘宁.一种新型SEA结构设计及弹性单元优化研究[J].机械传动,2023,47(11):129-134. DOI: 10.16578/j.issn.1004.2539.2023.11.019.
Li Yuqing,Liu Ning.Design of a New Type of SEA Structure and Optimization of Elastic Elements[J].Journal of Mechanical Transmission,2023,47(11):129-134. DOI: 10.16578/j.issn.1004.2539.2023.11.019.
为了满足康复机器人肘关节运动要求,采用一种应用于串联弹性执行器(Series Elastic Actuator,SEA)的双节点对称螺旋波纹结构弹性单元,将储能比作为优化标准,在相同质量前提下能达到最大储能比,可以更好地吸收机械手臂的振动、保证患者的安全。首先,对SEA进行三维建模;其次,利用有限元软件对转矩弹簧进行仿真分析,得到该弹性单元的安全系数为2.37;最后,加工出实物。实验表明,该弹性单元储能比可达9.63 J/kg,实测刚度
k
r
=264.04 N
<math id="M1"><mo>·</mo></math>
https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=50768537&type=
https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=50768485&type=
1.86266661
2.62466669
m/rad,与模拟刚度的误差为6.86%,且弹性单元的扭转角与转矩呈线性关系,可用于机械手臂柔性连接,为进一步优化机器人打下基础,同时也为解决此类问题提供了一种技术验证手段。
In order to meet the motion requirements of the elbow joint of the rehabilitation robot
a double-node symmetrical spiral corrugated elastic element is applied to the series elastic actuator (SEA)
and the energy storage ratio is used as the optimization standard. Under the premise of the same quality
the maximum energy storage ratio can be achieved
which can better absorb the vibration of the mechanical arm and ensure the safety of the patient. Firstly
the three-dimensional modeling of the SEA is carried out. Then the torque spring is simulated and analyzed by using the finite element software
and the safety factor of the elastic unit is 2.37. Finally
the real object is processed. The experiment shows that the energy storage ratio can reach 9.63 J/kg
the measured stiffness
k
r
is 264.04 N
<math id="M2"><mo>·</mo></math>
https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=50768541&type=
https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=50768540&type=
1.86266661
2.62466669
m/rad
the error of the simulated stiffness is 6.86%
and the torsion angle and torque of the elastic unit are linear and can be used for the flexible connection of the robotic arm
which lays the foundation for the further optimization of the robot
and also provides a technical verification method for solving such problems.
串联弹性执行器弹性单元储能比有限元分析
Series elastic actuatorElastic unitEnergy storage ratioFinite element analysis
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