假肢关节的非反向驱动的基于离合器的自锁机制,以提高操纵稳定性
Yang Liu1, Yuhui Luo2, Ting Xiao3
1State Key Laboratory of Intelligent Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan, China.
Frontiers in bioengineering and biotechnology
|June 14, 2024
概括
假肢手腕的新型非反向驱动离合器 (NBDC) 增强了肢体控制和安全. 这种创新的设计确保了稳定的定位,而不会影响速度或效率.
科学领域:
- 生物医学工程 生物医学工程
- 机器人技术 机器人技术 机器人技术
- 假肢设计 假肢设计
背景情况:
- 恢复手腕的移动性对于截肢者的手操纵和生活质量至关重要.
- 现有的假肢手腕解决方案在不影响性能的情况下,在保持位置方面面临局限性 (不可逆行).
- 一个关键的挑战是设计一个紧的机制,锁定前臂旋转,而不改变传输比率或效率.
研究的目的:
- 为手腕假肢应用引入一种基于线路接触的新型非反向驱动离合器 (NBDC).
- 开发一种机制,使前臂旋转在任何位置和持续时间都能稳定锁定.
- 为了解决当前假肢手腕设计在不向后驱动性,传动比率和效率方面的局限性.
主要方法:
- 开发基于线路接触的非反向驱动离合器 (NBDC).
- 对NBDC工作原理的动态和静态分析.
- 暂时动力学模拟以验证机制的有效性.
- 对自锁和解锁扭矩功能的实验验证.
主要成果:
- 在不改变传动比率的情况下,NBDC实现了非反向驱动,从而保持了运动性能.
- 它通过在前向传动过程中避免额外的摩擦来确保高效率.
- 实验结果显示,自锁扭矩约为600Nmm,解锁扭矩约为80Nmm.
- 该机制有效地防止负载反转扭矩,即使在电源故障期间.
结论:
- 拟议的NBDC显著提高了假肢的稳定性,安全性和舒适性.
- 它提供了一个小型化的解决方案,用于锁定前臂旋转在假肢手腕,改善用户体验.
- 通过提高性能和节能,NBDC为假肢关节系统的发展做出了贡献.
相关概念视频
01:24Wedges
1.1K
A wedge is a simple machine that serves various purposes, such as adjusting the elevation of structural or mechanical parts, providing stability for heavy objects, and splitting a body into two parts. This versatile tool can amplify an applied force, making it easier to manipulate large or heavy objects.
Consider using a wedge to lift a heavy slab. Here, the wedge functions by converting the applied force into a much larger force directed almost perpendicular to the initial force. This...
Consider using a wedge to lift a heavy slab. Here, the wedge functions by converting the applied force into a much larger force directed almost perpendicular to the initial force. This...
1.1K
01:16Self-Locking Screw
1.6K
A square-threaded screw jack is a mechanical device widely used for lifting heavy loads or applying considerable force. One of the key features that can make a screw jack more effective and reliable is its self-locking capability.
A square-threaded screw jack carrying a load is considered self-locking if the screw retains its position even after the moment applied to it is removed.
A square-threaded screw jack carrying a load is considered self-locking if the screw retains its position even after the moment applied to it is removed.
1.6K
01:22Machines: Problem Solving I
315
A toggle clamp is a mechanical device commonly used for holding and clamping objects in various applications, such as woodworking, metalworking, and assembly operations. Consider a toggle clamp subjected to a force of 200 N at the handle. The vertical clamping force can be calculated, provided the dimensions of the toggle clamp are known.
The toggle clamp system is a machine structure consisting of movable, pin-connected multi-force members that form a stabilized system to transmit forces. The...
The toggle clamp system is a machine structure consisting of movable, pin-connected multi-force members that form a stabilized system to transmit forces. The...
315
01:17Frictional Forces on Screws
1.2K
Screws are characterized by a helical ridge known as a thread wrapped around a cylindrical shaft. They are commonly used as fasteners to hold objects together or to transmit power and motion in machines. One type of screw that is particularly useful for transmitting power is the square-threaded screw.
A jack with a square-threaded screw is a mechanical device used to lift heavy loads by applying a force at its handle. When the force is applied, the screw turns, raising the load. The screw can...
A jack with a square-threaded screw is a mechanical device used to lift heavy loads by applying a force at its handle. When the force is applied, the screw turns, raising the load. The screw can...
1.2K
01:14Stability of structures
160
In mechanical engineering, the stability of systems under various forces is critical for designing durable and efficient structures. One fundamental way to explore these concepts is by analyzing systems like two rods connected at a pivot point, O, with a torsional spring of spring constant k at the pivot point. This system is similar in appearance to a scissor jack used to change tires on a car. In this case, the arms of the linkage (equivalent to the rods in this system) are entirely vertical,...
160
01:23Journal Bearings
658
Journal bearings are mechanical components that support and provide lateral stability to rotating shafts and axles. They are crucial in reducing friction, wear, and vibration in machinery such as engines, turbines, and pumps. The principle behind journal bearings is forming a thin lubricant film between the bearing surface and the rotating shaft, which minimizes direct contact and reduces frictional forces.
To better understand the concept of journal bearings, consider a rope winch with dry or...
To better understand the concept of journal bearings, consider a rope winch with dry or...
658