Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Design Consideration01:22

Design Consideration

185
Designing a structure involves a series of considerations, primarily the material's ultimate strength, calculated through tests that measure changes under increased force until the material reaches its breaking point or limit. The ultimate load, where the material breaks, is divided by its original cross-sectional area, resulting in the ultimate normal stress or strength. The ultimate shearing stress is another significant factor taken into account.
The factor of safety is another key...
185
Indeterminate Structure01:18

Indeterminate Structure

530
Indeterminate structures refer to structures where internal forces and reactions cannot be determined using only the equations of static equilibrium.  Indeterminate structures have more unknown forces and reaction forces than equations of static equilibrium that can be used to determine them. Indeterminate structures are often used in engineering to create complex, efficient, and aesthetically pleasing structures. There are various types of indeterminate structures used in engineering and...
530
Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving01:29

Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving

48
Mechanistic models play a crucial role in algorithms for numerical problem-solving, particularly in nonlinear mixed effects modeling (NMEM). These models aim to minimize specific objective functions by evaluating various parameter estimates, leading to the development of systematic algorithms. In some cases, linearization techniques approximate the model using linear equations.
In individual population analyses, different algorithms are employed, such as Cauchy's method, which uses a...
48
Impact Loading01:19

Impact Loading

196
Impact loading occurs when a moving object collides with a stationary structure, such as a rod with a uniform cross-sectional area fixed at one end. Under these conditions, the rod absorbs the kinetic energy from the striking object, leading to deformation and subsequent stress development. As the rod returns to its original position and reaches maximum stress, the absorbed energy, initially manifested as kinetic energy, transforms entirely into strain energy.
In cases of elastic deformation,...
196
Deformation of Member under Multiple Loadings01:11

Deformation of Member under Multiple Loadings

163
When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
163

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Toward an active exoskeleton with full energy autonomy.

Frontiers in robotics and AI·2025
Same author

Emotion and motion: Toward emotion recognition based on standing and walking.

PloS one·2023
Same author

Metabolic power response to added mass on the lower extremities during running.

Applied ergonomics·2023
Same author

Joint kinematic and kinetic responses to added mass on the lower extremities during running.

Applied ergonomics·2023
Same author

Haemodynamics and oxygenation in the lower-limb muscles of young ambulatory adults with cerebral palsy.

Developmental medicine and child neurology·2023
Same author

Biomechanical knee energy harvester: Design optimization and testing.

Frontiers in robotics and AI·2022

相关实验视频

Updated: Jun 24, 2025

Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion
09:32

Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion

Published on: April 11, 2018

9.7K

重新思考外骨基于模拟的设计:使用不同的成本函数的影响.

Barak Ostraich, Raziel Riemer

    IEEE transactions on neural systems and rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society
    |June 4, 2024
    PubMed
    概括

    对被动膝关节外骨架的基于模拟的设计需要先进的方法. 标准的轨迹跟踪阻碍了步态的适应,但多目标的方法可以提高模拟的准确性,并确定最佳的设计,以节省代谢能量.

    科学领域:

    • 生物力学和机器人技术
    • 人与机器的互动 人与机器的互动
    • 外骨架的设计和模拟

    背景情况:

    • 外骨设计通常依赖于实验方法,这些方法耗时且昂贵.
    • 基于模拟的设计为优化外骨参数提供了一个有希望的替代方案.
    • 现有的模拟方法经常使用全轨迹跟踪,这可能不会准确地反映外骨架的步态适应.

    研究的目的:

    • 研究完整轨迹跟踪和模拟用被动膝关节外骨架跑步的多目标优化之间的差异.
    • 开发和验证一种新的多目标成本函数,以提高步态模拟的准确性.
    • 确定一个被动膝关节外骨的最佳设计参数,以最大限度地节省代谢能量.

    主要方法:

    • 使用了2D OpenSim模型,具有10个自由度和18个肌肉,加上Moco优化工具.
    • 测试了在全轨迹跟踪目标函数中不同重量的影响.
    • 开发了一种多目标的成本函数,其中包含一个基于摇摆期间膝盖峰值角度的脚间距术语.

    主要成果:

    • 完整的轨迹跟踪,即使是低重量,在模拟中也阻止了显著的步态适应.
    • 新的多目标成本函数实现了与实验数据相似的模拟步行轨迹 (RMSE=7.4度).
    • 一个带有2.5Nm/deg弹的被动膝关节外骨架设计,在净代谢能量方面表现出高达8%的改善.

    更多相关视频

    A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump
    09:04

    A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump

    Published on: June 1, 2022

    3.1K
    A Virtual Simulation Experiment of Mechanics: Material Deformation and Failure Based on Scanning Electron Microscopy
    06:54

    A Virtual Simulation Experiment of Mechanics: Material Deformation and Failure Based on Scanning Electron Microscopy

    Published on: January 20, 2023

    2.2K

    相关实验视频

    Last Updated: Jun 24, 2025

    Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion
    09:32

    Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion

    Published on: April 11, 2018

    9.7K
    A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump
    09:04

    A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump

    Published on: June 1, 2022

    3.1K
    A Virtual Simulation Experiment of Mechanics: Material Deformation and Failure Based on Scanning Electron Microscopy
    06:54

    A Virtual Simulation Experiment of Mechanics: Material Deformation and Failure Based on Scanning Electron Microscopy

    Published on: January 20, 2023

    2.2K

    结论:

    • 成本函数中的标准轨迹跟踪目标限制了模拟预测外骨与外骨架的步态适应的能力.
    • 多目标优化为模拟外骨辅助运动和确定最佳设计提供了更有效的方法.
    • 超越简单的轨迹跟踪的预测模拟方法是推动外骨发展所必需的.