Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Stability of Equilibrium Configuration: Problem Solving

Stability of Equilibrium Configuration: Problem Solving

The stability of equilibrium configurations is an important concept in physics, engineering, and other related fields. In simple terms, it refers to the tendency of an object or system to return to its equilibrium position after being disturbed. The stability of an equilibrium configuration can be analyzed by considering the potential energy function of the system and examining its behavior near the equilibrium point.
Problem-solving in the context of the stability of equilibrium configuration...

Stability of structures

Stability of structures

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,...

Oscillations about an Equilibrium Position

Oscillations about an Equilibrium Position

Stability is an important concept in oscillation. If an equilibrium point is stable, a slight disturbance of an object that is initially at the stable equilibrium point will cause the object to oscillate around that point. For an unstable equilibrium point, if the object is disturbed slightly, it will not return to the equilibrium point. There are three conditions for equilibrium points—stable, unstable, and half-stable. A half-stable equilibrium point is also unstable, but is named so because...

Stability of Equilibrium Configuration

Stability of Equilibrium Configuration

Understanding the stability of equilibrium configurations is a fundamental part of mechanical engineering. In any system, there are three distinct types of equilibrium: stable, neutral, and unstable.
A stable equilibrium occurs when a system tends to return to its original position when given a small displacement, and the potential energy is at its minimum. An example of a stable equilibrium is when a cantilever beam is fixed at one end and a weight is attached to the other end. If the weight...

Linear Approximation in Time Domain

Linear Approximation in Time Domain

Nonlinear systems often require sophisticated approaches for accurate modeling and analysis, with state-space representation being particularly effective. This method is especially useful for systems where variables and parameters vary with time or operating conditions, such as in a simple pendulum or a translational mechanical system with nonlinear springs.
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length, the...

Indeterminate Structure

Indeterminate Structure

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 some...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Light-exposure at night impairs mouse ovary development via cell apoptosis and DNA damage.

Bioscience reports·2019

Same author

Identification of oxidative stress-related Xdh gene as a di(2-ethylhexyl)phthalate (DEHP) target and the use of melatonin to alleviate the DEHP-induced impairments in newborn mouse ovaries.

Journal of pineal research·2019

Same author

Biomechanical analysis of the effect of medial meniscus degenerative and traumatic lesions on the knee joint.

American journal of translational research·2019

Same author

Design and biomechanical characteristics of porous meniscal implant structures using triply periodic minimal surfaces.

Journal of translational medicine·2019

Same author

Hypertriglyceridaemia-associated acute pancreatitis: diagnosis and impact on severity.

HPB : the official journal of the International Hepato Pancreato Biliary Association·2019

Same author

Tracking Decitabine Incorporation into Malignant Myeloid Cell DNA in vitro and in vivo by LC-MS/MS with Enzymatic Digestion.

Scientific reports·2019

Search research articles

Related Experiment Video

Updated: Jul 10, 2026

Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior

Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior

Published on: April 16, 2014

Stability analysis of the lambda-model during fast elbow movements.

Lan Li¹, Zhu Kuanyi

¹School of Electrical and Electronic Engineering, Nanyang Technological University, 639798 Singapore. lanli@pmail.ntu.edu.sg

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference

|November 16, 2007

Summary

This study analyzes motor control system stability during fast elbow movements using the lambda-model. Tuning central nervous system commands to muscle and system properties ensures robust and reproducible motion.

More Related Videos

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

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

Published on: April 11, 2018

Experimental Methods to Study Human Postural Control

Experimental Methods to Study Human Postural Control

Published on: September 11, 2019

Related Experiment Videos

Last Updated: Jul 10, 2026

Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior

Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior

Published on: April 16, 2014

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

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

Published on: April 11, 2018

Experimental Methods to Study Human Postural Control

Experimental Methods to Study Human Postural Control

Published on: September 11, 2019

Area of Science:

Biomechanics
Motor Control
Robotics

Background:

Stability is crucial for reproducible motions and robustness in biological and artificial motor control systems.
The lambda-model, based on the equilibrium point hypothesis (EPH), is a framework for understanding motor control.
Fast movements present unique challenges to system stability due to limited time for adjustments.

Purpose of the Study:

To analyze the stability of the lambda-model during fast elbow movements.
To determine the operational regions for descending commands that ensure system stability.
To investigate the relationship between control parameters and system robustness.

Main Methods:

Modeling the elbow joint with antagonist Hill-type muscles in a horizontal plane.
Utilizing the physiological lambda version of the equilibrium point hypothesis (EPH) for muscle activation.
Applying Lyapunov theory and contraction theory for analytical calculation of global stability conditions.

Main Results:

Identified specific operational regions for descending commands (R, C, mu).
Demonstrated that stability is contingent upon the precise tuning of these commands.
Quantified the influence of muscle properties, geometry, and linkage system characteristics on stability.

Conclusions:

Descending commands from the central nervous system (CNS) must be carefully tuned.
Tuning must consider muscle properties, muscle geometry, and linkage system geometry.
Proper tuning guarantees the stabilizing ability and robustness of the motor control system.