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

Pole and System Stability

Pole and System Stability

The transfer function is a fundamental concept representing the ratio of two polynomials. The numerator and denominator encapsulate the system's dynamics. The zeros and poles of this transfer function are critical in determining the system's behavior and stability.
Simple poles are unique roots of the denominator polynomial. Each simple pole corresponds to a distinct solution to the system's characteristic equation, typically resulting in exponential decay terms in the system's response.

Stability

Stability

The time response of a linear time-invariant (LTI) system can be divided into transient and steady-state responses. The transient response represents the system's initial reaction to a change in input and diminishes to zero over time. In contrast, the steady-state response is the behavior that persists after the transient effects have faded.
The stability of an LTI system is determined by the roots of its characteristic equation, known as poles. A system is stable if it produces a bounded...

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...

Rigid Body Equilibrium Problems - II

Rigid Body Equilibrium Problems - II

A rigid body is in static equilibrium when the net force and the net torque acting on the system are equal to zero.
Consider two children sitting on a seesaw, which has negligible mass. The first child has a mass (m1) of 26 kg and sits at point A, which is 1.6 meters (r1) from the pivot point B; the second child has a mass (m2) of 32 kg and sits at point C. How far from the pivot point B should the second child sit (r2) to balance the seesaw?

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,...

Rigid Body Equilibrium Problems - I

Rigid Body Equilibrium Problems - I

A rigid body is said to be in static equilibrium when the net force and the net torque acting on the system is equal to zero. To solve for rigid body equilibrium problems, do the following steps.

You might also read

Related Articles

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

Sort by

Same author

Neck Angle in the Handstand Changes the Pattern of Multi-Joint Variability.

Journal of motor behavior·2025

Same author

Wobble Board Instability Enhances Compensatory CoP Responses to CoM Movement Across Timescales.

Sensors (Basel, Switzerland)·2025

Same author

Dimensions of the functional degrees of freedom of the first serve in tennis.

Journal of sports sciences·2025

Same author

Deficits in recovery of postural stability after stepping are limb- and phase-specific in children with unilateral cerebral palsy.

Gait & posture·2024

Same author

The evolving high bar longswing in elite gymnasts of three age groups.

Journal of sports sciences·2023

Same author

Strength training as a dynamical model of motor learning.

Journal of sports sciences·2023

Search research articles

Related Experiment Video

Updated: Jun 21, 2026

Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability

Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability

Published on: September 18, 2020

Development of dynamic stability in children's rhythmic movement.

Eric G James¹, S Lee Hong, Karl M Newell

¹Department of Kinesiology, The Pennsylvania State University, University Park, PA 16802, USA.

Developmental Psychobiology

|July 8, 2009

Summary

Motor pattern stability increases with age. Children and adults showed more stable rhythmic movements as they got older, even with changes in foot support.

More Related Videos

Quantifying Learning in Young Infants: Tracking Leg Actions During a Discovery-learning Task

Quantifying Learning in Young Infants: Tracking Leg Actions During a Discovery-learning Task

Published on: June 1, 2015

Related Experiment Videos

Last Updated: Jun 21, 2026

Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability

Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability

Published on: September 18, 2020

Quantifying Learning in Young Infants: Tracking Leg Actions During a Discovery-learning Task

Quantifying Learning in Young Infants: Tracking Leg Actions During a Discovery-learning Task

Published on: June 1, 2015

Area of Science:

Motor control
Developmental psychology
Biomechanics

Background:

Rhythmic motor patterns are crucial for daily activities.
Understanding the developmental trajectory of motor pattern stability is important.
Previous research has not fully explored age-related changes in rocking stability.

Purpose of the Study:

To investigate the hypothesis that rhythmic motor pattern stability increases with developmental age.
To examine how age influences the stability of seated rocking movements.
To determine the effect of foot support on rocking stability across different age groups.

Main Methods:

Participants aged 6, 10, and 18-23 years performed a seated rocking task.
Rocking movements were recorded using a force platform to measure center of pressure.
The task was performed with and without foot support to assess environmental influences.

Main Results:

An age-related decrease in rocking frequency and cycle period variability was observed.
Stability of rocking dynamics, measured by phase angle variability, increased with age.
Foot support reduced stability and variability in children, but not in adults.

Conclusions:

Developmental age is associated with enhanced stability of rhythmic motor patterns.
Motor pattern stability can adapt to altered environmental conditions with age.
Findings suggest maturation of motor control systems underlies increased stability.