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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...

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.

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Related Experiment Video

Updated: May 29, 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

Real-time stability measurement system for postural control.

Alpha Agape Gopalai¹, S M N Arosha Senanayake, Loo Chu Kiong

¹School of Engineering, Monash University Sunway campus, 2, Jalan Lagoon Selatan, 46150 Bandar Sunway, Selangor, Malaysia. alpha.agape@ieee.org

Journal of Bodywork and Movement Therapies

|September 28, 2011

Summary

This summary is machine-generated.

This study introduces a new force-sensing platform to measure body sway and assess postural control. The device effectively quantifies balance changes in both static and dynamic conditions.

More Related Videos

Experimental Methods to Study Human Postural Control

Experimental Methods to Study Human Postural Control

Published on: September 11, 2019

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Last Updated: May 29, 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

Experimental Methods to Study Human Postural Control

Experimental Methods to Study Human Postural Control

Published on: September 11, 2019

Area of Science:

Biomechanics
Sensor Technology
Human Movement Analysis

Background:

Postural control is crucial for maintaining balance.
Assessing balance requires sensitive and quantitative methods.
Existing methods may not capture dynamic postural perturbations effectively.

Purpose of the Study:

To develop and validate a force-sensing platform for balance assessment.
To quantify postural control in individuals under various conditions.
To establish the feasibility of using this platform for testing postural control.

Main Methods:

Implementation of a force-sensing platform using force sensing resistors.
Measurement of destabilized postural perturbations in static and dynamic conditions.
Quantification of postural control via weighted center of pressure distribution over time.

Main Results:

The platform provided real-time qualitative and quantitative assessment of postural control.
Body sway was effectively gauged across different conditions (e.g., eye open/closed, static/dynamic).
The system demonstrated sensitivity to changes in postural control.

Conclusions:

The developed force-sensing platform is feasible for assessing and gauging individual postural control.
The platform can differentiate balance performance under varying sensory and environmental conditions.
This technology offers a valuable tool for research and clinical applications in balance evaluation.