Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Transient and Steady-state Response01:24

Transient and Steady-state Response

In control systems, test signals are essential for evaluating performance under various conditions. The ramp function is effective for systems undergoing gradual changes, while the step function is suitable for assessing systems facing sudden disturbances. For systems subjected to shock inputs, the impulse function is the most appropriate test signal.
These test signals are integral in designing control systems to exhibit two key performance aspects: transient response and steady-state response.
Time and frequency -Domain Interpretation of Phase-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

Phase-lead controllers are commonly used in various control systems to enhance response speed and stability. Adjusting the brightness on a television screen offers a practical example of phase-lead control. When contrast is enhanced, a phase-lead controller is employed. Mathematically, phase-lead control is identified when the first parameter is smaller than the second.
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
Time-Domain Interpretation of PD Control01:07

Time-Domain Interpretation of PD Control

Proportional-Derivative (PD) control is a widely used control method in various engineering systems to enhance stability and performance. In a system with only proportional control, common issues include high maximum overshoot and oscillation, observed in both the error signal and its rate of change. This behavior can be divided into three distinct phases: initial overshoot, subsequent undershoot, and gradual stabilization.
Consider the example of control of motor torque. Initially, a positive...
Time and frequency -Domain Interpretation of Phase-lag Control01:21

Time and frequency -Domain Interpretation of Phase-lag Control

Phase-lag controllers are widely used in control systems to improve stability and reduce steady-state errors. A dimmer switch controlling the brightness of a light bulb serves as a practical example of phase-lag control, gradually adjusting the bulb's brightness. Mathematically, phase-lag control or low-pass filtering is represented when the factor 'a' is less than 1.
Phase-lag controllers do not place a pole at zero, but instead influence the steady-state error by amplifying any finite,...
Phase-lead and Phase-lag Controllers01:22

Phase-lead and Phase-lag Controllers

Understanding the working function of different types of controllers can be illustrated with practical analogies, such as adjusting a stereo's volume equalizer. Cranking up the bass involves a phase-lead controller, which functions as a high-pass filter, while increasing the treble uses a phase-lag controller, which acts as a low-pass filter. PD controllers, similar to high-pass filters, enhance the system's response to high-frequency components. PI controllers, akin to low-pass filters, manage...
Timing and Consequences on Behavior01:08

Timing and Consequences on Behavior

In operant conditioning, the timing of reinforcement is crucial. For animals like rats and cats, immediate reinforcement (within a few seconds) is much more effective than delayed reinforcement. For example, a food reward for a rat needs to follow within 30 seconds of pressing a bar to be effective. 
Humans, however, can respond to delayed reinforcers. We often make decisions between immediate small rewards and delayed larger rewards. This ability to delay gratification is a significant factor...

You might also read

Related Articles

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

Sort by
Same author

Stability of two-dimensional potential flows using bicomplex numbers.

Proceedings. Mathematical, physical, and engineering sciences·2022
Same author

Renoprotective effects of prazosin on ischemia-reperfusion injury in rats.

Human & experimental toxicology·2021
Same author

Strategies for improving the emission performance of hybrid electric vehicles.

The Science of the total environment·2021
Same author

The irradiated fuel-burnup experiment of Tehran Research Reactor using nondestructive gamma-ray spectroscopy.

Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine·2020
Same author

Adenosine deaminase inhibition.

International journal of biological macromolecules·2019
Same author

An efficient method for detecting damaged FAs; burnup and PPF estimations by gamma spectroscopy.

Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine·2018
Same journal

Inverse FIP effect plasma in the solar atmosphere: a synthesis of current understanding and new insights from AR 11967.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2026
Same journal

Signs of sulfur fractionation under high magnetic field strength.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2026
Same journal

First ionization potential fractionation of sulfur observed with spectral imaging of the coronal environment.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2026
Same journal

Chromospheric dynamics and turbulence regulate the solar FIP effect.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2026
Same journal

Exploring the link between wave activity in the photospheric velocity driver and the FIP bias in the solar corona.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2026
Same journal

Radiative hydrodynamic simulations of first ionization potential fractionation in solar flares.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2026
See all related articles

Related Experiment Video

Updated: Jun 3, 2026

Measuring Delay Discounting in Humans Using an Adjusting Amount Task
07:47

Measuring Delay Discounting in Humans Using an Adjusting Amount Task

Published on: January 9, 2016

Transition delay using control theory.

S Bagheri1, D S Henningson

  • 1Linné Flow Centre, Department of Mechanics, KTH, 100 44, Stockholm, Sweden.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|March 9, 2011
PubMed
Summary
This summary is machine-generated.

Researchers are using feedback control to delay laminar-turbulent transition in fluid flows. This approach focuses on reducing disturbance growth in boundary layers through advanced control strategies and modeling.

More Related Videos

The 5-Choice Serial Reaction Time Task: A Task of Attention and Impulse Control for Rodents
09:43

The 5-Choice Serial Reaction Time Task: A Task of Attention and Impulse Control for Rodents

Published on: August 10, 2014

Related Experiment Videos

Last Updated: Jun 3, 2026

Measuring Delay Discounting in Humans Using an Adjusting Amount Task
07:47

Measuring Delay Discounting in Humans Using an Adjusting Amount Task

Published on: January 9, 2016

The 5-Choice Serial Reaction Time Task: A Task of Attention and Impulse Control for Rodents
09:43

The 5-Choice Serial Reaction Time Task: A Task of Attention and Impulse Control for Rodents

Published on: August 10, 2014

Area of Science:

  • Fluid dynamics
  • Control theory
  • Aerodynamics

Background:

  • Laminar-turbulent transition in wall-bounded shear flows is a critical phenomenon affecting drag and heat transfer.
  • Traditional methods for controlling this transition are often limited in effectiveness and applicability.
  • Recent advancements necessitate a review of feedback control strategies for transition delay.

Purpose of the Study:

  • To review recent research on feedback control for delaying laminar-turbulent transition.
  • To highlight the progression from simple to complex flow configurations.
  • To discuss challenges and experimental advances in this field.

Main Methods:

  • Focus on linear control approaches applied to reduce small-amplitude disturbances.
  • Utilizes numerical simulations of boundary layer development.
  • Incorporates low-dimensional models derived from the Navier-Stokes equations.

Main Results:

  • Demonstrates the successful application of control theory to delay transition.
  • Shows the evolution of control strategies from 2D to 3D, spatially inhomogeneous flows.
  • Highlights the role of reduced-order models in advancing control techniques.

Conclusions:

  • Feedback control is a promising strategy for managing laminar-turbulent transition.
  • Further research is needed to address current challenges and integrate experimental findings.
  • The field benefits from interdisciplinary collaboration between fluid mechanics and control engineering.