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

Feedback Loops01:01

Feedback Loops

64.1K
In most cases, excessive hormone production is prevented by negative feedback—a loop that starts with a stimulus inducing the release of a particular substance, like a hormone, to maintain a certain level before triggering a signal that results in a decrease in further release of the hormone.
64.1K
Control of Eating Behavior Using a Novel Feedback System04:48

Control of Eating Behavior Using a Novel Feedback System

11.5K
Subjects eat food from a plate placed on a scale connected to a computer that records the weight loss of the plate during the meal. Feedback on the computer screen allows the subject to adapt her/his eating behavior to reference curves thus normalizing body...
11.5K
Cell Signaling Feedback Loops01:07

Cell Signaling Feedback Loops

7.3K
Positive and negative feedback loops are crucial for regulating biological signaling systems. These feedback loops are processes that connect output signals to their inputs.
Negative feedback loops
Most signaling systems have negative feedback loops that can perform different functions such as output limiter, and adaptation.
Output limiter
Upon receiving an input signal, the cellular response rapidly increases until a threshold is reached. Beyond this threshold, a negative feedback loop...
7.3K
Controlled Rotation of Human Observers in a Virtual Reality Environment09:11

Controlled Rotation of Human Observers in a Virtual Reality Environment

3.0K
The controlled physical rotation of a human observer is desirable for certain experimental, recreational, and educational applications. This paper outlines a method for converting an office swivel chair into a medium for controlled physical rotation in a virtual reality...
3.0K
Positive and Negative Feedback Loops01:18

Positive and Negative Feedback Loops

24.9K
Animal organs and organ systems constantly adjust to internal and external changes through a process called homeostasis ("steady state"). Examples of these changes include regulation of the level of glucose or calcium in the blood or internal responses to external temperatures. Homeostasis requires  maintaining an internal dynamic equilibrium:
24.9K
Online Virtual Reality Networked Control Laboratory Applied in Control Engineering Education04:15

Online Virtual Reality Networked Control Laboratory Applied in Control Engineering Education

1.6K
This study describes a WebVR-based online virtual reality (VR) laboratory system that provides users with immersive and interactive experimentation capabilities supported by VR devices. The proposed system not only helps to enhance the realism of user participation in online experiments but is also applicable to a wide range of online laboratory...
1.6K

You might also read

Related Articles

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

Sort by
Same author

Integrated Optimization of Structure and Control for Fast Steering Mirrors.

Micromachines·2024
Same author

Alpha-SGANet: A multi-attention-scale feature pyramid network combined with lightweight network based on Alpha-IoU loss.

PloS one·2022
Same author

Loss of control over mild aversive events produces significant helplessness in mice.

Behavioural brain research·2019
Same author

Characterization of an Alkaline GH49 Dextranase from Marine Bacterium <i>Arthrobacter</i> <i>oxydans</i> KQ11 and Its Application in the Preparation of Isomalto-Oligosaccharide.

Marine drugs·2019
Same author

Spin-lattice correlation in Eu<sup>3+</sup> doped antiferromagnet TmFeO<sub>3</sub>.

Physical chemistry chemical physics : PCCP·2019
Same author

Characterization and mechanism of the effects of Mg-Fe layered double hydroxide nanoparticles on a marine bacterium: new insights from genomic and transcriptional analyses.

Biotechnology for biofuels·2019

Related Experiment Video

Updated: Jan 20, 2026

Control of Eating Behavior Using a Novel Feedback System
04:48

Control of Eating Behavior Using a Novel Feedback System

Published on: May 8, 2018

11.5K

Virtual Dual-Loop Feedback Control with Model-Construction Linear Extended State Observer for Free Space Optical

Kang Nie1,2,3, Wei Ren4,5,6, Xi Zhou7,8,9

  • 1Key Laboratory of Optical Engineering, Chinese Academy of Sciences, Chengdu 610209, China. kangnie@outlook.com.

Sensors (Basel, Switzerland)
|September 7, 2019
PubMed
Summary

This study introduces a virtual dual-loop feedback control (VDFC) with a model-construction linear extended state observer (MCLESO) to improve disturbance suppression in free space optical communication (FSO) systems. The method enhances control accuracy and reduces costs by eliminating velocity sensors.

Keywords:
disturbance suppressionfree space optical communicationmodel-construction linear extended state observeroptoelectronic target detectortip-tilt mirrorvirtual dual-loop feedback control

More Related Videos

Hormone Production and Feedback Loops
01:01

Hormone Production and Feedback Loops

Published on: October 23, 2025

64.1K
Controlled Rotation of Human Observers in a Virtual Reality Environment
09:11

Controlled Rotation of Human Observers in a Virtual Reality Environment

Published on: April 21, 2022

3.0K

Related Experiment Videos

Last Updated: Jan 20, 2026

Control of Eating Behavior Using a Novel Feedback System
04:48

Control of Eating Behavior Using a Novel Feedback System

Published on: May 8, 2018

11.5K
Hormone Production and Feedback Loops
01:01

Hormone Production and Feedback Loops

Published on: October 23, 2025

64.1K
Controlled Rotation of Human Observers in a Virtual Reality Environment
09:11

Controlled Rotation of Human Observers in a Virtual Reality Environment

Published on: April 21, 2022

3.0K

Area of Science:

  • Optical Engineering
  • Control Systems Engineering
  • Robotics

Background:

  • Free space optical communication (FSO) systems require stable alignment, which is challenged by internal dynamics and external disturbances.
  • Fast tip-tilt mirror platforms are crucial for maintaining FSO beam stability but are susceptible to various perturbations.

Purpose of the Study:

  • To enhance the disturbance suppression ability (DSA) of fast tip-tilt mirror platforms for FSO systems.
  • To develop a control strategy that improves accuracy and reduces system complexity and cost.

Main Methods:

  • A virtual dual-loop feedback control (VDFC) strategy was developed, incorporating a novel model-construction linear extended state observer (MCLESO).
  • The MCLESO was modified to utilize system input/output data and model information for observing total disturbances (internal and external).
  • Position and velocity signals were observed using only an optoelectronic target detector and MCLESO, enabling direct controller application within the DFC system.

Main Results:

  • The proposed MCLESO-VDFC method demonstrated enhanced disturbance suppression ability (DSA) in the low and medium frequency ranges for tip-tilt mirror control.
  • The control strategy achieved more accurate performance post-model construction.
  • The system's miniaturization and cost-effectiveness were improved by eliminating the need for separate velocity sensors.

Conclusions:

  • The MCLESO-VDFC method effectively enhances the DSA of tip-tilt mirror control systems operating under disturbance conditions.
  • The approach offers a viable solution for improving FSO system stability and reliability.
  • Validation through both simulations and experiments confirms the practical effectiveness of the proposed control strategy.