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Related Concept Videos

Fault Types01:18

Fault Types

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When analyzing a single line-to-ground fault from phase A to ground at a three-phase bus, it is important to consider the fault impedance. This impedance is zero for a bolted fault, equal to the arc impedance for an arcing fault, and represents the total fault impedance for a transmission-line insulator flashover. To derive sequence and phase currents, fault conditions are translated from the phase domain to the sequence domain.
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In an open-loop system, such as a basic thermostat, the poles of the transfer function influence the system's response but do not determine its stability. However, when feedback is introduced to form a closed-loop system, such as an advanced thermostat that adjusts heating based on room temperature, stability is governed by the new poles of the closed-loop transfer function.
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Distributed Loads: Problem Solving01:21

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Beams are structural elements commonly employed in engineering applications requiring different load-carrying capacities. The first step in analyzing a beam under a distributed load is to simplify the problem by dividing the load into smaller regions, which allows one to consider each region separately and calculate the magnitude of the equivalent resultant load acting on each portion of the beam. The magnitude of the equivalent resultant load for each region can be determined by calculating...
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Feedback control systems are categorized in various ways based on their design, analysis, and signal types.
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In mechanical engineering, one-degree-of-freedom systems form the basis of a wide range of electrical and mechanical components. Using these models, engineers can predict the behavior of various parts in a larger system, which gives them insight into how different forces interact with each other.
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Related Experiment Video

Updated: Jun 6, 2025

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator
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Event-triggered fault-tolerant tracking control for multiagent systems under actuator/sensor faults.

Zhengyu Ye1, Ziquan Yu1, Bin Jiang1

  • 1College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.

ISA Transactions
|November 28, 2024
PubMed
Summary

This study introduces an event-triggered fault-tolerant tracking control (FTTC) protocol to ensure reliable estimation and stability in multiagent systems (MASs) despite sensor faults. The method enhances system performance and reduces communication load.

Keywords:
Actuator and sensor faultEvent-triggered schemeFault estimationLeader-following controlMultiagent systems

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Area of Science:

  • Control Systems Engineering
  • Robotics
  • Fault Diagnosis and Fault Tolerance

Background:

  • Sensor faults in multiagent systems (MASs) compromise measurement reliability and system stability.
  • Existing methods may not adequately address simultaneous state estimation and fault diagnosis under communication constraints.

Purpose of the Study:

  • To develop an event-triggered fault-tolerant tracking control (FTTC) protocol for MASs.
  • To ensure reliable state estimation and system stability in the presence of sensor and actuator faults.

Main Methods:

  • Utilized the descriptor approach to reformulate the system and eliminate sensor fault effects.
  • Designed a sliding-mode observer for simultaneous state estimation and fault diagnosis (FD).
  • Developed an event-triggered distributed estimator to minimize communication overhead and estimate leader states.

Main Results:

  • The proposed FTTC protocol ensures system stability under actuator and sensor faults.
  • The event-triggered mechanism effectively reduces communication load while maintaining estimation accuracy.
  • Simultaneous state estimation and fault diagnosis were achieved.

Conclusions:

  • The developed FTTC protocol offers a robust solution for MASs facing sensor faults.
  • The event-triggered strategy enhances efficiency and reliability in distributed control systems.
  • Validated through a multi-quadrotor simulation, demonstrating practical applicability.