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Related Concept Videos

PID Controller01:19

PID Controller

Proportional-Integral-Derivative (PID) controllers are widely used in various control systems to enhance stability and performance. In a thermostat, it adjusts heating or cooling based on the temperature difference between the actual and desired levels. They are often used in automotive speed systems, effectively managing sudden speed changes while maintaining a constant speed under varying conditions. On the other hand, PI controllers, commonly employed in voltage regulation, enhance stability...
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Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator
06:45

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Published on: October 28, 2022

GA-optimized feedforward-PID tracking control for a rugged electrohydraulic system design.

B K Sarkar1, P Mandal, R Saha

  • 1Department of Mechanical Engineering, Jadavpur University, Kolkata 700032, India.

ISA Transactions
|August 6, 2013
PubMed
Summary
This summary is machine-generated.

This study developed a feedforward controller for rugged electrohydraulic systems, improving performance to match servosystems while maintaining ease of maintenance. The controller compensates for nonlinearities and unmodeled effects, validated by real-time responses.

Keywords:
DeadbandFrictionReal-time control

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Area of Science:

  • Control Engineering
  • Mechanical Systems
  • Robotics

Background:

  • Rugged electrohydraulic systems offer easier maintenance for remote/harsh applications compared to delicate servosystems.
  • However, rugged systems suffer from performance limitations like low bandwidth, valve nonlinearities, and cylinder friction.
  • Existing servosystems provide high performance but are complex and difficult to maintain.

Purpose of the Study:

  • To design a feedforward controller for rugged electrohydraulic systems.
  • To compensate for inherent nonlinearities in valves and cylinders.
  • To achieve servosystem-comparable performance in an easily maintainable system.

Main Methods:

  • A feedforward control strategy was designed to counteract system nonlinearities.
  • Proportional-Integral-Derivative (PID) feedback was implemented for piston displacement to manage unmodeled dynamics.
  • A real-coded genetic algorithm was utilized for optimizing controller parameters.

Main Results:

  • The designed controller effectively compensated for nonlinearities in the electrohydraulic system.
  • Real-time step and sinusoidal responses demonstrated performance comparable to modern servosystems.
  • The system achieved high performance without sacrificing ease of maintenance.

Conclusions:

  • The developed feedforward controller successfully enhances rugged electrohydraulic systems.
  • This approach offers a viable solution for high-performance, low-maintenance applications.
  • The controller design is acceptable and validated by experimental results.