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PD Controller: Design01:26

PD Controller: Design

In automotive engineering, car suspension systems often employ Proportional Derivative (PD) controllers to enhance performance. PD controllers are utilized to adjust the damping force in response to road conditions. A controller, acting as an amplifier with a constant gain, demonstrates proportional control, with output directly mirroring input.
Designing a continuous-data controller requires selecting and linking components like adders and integrators, which are fundamental in Proportional,...

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Related Experiment Video

Updated: Jul 13, 2026

Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators
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Design and dynamic evaluation for a linear ultrasonic stage using the thin-disc structure actuator.

Fuhliang Wen1, C-Y Yen

  • 1Department of Mechanical and Computer-Aided Engineering, Graduate School of Automation and Mechatronics, St. John's University, 499 Sec. 4 Tam King Road, Tamsui, Taipei 25135, Taiwan. ericwen@mail.sju.edu.tw

Ultrasonics
|August 19, 2007
PubMed
Summary

A new single-axis ultrasonic actuating stage offers precise positioning and high performance. Its simple, cost-effective design utilizes an ultrasonic actuator and neural-fuzzy control for flexible applications.

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Area of Science:

  • Mechanical Engineering
  • Control Systems
  • Robotics

Background:

  • Traditional positioning systems often face limitations in precision, speed, or cost.
  • Developing novel actuation mechanisms is crucial for advancing precision engineering.

Purpose of the Study:

  • To propose and design a novel single-axis ultrasonic actuating stage.
  • To achieve stable and precise positioning control for the stage.
  • To demonstrate the flexibility and cost-effectiveness of the ultrasonic actuation concept.

Main Methods:

  • The stage incorporates a movable plate, an edge-driving ultrasonic actuator, and a magnetic encoder.
  • A friction-contact mechanism is employed for long-distance movement.
  • A neural-fuzzy controller is utilized for precise positioning control.

Main Results:

  • The proposed stage exhibits high actuating and braking capabilities.
  • Stable and precise positioning control was successfully achieved.
  • The design facilitates long-distance movement via ultrasonic actuation.

Conclusions:

  • The novel single-axis ultrasonic actuating stage offers a simple and inexpensive solution.
  • The mechanical design concept is flexible and adaptable for various applications.
  • Ultrasonic actuation presents a viable approach for precise motion control systems.