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Updated: Jul 13, 2026

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A Sensaptic ADAS Device Using Shape Memory Alloy Wires: Design and Control.

Deivamoney Josephine Selvarani Ruth1, Kaliaperumal Dhanalakshmi2, Seung-Bok Choi3

  • 1Robert Bosch Centre for Cyber Physical System, Indian Institute of Science, Bangalore 560012, India.

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Summary

This study introduces Sensaptics, an active accelerator pedal using shape memory alloy (SMA) for precise speed control and driver haptic feedback. The system shows promising results in real-time diesel engine tests.

Keywords:
common rail systemhapticspedal position sensingsensapticsshape memory alloy (SMA)synergistic

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Area of Science:

  • Automotive Engineering
  • Mechatronics
  • Materials Science

Background:

  • Traditional accelerator pedals lack advanced feedback mechanisms.
  • Electronic throttle control requires precise pedal position sensing.
  • Integrating sensing and actuation can enhance vehicle control and driver interaction.

Purpose of the Study:

  • To develop an active accelerator pedal system using shape memory alloy (SMA).
  • To enable precise vehicle speed control and provide haptic feedback to the driver.
  • To create a synergistic sensor-actuator device for enhanced automotive applications.

Main Methods:

  • Development of a novel device, Sensaptics, utilizing bi-functional SMA wires.
  • Configuration of SMA wires as both a pedal position sensor and a variable impedance actuator.
  • Integration and testing within a real-time common rail diesel system for performance evaluation.

Main Results:

  • Sensaptics successfully functioned as both an active sensor for pedal positioning and an actuator for haptic feedback.
  • The system demonstrated promising performance in controlling rail pressure and preventing over-speeding.
  • The integrated design proved effective in alerting drivers and facilitating appropriate control actions.

Conclusions:

  • The active accelerator pedal system based on SMA is a viable proof-of-concept.
  • The Sensaptics device offers a novel approach to vehicle speed control and driver feedback.
  • Further development could lead to enhanced automotive safety and driver experience.