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Updated: Jun 2, 2026
08:47
Rapid Manufacturing of Thin Soft Pneumatic Actuators and Robots
Published on: November 8, 2019
A New Type of Motor: Pneumatic Step Motor.
Dan Stoianovici1, Alexandru Patriciu, Doru Petrisor
1The URobotics Laboratory, Johns Hopkins University School of Medicine, Baltimore, MD 21224 USA.
IEEE/ASME Transactions on Mechatronics : a Joint Publication of the IEEE Industrial Electronics Society and the ASME Dynamic Systems and Control Division
|April 30, 2011
Summary
A novel pneumatic step motor (PneuStep) offers precise, controllable motion for medical robotics. This electricity-free motor utilizes nonmagnetic materials and fiber optic encoding for safe operation in MRI environments.
Area of Science:
- Robotics
- Mechanical Engineering
- Biomedical Engineering
Background:
- Pneumatic motors offer advantages in specific environments but often lack precise control.
- Existing solutions may not be suitable for sensitive applications like medical imaging.
Purpose of the Study:
- To introduce a new pneumatic step motor (PneuStep) designed for precise motion control.
- To develop an electricity-free actuation system compatible with medical imaging equipment.
Main Methods:
- Sequential pressurization of motor ports to achieve discrete rotary motion.
- Integration of a gearhead and incremental position encoder in a compact design.
- Development of a specialized electronic driver for stepper control and feedback integration.
Main Results:
- The PneuStep motor demonstrates easily controllable, precise motion.
- Speed performance is affected by pneumatic hose length, with experimental data provided.
- The motor is constructed from nonmagnetic and dielectric materials, utilizing fiber optics for encoding.
Conclusions:
- PneuStep provides a viable solution for precise motion actuation in sensitive environments, particularly medical applications.
- The electricity-free design and nonmagnetic materials ensure compatibility with MRI.
- The technology is adaptable for various pneumatic or hydraulic precision-motion applications.
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