Development of an EAP mechanism with precision and control capabilities
Research Opportunities
Summary
Polymers such as Electroactive polymers (EAPs) can change shape and/or dimensions in response to an applied electric field. Generally, EAPs are categorized into ionic and electronic types. Ionic EAPs are stimulated through electrical activation by migration of ions or solvents and examples include Conducting Polymers (CPs) and Ionic Polymer-Metallic Composites (IPMCs). Examples of electronic EAPs include dielectric elastomers, electrostrictive polymers, liquid crystal polymers and piezoelectric polymers which are activated through electric fields and coulomb forces. EAPs have garnered significant interest through applications of soft actuators in robotics specially as artificial muscles. EAPs have also found applications as sensors to measure blood pressure, pulse rate monitoring and chemical sensing etc.
There are number of challenges in precisely sensing and controlling systems and mechanisms with EAP actuators and sensors. Specially two identical EAP actuators/sensors or mechanisms which are fabricated using identical process can have remarkably different behaviours. Additionally, the behaviour of a single EAP actuator/sensor can vary over time due to aging and degradation from repeated usage. Similarly, custom nonstandard EAP mechanisms can exhibit complex nonlinearities that hinder precise sensing and control. The afore mentioned issues are some of the challenges to be overcome before significant applications are developed in the field of robotics.
The aim of this research is to systematically develop an Electroactive Polymer system/mechanism with predictable characteristics and precision self-sensing/soft-sensing and control capabilities.
The key objectives of the proposed research problem can be given as:
- Investigate Electroactive polymers and other stimuli-responsive polymers suitable for the purpose of self-sensing/soft-sensing and control applications.
- Design and standardise a soft robotic benchmark system/mechanism to investigate the proposed fundamental issues.
- Characterise material properties to support sensing and control capabilities of the proposed benchmark system/mechanism.
- Determine, design and develop a suitable self-sensing/soft-sensing technique which can be fabricated/incorporated into the system/mechanism to measure the proposed state and physical quantity for control.
- Investigate modelling and control (model based & model free) techniques to perform precision control for position or force tracking, locomotion etc.
- Perform validation and consolidation of self-sensing and control characteristics through experimentation on the developed EAP benchmark mechanism.
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Normal entry requirements are a first or upper second class honours degree from a University of the United Kingdom, or from an overseas University, or degree equivalent qualification, subject to the approval of Robert Gordon University.
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For Academic Year 2024/2025
UK/EU Students
- Full time - £4,786 per academic year
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For Academic Year 2023/2024
UK/EU Students
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Our Research degrees usually start in February and October each year. There are no formal deadlines for you to submit your application, though we recommend you submit it as early as possible in order to ensure we can help you join us at your preferred time.
Completed application forms should be accompanied by:
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- A short research proposal, in the range of 1,500 - 3,000 words, containing a rationale and background, study aims and objectives, a literature review, proposed research methods and a full reference list.
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