Optimization of bio-inspired multi-segment IPMC cilia

Sareh, S.; Conn, A. T.; Rossiter, J. M.; Ieropoulos, I.; Walters, P.

Abstract

In nature, unidirectional fluid flows are often induced at micro-scales by cilia and related organelles. A controllable unidirectional flow is beneficial at these scales for a range of novel robotic and medical applications, whether the flow is used for propulsion (e.g. swimming robots) or mass transfer (e.g. prosthetic trachea). Ionic Polymer Metal Composites (IPMCs) are innovative smart materials that can be used directly as active propulsive surfaces rather than a traditional motor and propeller. IPMC actuators with two segmented electrodes that attempt to mimic the motion of cilia-like organelles have been realized. In this paper the optimization of these actuators towards producing unidirectional flows is described. A parametric study of the kinematic and hydrodynamic effect of modulating the drive signal has been conducted. As with eukaryotic cilia and flagella found in mammals, the segmented IPMC actuator can generate both flexural (asymmetric) and undulatory (symmetric) motions from the same physical structure. The motion is controlled by applying profiles of driving frequencies and phase differences. Kinematic analysis using a camera and laser displacement sensor has been used to measure and classify different motion types. The hydrodynamic forces produced by each motion type have been estimated using particle-tracking flow visualization. This allows drive signal profiles to be ranked in terms of fluid flow momentum transfer and directionality. Using the results of the parametric study, the IPMC motion is optimized towards producing unidirectional flow via repeatable cilia-inspired motion. © 2010 Copyright SPIE - The International Society for Optical Engineering.

Citation

Sareh, S., Conn, A. T., Rossiter, J. M., Ieropoulos, I., & Walters, P. (2010). Optimization of bio-inspired multi-segment IPMC cilia. Proceedings of SPIE, 7642, https://doi.org/10.1117/12.847552

• Journal Article Type: Conference Paper
• Conference Name: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring
• Conference Location: San Diego, California
• Acceptance Date: Jan 1, 2010
• Online Publication Date: Apr 9, 2010
• Publication Date: Apr 9, 2010
• Deposit Date: Dec 11, 2020
• Journal: Proceedings of SPIE - The International Society for Optical Engineering
• Print ISSN: 0277-786X
• Publisher: Society of Photo-optical Instrumentation Engineers
• Peer Reviewed: Not Peer Reviewed
• Volume: 7642
• ISBN: 9780819480576
• DOI: https://doi.org/10.1117/12.847552
• Keywords: Ionic Polymer Metal Composites (IPMCs), swimming robots, unidirectional fluid flows
• Public URL: https://uwe-repository.worktribe.com/output/6804589