Conceptual Design and Characterization of Contractile Water Jet Thruster Using IPMC Actuator

This paper presents the design, development and characterization of contractile water jet thruster (CWJT) for mini underwater robot. Instead of electric motor, this CWJT utilizes the Ionic Polymer Metal Composite (IPMC) as the actuator to generate the water jet. The main focus of this paper is to analyze the conceptual design of the proposed CWJT which would determine the thrust force value, jet flow behavior and actuator’s stress. Those thrust force and jet flow studies were carried out using Matlab/Simscape simulation software. The actuator stress had been analyzed using COSMOS simulation software. The results showed that there was no significant change for jet velocity at variable cross sectional nozzle area. However, a significant change was detected for jet velocity at different nozzle cross sectional area ratio which was up to 37%. The generated thrust force has proportional relation to the nozzle cross sectional area.

• Muhammad Farid Shaari
• Zahurin Samad

• Contractile water jet thruster
• IPMC actuator
• Thrust force.

<p>[1] M.F.Shaari, Z. Samad, M.E.Abu Bakar and M. Jaafar,”Design
Consideration of Bio-Inspired Water Jet Propulsor for Mini Autonomous
Underwater Robot”, Advanced Materials Research, vol. 463-464, 2012,
pp 1583-1588.
[2] A. P. Thomas, M. Milano, M. G. G. Sell, K. Fischer, and J. Burdick:
Synthetic Jet Propulsion for Small Underwater Vehicles, IEEE Int. Conf.
of Robotics and Automation, 2005, pp. 181-187.
[3] M.Krieg and K.Mohseni, “ Dynamic Modelling and Control of
Biologically Inspired Vortex Ring Thrusters for Underwater Robot
Locomotion”, IEEE Trancsactions on Robotics, 2010, pp 1-13.
[4] S. Xu, B. Liu and L. Hao, “A Small Remote Operated Robotic Fish
Actuated by IPMC”, Proceedings of the IEEE International Conference
on Robotics and Biomimetics, 2009, pp 1152-1156.
[5] E. Stemme and G. Stemme, “A Valveless Diffuse/Nozzle-based Pump”,
Sensors and Actuators A, vol. 39, 1993, pp.159-167.
[6] Z. Chen, S. Shatara and X. Tan, “Modelling of Biomimetic Robotic Fish
Propelled by an Ionic Polymer-Metal Composite Caudal Fin”,
IEEE/ASME Transactions on Mechatronics, vol.15, no.3, 2010, pp 448-
458.</p>