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Article

A Novel Hydraulic Actuation System Utilizing Magnetorheological Fluids for Single-Port Laparoscopic Surgery Applications

Mechanical Engineering, University of Dundee, Dundee DD1 4HN, UK
Materials 2020, 13(6), 1380; https://doi.org/10.3390/ma13061380
Received: 13 February 2020 / Revised: 10 March 2020 / Accepted: 16 March 2020 / Published: 20 March 2020
Single-port laparoscopic surgery (SLS), which utilizes one major incision, can deliver favorable cosmetic outcomes with fewer patient hospitalization stays and less postoperative pain. However, current SLS instruments, which are rigid and slender, have been suffering from several drawbacks, including their inability to provide the optimum articulation required to complete certain SLS tasks. This paper reports on the development of a lightweight smart hydraulic actuation system that is proposed to be embedded at selected joints along current SLS instruments, in order to enhance their adaptability with a higher level of stiffness and degrees-of-freedom. The developed smart actuation system utilizes both conventional hydraulic and magnetorheological (MR) fluid actuation technologies. Electromagnetic finite element analyses were conducted to design the electromagnetic circuit of the smart actuator. A prototype of the developed actuation system was manufactured, and its performance was assessed using a dedicated experimental arrangement, which was found to agree well with the results obtained using a Bingham plastic theoretical model. Finally, the present design of the developed smart actuation system permits an angulation of about 90° and a maximum force output in excess of 100 N, generated under a magnetic excitation of about 1.2 Tesla, which should be sufficient to resist torques of up to 500 mNm. View Full-Text
Keywords: smart materials; magnetic-responsive materials; magnetorheological fluids; smart material actuator; smart hydraulic actuator; single-port laparoscopic surgery (SLS) smart materials; magnetic-responsive materials; magnetorheological fluids; smart material actuator; smart hydraulic actuator; single-port laparoscopic surgery (SLS)
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MDPI and ACS Style

El Wahed, A.K. A Novel Hydraulic Actuation System Utilizing Magnetorheological Fluids for Single-Port Laparoscopic Surgery Applications. Materials 2020, 13, 1380. https://doi.org/10.3390/ma13061380

AMA Style

El Wahed AK. A Novel Hydraulic Actuation System Utilizing Magnetorheological Fluids for Single-Port Laparoscopic Surgery Applications. Materials. 2020; 13(6):1380. https://doi.org/10.3390/ma13061380

Chicago/Turabian Style

El Wahed, Ali K. 2020. "A Novel Hydraulic Actuation System Utilizing Magnetorheological Fluids for Single-Port Laparoscopic Surgery Applications" Materials 13, no. 6: 1380. https://doi.org/10.3390/ma13061380

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