Design and Evaluation of a Magnetorheological Damper Based Prosthetic Knee


1 Production Engineering Department, College of Engineering, Defence University, Bishoftu, Ethiopia

2 Mechanical Engineering Department, Indian Institute of Technology Madras, Chennai, India


In this work, a magnetorheological (MR) damper based above-knee prosthesis is design and evaluated based on its performance in swing phase and in stance phase. Initially, a dynamic system model for swing phase of a prosthetic leg incorporating a single-axis knee with ideal MR damper was built. The dynamic properties of the damper are represented with Bingham parametric model. From Bingham model, governing damper parameters that determine the damping force and piston displacement of the damper are identified and optimized so as to enable the single-axis knee to nearly mimick the natural swing phase trajectory of a healthy person for level-ground walking as obtained from experimental data. Then, with the optimal damper parameters, an MR damper valve constrained in a desired cylindrical volume is developed. Finally, the prosthetic knee with the MR damper is evaluated for its performance during stance phase, based on ISO standard loading condition for the intended application. The results show that, compare to Rheo knee®, the MR damper based prosthetic knee has achieved up to 68% reduction by volume and 40% reduction by weight.


1.     Gudmundsson, K.H., Jonsdottir, F., and Thorsteinsson, F., “A geometrical optimization of a magneto-rheological rotary brake in a prosthetic knee”, Smart Materials and Structures,  Vol. 19, No. 3, (2010), 035023–035033.

2.     Seid, S., Sujatha, S., and Chandramohan, S., “Design of controller for single axis knee using hydraulic damper”, In IEEE AFRICON 2015 Conference , IEEE, (2015), 1–5.

3.     Akdogan, K.E., Yilmaz, A., Sadeghimorad, A., and Sahin, I., “Design of semi active knee joint with magnetorheological (MR) damper”, In 20th Signal Processing and Communications Applications Conference (SIU), IEEE, (2012), 1–4.

4.     Zhu, X., Jing, X., and Cheng, L., “Magnetorheological fluid dampers: A review on structure design and analysis”, Journal of Intelligent Material Systems and Structures,  Vol. 23, No. 8, (2012), 839–873.

5.     Nguyen, Q.-H., and Choi, S.-B., “Optimal Design Methodology of Magnetorheological Fluid Based Mechanisms”, In Smart Actuation and Sensing Systems - Recent Advances and Future Challenges, InTech, (2012).

6.     Djavareshkian, M.H., Esmaeili, A., and Safarzadeh, H., “Optimal Design of Magnetorheological Fluid Damper Based on Response Surface Method”, International Journal of Engineering - Transactions C: Aspects,  Vol. 28, No. 9, (2015), 1359–1367.

7.     Amiri, A., Saeedi, N., Fakhari, M., and Shabani, R., “Size-dependent Vibration and Instability of Magneto-electro-elastic Nano-scale Pipes Containing an Internal Flow with Slip Boundary Condition”, International Journal of Engineering - Transactions A: Basics,  Vol. 29, No. 7, (2016), 995–1004.

8.     Seid, S., Sujatha, S., and Chandramohan, S., “Performance Evaluation of Magnetorheological Damper Valve Configurations Using Finite Element Method”, International Journal of Engineering - Transactions B: Applications ,  Vol. 30, No. 2, (2017), 303–310.

9.     Radcliffe, C.W., “The Knud Jansen Lecture: Above-knee prosthetics”, Prosthetics and Orthotics International ,  Vol. 1, No. 3, (1977), 146–160.

10.   Seid, S., Sujatha, S., and Chandramohan, S., Design and Evaluation of Swing Phase Controllers for Single-axis Knee, ", International Journal Bioautomation, Vol. 20, No. 3, (2016), 373-388.

11.   Spencer, B.F., Dyke, S.J., Sain, M.K., and Carlson, J.D., “Phenomenological Model for Magnetorheological Dampers”, Journal of Engineering Mechanics,  Vol. 123, No. 3, (1997), 230–238.

12.   Winter, D.A., The biomechanics and motor control of human gait : normal, elderly and pathological, (4th Edition), Wiley, (2005).

13.   Seid, S., Chandramohan, S., and Sujatha, S., “Optimal design of an MR damper valve for prosthetic knee application”, Journal of Mechanical Science and Technology,  Vol. 32, No. 6, (2018), 2959–2965.

14.   Jolly, M.R., Bender, J.W., and Carlson, J.D., “Properties and applications of commercial magnetorheological fluids”, In 5th Annual International Symposium on Smart Structures and Materials, International Society for Optics and Photonics, (1998), 262–275.

15.   Nguyen, Q.H., Nguyen, N.D., and Choi, S.B., “Optimal design and performance evaluation of a flow-mode MR damper for front-loaded washing machines”, Asia Pacific Journal on Computational Engineering,  Vol. 1, No. 3, (2014), 1–14.

16.   ISO 10328:2006 E, “International Standard: Technical Report”;, ISO, (2006).