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A large number of transfemoral amputees living in low-income countries could not access a much-needed prosthesis. Hence, affordable semi-active prosthetic knees have been designed in recent years. As the swing phase of the gait cycle is unstable as compared to the stance phase, these designs could not perfectly mimic this phase of a healthy human being. In contribution toward such a gap, this study proposes the modeling and design of a robust controller for magnetorheological (MR) damper-baseddoi:10.3389/frobt.2022.870018 pmid:35663619 pmcid:PMC9160523 fatcat:e2yml5y4mnakvivhbedijbskt4