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. Author manuscript; available in PMC: 2021 Dec 1.
Published in final edited form as: Med Eng Phys. 2020 Oct 15;86:47–56. doi: 10.1016/j.medengphy.2020.10.010

Figure 3:

Figure 3:

Controller operation. Blue trace shows typical profile of changes in trunk angle over time with the main control performance parameters indicated. A state variable keeps information on status of phase of motion.