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• W2897850364 abstract "Walking and push recovery controllers for humanoid robots have advanced throughout the years while unsolved gaps leading to undesirable behaviours still exist. Because previous studies are mainly pure engineering methods, while the use of data-driven methods has made impressive achievements in the field of control, we set motivation for exploration of control laws applied by human beings. Successful findings may help fill the gaps in current engineering-based controllers and can potentially improve the performance. In this thesis, we show our complete design and implementation of a set of experiments to collect and process human data, as well as data analysis for model fitting. Using the processed motion data and force data collected, we export the position, velocity and acceleration of our participants' centres of mass to form a one-dimensional point mass model defined by the direction of pushes. As a result, we find that proportional-derivative (PD) control can describe the underlying control law that people used and different PD gains are set for different phases of a push recovery trial within the scope of our study. Our final PD control fittings have an average root mean square error below 0.1m with above 90% of a trial's data points are taken into account on average. We also explore how different error metrics that the PD control model uses influence its performance but neither of the two metrics we proposed can help improve the performance. Finally, we have statistics on how people switch push recovery strategies based on their centre of mass properties at the start of the push. We find that the further the centre of mass is from the steady-state point and the higher the velocity it has, a person is more likely to make a step for push force compensation." @default.
• W2897850364 created "2018-10-26" @default.
• W2897850364 creator A5004415162 @default.
• W2897850364 date "2018-10-22" @default.
• W2897850364 modified "2023-09-27" @default.
• W2897850364 title "Study of Human Push Recovery." @default.
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• W2897850364 hasPublicationYear "2018" @default.
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