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. Author manuscript; available in PMC: 2012 Mar 15.
Published in final edited form as: J Biomech. 2011 Feb 18;44(5):789–793. doi: 10.1016/j.jbiomech.2011.01.030

Figure 2.

Figure 2

The robotic hip exoskeleton uses the signal from the footswitch to detect heel strike. Based on the average stride time, a 10V control signal is sent to the pressure regulators during the specified portion of the stride cycle. As air pressure increases, the pneumatic cylinder shortens to assist with hip flexion.