Watcharapong Khovidhungij

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OBJECTIVE To correctly measure the knee joint angle, this study utilized a Qualisys motion capture system and also used it as the reference to assess the validity of the study's Inertial Measurement Unit (IMU) system that consisted of four IMU sensors and the Knee Angle Recorder software. The validity was evaluated by the root mean square (RMS) of different(More)
This work presents a boundary controller design for exponentially stabilizing Timoshenko beams with clamped end or pinned end. The beam is slender and has a small amount of Kelvin-Voigt damping. We apply the backstepping technique to design a state-feedback controller using actuation only at the beam base. The controller requires the solution of a linear(More)
We present a controller design based on the immersion and invariance method for an active suspension system, and compare the result with a backstepping control law. Simulation results show that the immersion and invariance controller can stabilize the full-order system as well as the backstepping controller in the nominal case, but is more robust to some(More)
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