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This paper presents a simple optoelectrokinetic method for manipulating particles by simultaneously inducing electrohydrodnamic flow and electrokinetic motion. With carefully tuning the balance between several forces acting on particles, multiple manipulation capabilities including aggregation, translation, sorting, and patterning were achieved. In combination with bead-based immunoassays, we successfully...
This paper proposes a velocity control approach for the light electric bike with human power and disturbance estimation. The implementation of the disturbance observer in both the open-loop and closed-loop is tuned in terms of the dc gain of a Q-filter. The torque control law assumes that the slow varying part of disturbance has been successfully estimated and compensated, and is obtained from optimal...
Torque ripple generated in the commutation interval is one of the main drawbacks of Brushless DC (BLDC) motors. This paper presents an comprehensive analysis on the generated torque ripples of trapezoidal back-EMF due to phase commutation in the six switch, three-phase inverter brushless dc motor drives. Experimental results verify the amplitude of the torque ripple under 4 kinds of PWM pattern, respectively.
A hybrid multiplexing holographic velocimetry used for characterizing three-dimensional, three-component (3D–3C) flow behaviors in microscale devices was designed and tested in this paper. Derived from the concept of holographic particle image velocimetry (HPIV), a new experimental facility was realized by integrating a holographic technique with a state-of-the-art multiplexing operation based on...
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