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In this paper, we propose torque-modulated backstepping control for uniform tracking errors in the vertical motion of two-dimensional electromagnetic scanners using only output measurement. Due to manufacturing tolerance, there are parameter uncertainties of two-dimensional electromagnetic scanners so that it is not easy to obtain uniform tracking error performance for the motion control of scanners...
In this paper, we present an observer based nonlinear controller using barrier Lyapunov function (BLF) for position tracking of Sawyer motor under yaw constraint. The dynamics of Sawyer motor is modified to apply BLF-based backstepping control design. To relax the matching condition, torque and force modulations are proposed. The modulations enable decoupling forces and torque of the Sawyer motor,...
We innovate an approach to position control, a robust nonlinear damping backstepping with augmented observer for position control of permanent magnet stepper motors (PMSMs). The proposed method requires only position feedback and nominal value of Km over JL among PMSM parameters. We propose new 3rd order single-input single-output PMSM dynamics that consist of position, velocity, and acceleration...
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