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Parameterised design of robust point-to-point fast motion controller

Parameterised design of robust point-to-point fast motion controller

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A dual-parameter design of expanded proximate time-optimal controller is proposed for fast point-to-point motion in typical electromechanical servo systems with a damping element. The controller initially resorts to a saturated control signal for the fastest acceleration or braking if possible and then seamlessly gives way to a linear control strategy once the motion slows down. The damping ratio and natural frequency of the linear control law are chosen as the design parameters to allow for a better tuning of the control performance. An extended-state observer is also included for simultaneous estimation of system speed and disturbance. Experimental verification is conducted on a DC motor position servo system using a TMS320F28335 board, and the effectiveness of the proposed design is demonstrated.

References

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      • 1. Cheng, G., Huang, Y.: ‘Disturbance-rejection composite nonlinear control applied to two-inertia servo drive system’, Control Theory Appl., 2014, 31, (11), pp. 15391547.
    2. 2)
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      • 4. Workman, M.L.: ‘Adaptive proximate time optimal servomechanisms’. PhD. Dissertation, Stanford University, 1987.
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