A Real-Time SOSM Super-Twisting Technique for a Compound DC Motor Velocity Controller
AbstractIn this paper, a real-time robust closed-loop control scheme for controlling the velocity of a Direct Current (DC) motor in a compound connection is proposed. This scheme is based on the state-feedback linearization technique combined with a second-order sliding mode algorithm, named super-twisting, for stabilizing the system and achieving control goals. The control law is designed to track a periodic square reference signal, being one of the most severe tests applied to closed-loop systems. The DC motor drives a squirrel-cage induction generator which represents the load; this generator must work above the synchronous velocity to deliver the generated power towards the grid. A classical proportional-integral (PI) controller is designed for comparison purposes of the time-domain responses with the proposed second-order sliding mode (SOSM) super-twisting controller. This robust controller uses only a velocity sensor, as is the case of the PI controller, as the time derivative of the velocity tracking variable is estimated via a robust differentiator. Therefore, the measurements of field current and stator current, the signal from a load torque observer, and machine parameters are not necessary for the controller design. The validation and robustness test of the proposed controller is carried out experimentally in a laboratory, where the closed-loop system is subject to an external disturbance and a time-varying tracking signal. This test is performed in real time using a workbench consisting of a DC motor—Alternating Current (AC) generator group, a DC/AC electronic drive, and a dSPACE 1103 controller board. View Full-Text
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Morfin, O.A.; Castañeda, C.E.; Valderrabano-Gonzalez, A.; Hernandez-Gonzalez, M.; Valenzuela, F.A. A Real-Time SOSM Super-Twisting Technique for a Compound DC Motor Velocity Controller. Energies 2017, 10, 1286.
Morfin OA, Castañeda CE, Valderrabano-Gonzalez A, Hernandez-Gonzalez M, Valenzuela FA. A Real-Time SOSM Super-Twisting Technique for a Compound DC Motor Velocity Controller. Energies. 2017; 10(9):1286.Chicago/Turabian Style
Morfin, Onofre A.; Castañeda, Carlos E.; Valderrabano-Gonzalez, Antonio; Hernandez-Gonzalez, Miguel; Valenzuela, Fredy A. 2017. "A Real-Time SOSM Super-Twisting Technique for a Compound DC Motor Velocity Controller." Energies 10, no. 9: 1286.