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In this paper, the quasi-Newton method is presented and the improved quasi-Newton method based on feedback is provided, which can be used in strongly coupled nonlinear time-variable system and improve the control speed and precision. Combining the carrying robot, the application of the improved quasi-Newton method is given and the simulation results show the validity of the method.
This paper deals with a control approach dedicated to stable limit cycle generation for underactuated mechanical systems. The proposed approach is based on partial nonlinear feedback linearization and dynamic control for optimal periodic reference trajectories tracking. Simulation results and experiments show the efficiency of the proposed approach.
This paper presents three control schemes for PM spherical stepper motor drive. In the neural network PD control scheme, the neural network is used to train the control parameters online. Based on the non-linear system dynamic model under continuous trajectory tracking mode, the robust neural network control scheme is presented to eliminate uncertainties to improve the trajectory tracking robust stability...
There are many uncertainties and disturbances in real dynamics system of spherical stepper motor that make traditional control methods with lower precision. Based on the non-linear system dynamic model under continuous trajectory tracking mode, the robust neural network control scheme is presented to eliminate uncertainties to improve the trajectory tracking robust stability and overcome the undesired...
This work presents an optimum approach to design PI controllers of permanent magnetic brushless DC motor (PBLDCM) to solve the traditional shortcomings of the existing PI algorithm. The primary design goal is to optimize the transient response by minimizing the maximum overshoot, settling time, rise time of step response. This study proposes a non-liner PI controller based on ant colony system (ACS)...
In this study a new combination of nonlinear backstepping scheme with off-line fuzzy system is presented for controlling a rotary inverted pendulum system to achieve better performance in nonlinear controller. The inverted pendulum, a popular mechatronic application, exists in many different forms. The common thread among these systems is their goal: to balance a link on end using feedback control...
Continuously variable transmissions (CVT) have received great interest as viable alternative to discrete ratio transmission in passenger vehicle. It is generally accepted that CVTs have the potential to provide such desirable attributes as: a wider range ratio, good fuel economy, shifting ratio continuously and smoothly and good driveability. With the introduction of continuously variable transmission...
In this paper a robust nonlinear controller is presented for doubly-fed induction machine (DFIM) drives. The nonlinear controller is designed based on combination of Sliding-Mode (SM) and Adaptive-Backstepping control techniques. Using the fifth order model of DFIM in a stator d, q axis reference frames with stator currents and rotor fluxes as state variables, a SM controller is designed in order...
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