Tracking Control Of DC Motors Research Articles

Signal differentiation in position tracking control of dc motors

An asymptotic differentiation approach with respect to time is used for on-line estimation of velocity and acceleration signals in controlled dc motors. The attractive feature of this differentiator of signals is that it does not require any system mathematical model, which allows its use in engineering systems that require the signal differentiation for its control, identification, fault detection, among other applications. Moreover, it is shown that the differentiation approach can be applied for output signals showing a chaotic behavior. In addition a differential flatness control scheme with additional integral compensation of the output error is proposed for tracking tasks of position reference trajectories for direct current electric motors using angular position measurements only.

Tracking control of DC motors via mimo nonlinear fuzzy control

This paper proposed a nonlinear controller for speed tracking of separately excited DC motors (SEDCM’s) using the multi-input multi-output (MIMO) fuzzy logic controller (FLC’s). Based on a nonlinear mathematical model of SEDCM, a FLC is designed to achieve high performance speed tracking through rejection load disturbance. Computer simulations are presented to show speed tracking performance and the effectiveness of the proposed controller.

Tracking control of DC motors via an improved chattering alleviation control

An improved version of the chattering alleviation control (CAC) augmented with boundary layers is proposed. It preserves all the features of CAC and exhibits three additional advantageous properties. First, the resultant control law is continuous instead of the discontinuous function proposed in CAC. Second, the chattering level is smaller than that of CAC. Third, the parameters in the boundary layer approach can be determined quantitatively via this algorithm. The resultant system via this nonlinear feedback control law is proved to be asymptotically stable, which is then applied to the tracking control of DC motors. Experimental results indicate that the high-speed tracking of the desired trajectory can be achieved. In addition, the applied armature voltage contains fewer higher frequency components as compared to other variable structure systems control. >