PROJECT TITLE :
A Linear Quadratic Regulator-Based Optimal Direct Thrust Force Control of Linear Permanent-Magnet Synchronous Motor
Linear permanent-magnet machines are typically characterised by low inductance and short pole-pitch which leads to a little operational range of load angles. The resultant management performance using standard direct thrust force control (DTFC) techniques is poor with high force ripple. This research improves this side of DTFC. A unique multiple-input multiple-output (MIMO) state-area model, independent of the mover's speed, having stator flux and thrust force as states, is formulated for the linear permanent-magnet synchronous motor (PMSM). An optimal linear state feedback control theme is then designed using the optimal linear quadratic regulator technique. Integral action is added to the designed control theme by state augmentation to attenuate the steady-state error and scale back the force ripple. Experimental results clearly prove that the proposed optimal management scheme ends up in a faster transient response of speed and force with improved steady-state regulation of force and flux when put next to the state of the art.
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