Performance enhancement of PMSM using a hybridizing of nonlinear backstepping control and an optimized linear quadratic regulatorDjaloul Karboua, Belgacem Toual, Mohamed I. Mosaad, Chouiha Youcef, Abdelkader Azzeddine Bengharbi, Shimaa Aly HussienEnergy Exploration & ExploitationVolume 43، (6)، Pages 2637-26642025Article Open access 6