This paper mainly discusses about the full-order state observation technology for the permanent magnet synchronous motor (PMSM) drive system. First. the concept of the Kalman filter (KF) is synthesized to design a novel fixed gain filter (FGF) with an optimal fixed feedback gain matrix. which ensures a fast and accurate observation for position. https://parisnaturalfoodes.shop/product-category/echinacea-with-goldenseal-root/