Group 1 - Dongfeng Motor Corporation has applied for a patent titled "A Redundant Control Method and System, Device, Medium Without Position Sensors," with publication number CN121425169A, and the application date is November 2025 [1] - The patent provides a method that includes obtaining RPS signals, estimating the motor's rotor angle and speed when RPS signals are invalid, and using these estimates for closed-loop control of the motor [1] - This invention effectively shields against instantaneous interference, prevents frequent functional degradation due to sensor failures, and enhances user experience by ensuring basic braking capability even after sensor failure [1] Group 2 - Dongfeng Motor Corporation, established in 2001 and located in Wuhan, primarily engages in the automotive manufacturing industry [2] - The company has a registered capital of 858,937,000 RMB and has made investments in 44 enterprises, participated in 5,000 bidding projects, and holds 5,000 patent records [2] - Additionally, the company possesses 156 administrative licenses, indicating a robust operational framework [2]