A weighted least squares (WLS) algorithm is proposed to reduce the noise of rotary variable differential transformer (RVDT) and resolver in active side stick servo tracking system. Based on the least squares algorithm and the recursive least squares algorithm, the active side stick system is studied. The active side stick servo tracking system is analyzed and simulated by the least squares algorithm, the recursive least squares algorithm, the WLS algorithm and the fusion algorithm. By comparing the simulation results of the 3 fusion algorithms, the results show that the algorithm can make the servo system obtain more accurate position information, and has the superiority and feasibility of removing noise.