Hybrid Domain Error Suppression: A Synergistic Inertial Navigation Architecture Integrating Rotation Modulation and MEMS-IMU Array

Micro-Electro-Mechanical Systems Inertial Measurement Units (MEMS-IMUs) are widely used in navigation systems due to their low cost and compact size. However, their accuracy is limited by inherent sensor drift and noise, especially in long-duration applications. To address these challenges, this paper proposes a single-axis rotation modulation approach based on a MEMS-IMU differential array configuration. By integrating eight IMUs in a synchronized rotating structure, the method exploits spatial redundancy and periodic rotational motion to suppress random errors and bias drift. The principle of the method is described in detail, and the corresponding mathematical model is established. Experimental results show that the navigation error of the proposed method is reduced by an order of magnitude compared to the traditional single MEMS-IMU system, which verifies the effectiveness of the proposed method. This approach provides a cost-effective solution for improving MEMS-IMU performance in autonomous vehicles, drones, and robotic systems that require high-precision inertial navigation.