基于模糊控制的惯导内阻尼改进方法

Improved Internal Damping Method with Fuzzy Controller for INS

阻尼技术能衰减惯导系统的周期性振荡误差。固定阻尼系数的传统阻尼方法难以适应不同运动加速度下的阻尼需求。为解决上述问题,提出一种采用模糊控制的改进方法。设计阻尼系数可调的阻尼网络,利用模糊规则分析运动加速度的大小,控制阻尼网络调整参数,从而实现阻尼系数的适时调整。仿真结果表明,改进方法能有效衰减振荡并且减少载体机动引起的动态误差。

Damping technique can effectively attenuate the periodic oscillations of inertial navigation system （INS）. Conventional methods with fixed damping ratio can hardly satisfy various maneuvering situations. To over- come this limitation, an improved method with fuzzy controller is proposed. The main idea is to adjust damping ratio according to vehicle acceleration. An adjustable damping network is adopted, which has a single parameter propor- tional to the damping ratio. A fuzzy controller is designed to adjust damping network by analyzing the value of accel- eration. Simulation results prove that the proposed method can attenuate oscillations and reduce negative influence of vehicle acceleration.