基于电磁力滤波的潜载定向能随动系统振动控制

潜航器在潜行时，由于来流和艇体的相互作用，潜航器及其所搭载的光电跟瞄系统会受到外界流场的扰动，使其产生不同频率和幅度的振动。通过壁面电磁流体边界层控制来抑制光电跟瞄系统的流致噪声，估计目标处能量累积控制效果。基于有限体积方法，分析雷诺数1×10⁷条件下同时具有6°偏航角和10°俯仰角的潜航器在有无流向电磁力控制时的流体动力学特征；对复合轴控制过程中直流力矩电机和快速反射镜两个执行机构进行建模并推演了系统的传递函数；大地坐标系下的潜航器力矩扰动通过坐标变换的方式转化到光轴坐标系下，将其作为扰动输入给复合轴控制系统，进一步用MATLAB仿真估计电磁力优化滤波方式对复合轴输出误差的补偿与控制效果。结果显示，电磁流体控制能改变艇体壁面的流场结构，抑制高频扰动涡，且能有效地增强目标区域内光斑的能量累积密度。

Electromagnetic Force Filter and Vibration Control Mechanism of the Submarine-based Directed Energy Tracking and PointingServo System

Submarine-based electro-optical tracking and pointing systems are always disturbed by the external flow field, which makes the vibrations with different frequencies and amplitudes generated from the interaction between the fluid and submarine. The strem-induced noise of the electro-optical tracking and pointing system is suppressed by controlling the boundary layer of wall electromagnetic fluid, and the control effect of energy accumulation is evaluated by using the wall Lorentz force. The hydrodynamic characteristics of submarine under or without the action of streamwise Lorentz force at Re=10⁷, a 6° yaw angle and a 10° pitch angle are numerically analyzed based on the finite volume method. The transfer functions of the direct current torque motor ( DTM ) and fast steering mirror ( FSM ) were deduced and simulated to evaluate the control effect of Lorentz force on the output error of the composite axis tracking system. The torque disturbance of submarine is transformed from the earth coordinate system to the optical axis coordinate system, which is used as the disturbance inputs of the tracking and pointing system in MATLAB Simulink to simulate and analyze the final control precision for azimuth/pitch angles. The results show that the Lorentz control method can be used to effectively alter the flow field structure on the submarine wall surface, suppress the high-frequency disturbance vortexes and enhance the laser directed energy density on a target.