机载SAR天线稳定平台伺服控制系统的算法设计改进

机载合成孔径雷达采用天线稳定平台对载机角运动误差进行补偿,使天线在惯性空间保持稳定并跟踪地速方向.平台数字伺服控制系统的设计采用单片FPCA替代DSP&CPLD现有方案,即在单片FPGA上完成数据采集、滤波及控制算法处理,并输出PWM信号进行电机调速控制.本文提出以双速度环控制替代传统的仅由光纤陀螺作为反馈元件的单速度环控制,并提出基于提升方案的小波阈值滤波、增益矩阵离线计算的常增益α-β-γ滤波、速度和加速度前馈等算法改进措施,在提高系统控制精度的同时,便于FPGA硬件实现以满足实时性要求,具有很强的工程应用价值.

Study on Algorithm for Servo Controlling System of Antenna Stabilized Platform of Air-borne SAR

The Antenna Stabilized Platform of Air-borne SAR(Synthesis Aperture Radar) can compensate the angle movement error of the radar carrier,to keep the antenna stable in the inertial place and trace the velocity to the ground.We design the servo controlling system of the platform on single FPGA chip,to implement sampling,processing of the filter and control algorithms,and PWM speed regulating of DC torque motors.This paper introduces double rate-loop servo control,lifting wavelet threshold-value filter,fixed-ga...