天线指向精确控制的自适应最优姿态外推

H. Lee
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引用次数: 0

摘要

介绍了一种用于机载雷达天线精确控制的自适应姿态外推器。外推器是一种优化设计,可以提供最小均方角预测误差的外推输出。该系统自动考虑了惯性导航系统姿态测量噪声、飞行器机动和环境阵风等因素的影响。由于外推滤波系数是在实时估计飞机姿态运动自相关滞后的基础上计算的,因此能够适应不同的操作条件。分析和仿真结果表明,与传统的确定性姿态外推器相比,采用自适应外推器可以显著降低天线指向误差。自适应外推器适用于机载相控阵雷达系统进行单脉冲角测量,对雷达天线的精确指向至关重要。
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Adaptive optimum attitude extrapolation for precise antenna pointing control
An adaptive attitude extrapolator is described for the precise control of an airborne radar antenna. The extrapolator is an optimum design that provides extrapolation output with minimal mean-square angular prediction error. The effects of INS (inertial navigation system) attitude measurement noise, aircraft maneuver, and environmental gust condition are automatically taken into account. Because the extrapolation filter coefficients are computed on the basis of a real-time estimate of the aircraft attitude motion autocorrelation lags, it is capable of adapting to the varying operating conditions. Analysis and simulation results show a significantly lower antenna pointing error with the use of the adaptive extrapolator than with the conventional deterministic attitude extrapolator. The adaptive extrapolator is applicable to airborne phase-array radar systems making monopulse angular measurements for which the precise pointing of the radar antenna is crucial.<>
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