基于对数放大器的三通道合一测角方法

Angle Measurement Method of Three Channels in One Based on Logarithmic Amplifier

传统和差振幅单脉冲测角方法将俯仰差和偏航差信号正交调制后与和信号综合成一路公共的类似调幅的合成信号,再进行级联放大、自动增益控制、包络检波、正交解调等一系列处理,形成俯仰和偏航两路角误差信号。这种方法电路结构复杂、测角响应速度慢,不适用于单次照射时间较短的制导系统。针对传统测角方法存在的问题,提出了一种基于连续检波对数放大器的三通道合一测角方法。连续检波对数放大器动态范围较大,检波信号输出时间较短。这种测角方法电路结构简单,简化了硬件设计,缩短了测角时间。仿真及试验结果表明,基于连续检波对数放大器的测角方法具有测角精度高、延迟小的优点,适用于对测角响应速度要求较高的制导系统。

For traditional angle measurement method,the pitching difference signal and yawing difference signal are quadrature modulated and integrated with sum signal into a amplitude modulation signal,then the pitching angle and yawing angle signals are formed after a series of processing such as amplification,automatic gain control(AGC),detection and quadrature demodulation.The method has a complex circuit structure and has a low angle measurement response speed,which is not suitable for the guidance system with short single irradiation time.Aiming at the problem of the traditional angle measurement method,three channels in one angle measurement method based on continuous detector logarithmic amplifier is proposed.The continuous detection logarithmic amplifier has a large dynamic range,and the detection output time is short.The circuit structure of the proposed method is simple,which simplifies the hardware design,shortens the time of angle measurement.The simulation and test results show that the angle measurement method based on continuous detector logarithmic amplifier has the advantages of high accuracy and low delay,and it is suitable for the guidance system which requires high angle measurement response speed.