基于模糊控制的天幕靶高灵敏度技术研究

Study of sky screen's high sensitivity based on fuzzy control

探测灵敏度是衡量天幕靶性能优劣的重要指标,针对以往探测灵敏度控制方法存在的缺点,现提出了一种基于模糊控制原理的自动增益控制(AGC)方法。该方法用背景天空亮度高低和背景噪声大小作为控制用的调节因素,通过压控增益放大器改变模拟信号通道的电压增益,实现了灵敏度的自动控制。通过实验表明,采用AGC模糊控制方法,在相同的实验条件下,在提高了探测灵敏度的同时,弹丸信号幅值波动范围减小为原来的1/2,实现了天幕靶高稳定性、高灵敏度、自适应性强的目的。

Sensitivity is a key characteristic indicating performance of sky screen. For the shortcomings of the methods used in sensitivity controlling as before, one automatic gain control （AGC） method based on fuzzy control principle is proposed in this paper. In such method, sky background brightness and noise level issued by background are taken as two major factors used to control voltage of AGC circuit. By means of voltage-controlled gain amplifier changing analog channel＇s gain, the apparatus sensitivity is controlled automatically. Experiment result show that, in the same test condition, sensitivity is improved as well as variation range of signal amplitude is reduced to 1/2 of original. It can be used to achieve high stability, more sensitive, smart adaptive for sky screen.