天幕靶灵敏度自适应控制技术研究

Technique of Adaptive Control for the Sensitivity of Sky Screen Target

摘要:

为了解决天幕靶的探测灵敏度受外界环境光变化影响引起探测性能不稳定的问题，提出了一种基于天空亮度自适应调节的天幕靶灵敏度稳定的方法。对天幕靶的探测灵敏度模型进行了分析，确定了天空背景亮度、噪声和弹丸口径和速度等为主要影响因素；通过控制光通量、改变偏置电阻以及调整电路增益等手段，有效地实现了灵敏度自适应稳定的要求。经实弹试验验证，天幕靶输出信号的幅值波动范围减小为原来的35%，实现了天幕靶适应性强且灵敏度稳定的要求。

Abstract:

To solve the problem that the detection sensitivity of the sky screen is reduced by the external environment, the sensitivity of the sky screen target is proposed based on the automatic control principle. The method uses the background brightness of the sky, the noise level and the projectile speed as the adjustment factors. The liquid crystal dimming film controls the luminous flux, changes the resistance of the bias resistor, and changes the circuit amplification factor through the process control amplifier to achieve the sensitivity stability requirement. Experiments show that the amplitude fluctuation range of the sky screen target signal is reduced to 35%, which improves the sensitivity of the sky screen target, and achieves the requirements of strong adaptability and sensitivity of the sky screen target.