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一、概述我们这台伪随机信号发生器是为热自研究室的课题“电厂热工自动控制系统参数辨识”而制做的专用设备.它所产生的伪随机信号是由数字电路产生的一种周期性重复的信号.并且,它的自相关函数、功率谱密度和概率密度函数具有类似白噪声的统计特性.课题对该设备在精度、可靠性及抗干扰能力方面都要求较高,并要求使用方便,便于携带.为了达到这些要求,在唐明辉老师的指导下,我们在天津电子仪器厂XT_(21)型伪随机信号发生器资料的基础上进行了针对上述要求的改进工作。下面先简单介绍该设备的工作原理,然后叙述在几个方面是如何改进的。
First, an overview of our pseudo-random signal generator is a hot research laboratory from the subject of “thermal power plant automation control system parameter identification,” and made of special equipment.It generates pseudo-random signal is generated by a digital circuit And its periodic autocorrelation function, power spectral density and probability density function have similar statistical characteristics of white noise.The subject of the equipment requirements in accuracy, reliability and anti-interference ability are high, and In order to meet these requirements, under the guidance of Professor Tang Minghui, we made improvements to meet the above requirements based on the data of XT_ (21) pseudo-random signal generator in Tianjin Electronic Instrument Factory. The following briefly introduces the working principle of the device, and then describes how to improve in several ways.