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论文作者:www.51lunwen.org论文属性:短文 essay登出时间:2013-10-29编辑:yangcheng点击率:4929
论文字数:1422论文编号:org201310271011308173语种:英语 English地区:中国价格:免费论文
摘要:实际的控制系统,有一个饱和特性。当控制变量达到某一值时,系统的输出变量不再生长时,系统进入饱和区。这就要求系统的控制变量,必须限制在一定范围内,有时会是有限的控制量的变化率。
最广泛使用的调节器控制规律是比例,积分,微分控制,简称为PID控制,也称为PID调节器。 PID控制器的出现已经近70年的历史,其结构简单,稳定性好,工作可靠,调整方便,并成为一个重要的工业控制技术进行了。当被控对象的结构和参数不能完全掌握,或缺乏精确的数学模型,控制理论是很难用其他技术,系统控制器的结构和参数必须依靠经验和现场调试来确定,当应用PID控制是最方便的。
The most widely used regulator control law is a proportional , integral, differential control , referred to as PID control , also known as PID regulator . The advent of the PID controller has been nearly 70 years of history , with its simple structure , good stability , reliable , easy to adjust and become a major industrial control technology a . When the structure and parameters of the controlled object can not fully grasp , or the lack of a precise mathematical model, control theory is difficult to use other technologies , the system controller structure and parameters must rely on experience and on-site commissioning to determine , when the application PID control is most convenient. That is, when we do not fully understand a system and the controlled object , or can not be an effective means of measurement to obtain the system parameters , the most suitable PID control . PID control , in practice there are PI and PD control . PID controller is based on the error of the system , using a proportional , integral , differential control amount is calculated for the control .
比例(P)控制比例控制是一种简单的控制。其控制器的输出与输入误差信号成比例关系。当只有比例控制时系统输出存在稳态误差(稳态误差)。
Proportional (P) control : Proportional control is a simple control. Its controller's output and input error signal proportional relationship . When only proportional control system output when there is steady-state error (Steady-state error).
比例调节的相称反应系统的偏差,一旦系统出了问题,比例控制调节立即减少偏差。比例的效果,并能加快调整,减少错误,但比重过大,因此,关闭系统的稳定性,甚至会导致系统不稳定。
Proportional regulation : a proportionate response system deviation , once the system has gone wrong , proportional control regulation to reduce immediate bias. Proportional effect, and can speed up the adjustment, reduce errors, but the proportion is too large , so that the stability of the system down , and even cause system instability.