论文部分内容阅读
众所周知,位式调节是一种简单、可靠、投资少、维护量小的调节方式。它的特性是:当被调参数偏离给定值时,调节器就有最大或最小输出,从而使调节阀全开或全关、继电器吸合或释放(见图1)。这对于一些惯性大,纯滞后小,而且允许被调参数有一定波动范围的调节对象如:各种恒温箱及电冰箱的温度调节,贮罐的液位调节和压力调节等都能得到较满意的效果。但是,位式调节能不能应用在控制精度要求较高的化学反应罐和发酵罐的温度控制上,这对于目前要求仪表维
As we all know, bit adjustment is a simple, reliable, low investment, small amount of maintenance adjustment. Its characteristics are: When the adjusted parameters deviate from the given value, the regulator has a maximum or minimum output, so that the valve fully open or closed, the relay pull or release (see Figure 1). This for some large inertia, small hysteresis, but also to be transferred parameters have a range of regulating objects such as: a variety of incubators and refrigerators temperature regulation, tank level adjustment and pressure regulation can be more satisfied Effect. However, the position adjustment can not be applied in the control of the chemical reaction tank and fermenter temperature control, which is required for the current instrument dimensions