摘要
因为温度控制具有大时滞、大惯性的特点,以至于常规PID不能对其有效控制,所以一般需要采用具有参数自整定功能的自适应PID。不过,自适应PID的算法相对复杂,提高了使用与维护的难度,也增加了控制器成本。为此,设计并实现了一个简单有效的PID温控算法,该算法在常规PID算法的基础上做了两点改变,一是采用随温度变化趋势而变化的制动因子削弱大时滞的影响;二是采用随温度停滞时间而变化的积分速度因子调节积分速度,避免超调。该算法在一种旋转滴界面张力仪的温控系统中取得了不错的效果,为温控问题提供了简单有效的解决思路。
Usually, adaptive PID is used to supersede conventional PID in temperature control system because of large time-delay and large inertia. However, adaptive PID with complex self-turning function brings the difficulty for user and increases the cost of microcontroller. For this reason, this paper presents a simple and effective PID controller. The controller utilizes the braking factor that complies with the temperature trend to weaken the impact of the time-delay, utilizes the integrated velocity factor that complies with the delay time to avoid overshooting. It was proved that the PID controller achieved good effect in the temperature control system of a spinning drop tensiometer. The PID controller provides a simple and effective snlution to control temperature.
出处
《实验室研究与探索》
CAS
北大核心
2017年第10期4-7,40,共5页
Research and Exploration In Laboratory
基金
国家自然科学基金项目(41301514)
