前馈控制在某开式外融冰空调系统冷水温度优化控制中的应用*
Application of feed-forward control to chilled water temperature optimal control of open-loop external ice melting air conditioning system
摘要：
为解决开式外融冰空调系统冷水供水温度受冰槽出水温度影响容易出现大幅波动的问题，提出了基于能量守恒的前馈-反馈控制策略：利用前馈控制作用快速消除冰槽出水温度扰动导致的动态偏差，同时采用闭环控制策略消除静态偏差，将冷水供水温度稳定控制在给定值范围内。在国内某大型机场制冷站中的应用结果表明，与常规PID控制策略相比，该控制策略具有动态超调量小、控制过程时间短、稳态偏差小的特点。同时，该控制策略的前馈控制作用计算简便，无需建立传递函数模型，具有较好的工程适应性和应用前景。
Abstract：
In order to solve the problem that the chilled water supply temperature of open-loop external ice melting air conditioning system is easily affected by the outlet water temperature of the ice tank, proposes a feed-forward feedback control strategy based on energy conservation: quickly eliminates the dynamic deviation caused by the outlet water temperature disturbance of the ice tank by the feed-forward control function, and eliminates the static deviation by using the closed-loop control strategy to stabilize the chilled water supply temperature within the given value range. The application results in a large domestic airport refrigeration station show that compared with the conventional PID control strategy, the control strategy has the characteristics of small dynamic overshoot, short control process time and small steady-state deviation. At the same time, the feed-forward control function of the control strategy is simple without the transfer function model, which has better engineering adaptability and application prospect.
Keywords:external ice melting, open cycle, chilled water temperature, optimal control, feed-forward control