Problems with predictive control and underlying PID control
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I was wondering if there are any seniors who are familiar with predictive control and basic PID control. My question is this: The control frequencies of the MPC control layer and the basic PID control layer are different; MPC operates on a minute-scale, while the basic PID operates on a second-scale. Since their sampling rates differ, does this have any impact on the MPC control? How to solve it? I’ve seen papers that consider things from a multi-scale perspective, but I don’t understand it. If any seniors are aware of this, please feel free to give me some guidance! ! ! Thank you! ! ! {:2_32:}{:2_41:}
Predictive control and underlying PID control: In recent years, an increasing number of researchers have adopted advanced control algorithms such as model predictive control at the upper level, while retaining the traditional PID control algorithm at the lower level – namely, the so-called predictive PID control algorithm
Thank you for your answer. {:2_30:}{:2_36:} Since the frequency of the lower-level control system differs from that of the higher-level advanced control system, could this lead to a situation where, for example, the lower-level system generates 60 output values per minute, while the MPC layer provides only one control value per minute to the lower-level system – meaning that the MPC layer controls only one of those 60 output values. So how can those 59 unused values be made use of effectively? I’ve seen some technical articles that consider multi-scale methods to address the issue of different control frequencies at two levels, but I don’t understand them. . .