**3. ASPF Control Strategy**

The control strategy is the core of this paper and plays an important role in every performance of the HEB. It was developed and optimized according to three current problems that we found in existing research. Therefore, the target problems are presented below, firstly by simulating the operation and control process. The methodology of the control strategy is based on fuzzy control theory, a filter algorithm, optimization, and a rule-based strategy. The detailed structure and composition of the proposed control strategy is then introduced.
