Cooling/heating dual-stage actuators decoupling structure design and energy management strategy for thermostatic airflow control
Thermal Science and Engineering Progress(2023)
摘要
The temperature control system is required to have both cooling and heating actuators to achieve a high -precision thermostatic indoor air environment of industrial buildings. The coupling of the two actuators and the generation of redundant energy consumption leave a sufficient gap to be optimized. Combining the Linear Quadratic Regulator (LQR) approach with the sensitivity decoupling structure, we construct a dual-stage PI controller for this type of dual-input single-output system. Meanwhile, a proposed energy management technique for lowering energy consumption can alter the controlled quantities adaptively and synergistically. Accordingly, the multi-objective teaching-learning-based optimization algorithm is implemented to determine the optimal parameters and establish a balance between temperature stability and energy consumption. Simulation and experimental platforms are built to verify the design effect. Compared with four typical single -stage PI controller tuning algorithms, the proposed method has better output temperature stability with an improvement of the index by at least 14%. And the results reveal that the control input is decreased by 45.6% when the energy management technique is implemented, while the stability index of the final output temperature is maintained at about the same level.
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关键词
Air temperature control,Dual-Input-Single-Output system,Energy management strategy,Linear Quadratic Regulator (LQR),Multi-objective optimization
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