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discrete control of longitudinal dynamics for hypersonic flight vehicle using neural networks

Science China(Information Sciences) 2015年第7期58卷 49-58页

作者： ZHI YongFeng YANG YunYi School of Automation Northwestern Polytechnical University

The discrete controller is developed for the longitudinal dynamics of the hypersonic flight vehicle with neural networks(NNs). The focus is on the control of the Euler equations of attitude dynamics. With back-stepping design, for each step the virtual control is constructed with NNs approximating the unknown dynamics. The design uses less online adaption parameter learning scheme to achieve the control goal. It is guaranteed that the errors of all the signals in the system are uniformly ultimately bounded. The proposed method is verified by simulation of winged-cone model.

关键词： discrete control hypersonic vehicle back-stepping neural network adaption parameter

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Water-level based discrete integrated dynamic control to regulate the flow for sewer-WWTP operation

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Frontiers of Environmental Science & Engineering 2020年第3期14卷 103-111页

作者： Zhengsheng Lu Moran Wang Mingkai Zhang Ji Li Ying Xu Hanchang Shi Yanchen Liu Xia Huang State Key Joint Laboratory of Environment Simulation and Pollution control School of EnvironmentTsinghua UniversityBeijing 100084China School of Environment and Civil Engineering Jiangnan UniversityWuxi 214122China Wuxi Water Group Co.Ltd. Wuxi 214031China

This study aims to propose a multi-point integrated real-time control method based on discrete dynamic water level variations,which can be realized only based on the programmable logic controller(PLC)system without using a complex mathematical model.A discretized water level control model was developed to conduct the real-time control based on *** combines the upstream pumping stations and the downstream influent pumping systems of wastewater treatment plant(WWTP).The discretized water level control method can regulate dynamic wastewater pumping flow of pumps following the dynamic water level variation in the sewer *** control method has been successfully applied in practical integrated operations of sewer-WWTP following the sensitive flow disturbances of the sewer *** operational results showed that the control method could provide a more stabilized regulate pumping flow for treatment process;it can also reduce the occurrence risk of combined sewer overflow(CSO)during heavy rainfall events by increasing transport capacity of pumping station and influent flow in WWTP,which takes full advantage of storage space in the sewer system.

关键词： Sewer system Integrated control discrete control Water level

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