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Switching Polytopic Linear Parameter-varying Control for Hypersonic Vehicles in Full Envelope
Weilai Jiang,Chenghong Zheng,Yaonan Wang,XueJiao Sun 제어·로봇·시스템학회 2024 International Journal of Control, Automation, and Vol.22 No.3
Gain scheduling control of hypersonic vehicles (HVs) in full envelope is studied utilizing switchingpolytopic linear parameter-varying (LPV) method. Envelope division and a new convex decomposition strategywith optimal gap metric are used to establish the switching polytopic LPV system of HVs. Sufficient conditions forstability assessment and controller synthesis for the switching polytopic LPV system are presented by average dwelltime (ADT) and multiple parameter-dependent Lyapunov functions (MPDLF). To reduce computation burden andsimplify the realization of controller, limited number of linear matrix inequalities (LMIs) are derived to dealing withswitching polytopic LPV controllers by constructing the intermediate controller variables are depend affinely on thescheduling parameter. Furthermore, to make the proposed method have better engineering value, the control matrixof LPV system studied in this paper may not have to be a constant matrix. Simulation results show the effectivenessof the switching polytopic LPV control method for HVs.
Yangyang Zhang,Yixiao Qin,Jinpeng Gu,Qianqian Jiao,Feng Wang,Zhenshan Guo,Hao Zhang,Jianjun Wang,Chenghong Mi,Huaipeng Zheng 대한기계학회 2021 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.35 No.8
Unsymmetrical complex plate and shell structure is one of the common engineering structures. In practice, more redundant materials exist because of the irrationality of this kind of structure with heavy load and multiple working conditions, and the study of its topology optimization has become an engaging topic. Using the SIMP model, topological results show that one side of the main web is a hollow structure, and the other side of the auxiliary web is a truss structure. According to the topological results and considering manufacturable processing, a new structure is redesigned, the size and shape of the redesigned structure is secondary optimized, and the final structure is obtained. The method in this paper not only meets the performance requirements of the unsymmetrical complex plate and shell structures, but also realizes the topology and lightweight. The effectiveness scientific research value of the proposed method is verified by engineering examples.