The modular design pattern revolutionizes the monolithic morphology of traditional spacecraft into the reconfigurable combination of modular units.However,due to the morphological changes,the effective takeover contro...The modular design pattern revolutionizes the monolithic morphology of traditional spacecraft into the reconfigurable combination of modular units.However,due to the morphological changes,the effective takeover control of the combination through multiple independent modules,including the controller and actuator modules,remains a challenge.In this paper,a robust takeover control scheme with high allocation accuracy,independent of precise inertia,is proposed for the reconfigurable combination in the presence of the inertia uncertainty,model parameters uncertainty,communication delay,and external disturbance.By reregulating the conditions for performance synthesis into a symmetric form with similar structure,a hybrid non-fragile H_(2)/H_(∞)controller is designed for handling two types of controller gain perturbations,achieving superior performance with less energy consumption through simultaneous perturbation suppression.Moreover,through temporarily storing the allocation signals in the initial stage to cover the upper bound of the communication delay,the proposed distributed dynamic allocation scheme enables the actuator modules to implement the control signals jointly to stabilize the combination.Distinguished from general allocators,the proposed high-precision allocation scheme under communication delay can not only ensure full exploitation of controller performance,but also dynamically adjust allocation coefficients based on energy consumption index of controller modules to prevent actuator saturation.Numerical simulations demonstrate the superiority of the proposed hybrid non-fragile controller and the allocation scheme.展开更多
According to the differences between operation and correlationship by both sides of the takeover in the market for corporate control, the takeover can be divided into three types--transverse takeover, longitudinal tak...According to the differences between operation and correlationship by both sides of the takeover in the market for corporate control, the takeover can be divided into three types--transverse takeover, longitudinal takeover and mixed takeover. Meanwhile, due to the activities of takeover taken by the companies in the different trade life circles adopting different takeover types, so their performances are different. Seeing about this relationship, you can effectively inspect the efficiency of the market for corporate control. Adopting298 stylebook data from the market for corporate control in China, and through empirical analyzing, it can see that because of the existing of the stock holding, the efficiency of the market for corporate control in China is not very high. The government tempts to adjust the industrial structure through merger and acquisition （M＆A）, but it urged the aim of state-owned economy forward strategic transfer difficult to come true. To solve the contradiction of ＂setting up of the stock holding＂ comes to no time to delay. ＇展开更多
基金co-supported by the National Natural Science Foundation of China(No.12372048)the China Postdoctoral Science Foundation(No.2023M742835)+3 种基金the Guangdong Basic and Applied Basic Research Foundation,China(No.2023A1515011421)the Aeronautical Science Foundation of China(No.2022Z004053001)the Fundamental Research Funds for the Central Universities,China(No.D5000210833)the Young Talent Fund of Association for Science and Technology in Shaanxi,China(No.20220509)。
文摘The modular design pattern revolutionizes the monolithic morphology of traditional spacecraft into the reconfigurable combination of modular units.However,due to the morphological changes,the effective takeover control of the combination through multiple independent modules,including the controller and actuator modules,remains a challenge.In this paper,a robust takeover control scheme with high allocation accuracy,independent of precise inertia,is proposed for the reconfigurable combination in the presence of the inertia uncertainty,model parameters uncertainty,communication delay,and external disturbance.By reregulating the conditions for performance synthesis into a symmetric form with similar structure,a hybrid non-fragile H_(2)/H_(∞)controller is designed for handling two types of controller gain perturbations,achieving superior performance with less energy consumption through simultaneous perturbation suppression.Moreover,through temporarily storing the allocation signals in the initial stage to cover the upper bound of the communication delay,the proposed distributed dynamic allocation scheme enables the actuator modules to implement the control signals jointly to stabilize the combination.Distinguished from general allocators,the proposed high-precision allocation scheme under communication delay can not only ensure full exploitation of controller performance,but also dynamically adjust allocation coefficients based on energy consumption index of controller modules to prevent actuator saturation.Numerical simulations demonstrate the superiority of the proposed hybrid non-fragile controller and the allocation scheme.
文摘According to the differences between operation and correlationship by both sides of the takeover in the market for corporate control, the takeover can be divided into three types--transverse takeover, longitudinal takeover and mixed takeover. Meanwhile, due to the activities of takeover taken by the companies in the different trade life circles adopting different takeover types, so their performances are different. Seeing about this relationship, you can effectively inspect the efficiency of the market for corporate control. Adopting298 stylebook data from the market for corporate control in China, and through empirical analyzing, it can see that because of the existing of the stock holding, the efficiency of the market for corporate control in China is not very high. The government tempts to adjust the industrial structure through merger and acquisition （M＆A）, but it urged the aim of state-owned economy forward strategic transfer difficult to come true. To solve the contradiction of ＂setting up of the stock holding＂ comes to no time to delay. ＇
