Missile interception problem can be regarded as a two-person zero-sum differential games problem,which depends on the solution of Hamilton-Jacobi-Isaacs(HJI)equa-tion.It has been proved impossible to obtain a closed-f...Missile interception problem can be regarded as a two-person zero-sum differential games problem,which depends on the solution of Hamilton-Jacobi-Isaacs(HJI)equa-tion.It has been proved impossible to obtain a closed-form solu-tion due to the nonlinearity of HJI equation,and many iterative algorithms are proposed to solve the HJI equation.Simultane-ous policy updating algorithm(SPUA)is an effective algorithm for solving HJI equation,but it is an on-policy integral reinforce-ment learning(IRL).For online implementation of SPUA,the dis-turbance signals need to be adjustable,which is unrealistic.In this paper,an off-policy IRL algorithm based on SPUA is pro-posed without making use of any knowledge of the systems dynamics.Then,a neural-network based online adaptive critic implementation scheme of the off-policy IRL algorithm is pre-sented.Based on the online off-policy IRL method,a computa-tional intelligence interception guidance(CIIG)law is developed for intercepting high-maneuvering target.As a model-free method,intercepting targets can be achieved through measur-ing system data online.The effectiveness of the CIIG is verified through two missile and target engagement scenarios.展开更多
该文首先简要介绍了无线电掩星探测技术及其发展现状和传统Abel变换方法面临的问题。为改进传统Abel变换反演方法,利用电子密度廓线的分离假设,引进了分离假设反演法。随后利用国际电离层参考模式IRI2007给出1000个掩星事件截面的模拟...该文首先简要介绍了无线电掩星探测技术及其发展现状和传统Abel变换方法面临的问题。为改进传统Abel变换反演方法,利用电子密度廓线的分离假设,引进了分离假设反演法。随后利用国际电离层参考模式IRI2007给出1000个掩星事件截面的模拟数据及COSMIC卫星星座的一天实测数据,进行比较计算,并对结果进行了分析,验证了分离假设反演法的有效性。文中还给出了垂直电子总量VTEC(Vertical Total Electron Content)先验场的获取途径。最后,对分离假设反演法的进一步研究的方向进行了探讨。展开更多
文摘Missile interception problem can be regarded as a two-person zero-sum differential games problem,which depends on the solution of Hamilton-Jacobi-Isaacs(HJI)equa-tion.It has been proved impossible to obtain a closed-form solu-tion due to the nonlinearity of HJI equation,and many iterative algorithms are proposed to solve the HJI equation.Simultane-ous policy updating algorithm(SPUA)is an effective algorithm for solving HJI equation,but it is an on-policy integral reinforce-ment learning(IRL).For online implementation of SPUA,the dis-turbance signals need to be adjustable,which is unrealistic.In this paper,an off-policy IRL algorithm based on SPUA is pro-posed without making use of any knowledge of the systems dynamics.Then,a neural-network based online adaptive critic implementation scheme of the off-policy IRL algorithm is pre-sented.Based on the online off-policy IRL method,a computa-tional intelligence interception guidance(CIIG)law is developed for intercepting high-maneuvering target.As a model-free method,intercepting targets can be achieved through measur-ing system data online.The effectiveness of the CIIG is verified through two missile and target engagement scenarios.
基金Project supported by the Natural Science Foundation of Chonging(CSTC-2005BB1154)Agricultural Wild Plants Protection Financial Project of Department of Agriculture of China(2005076)
文摘该文首先简要介绍了无线电掩星探测技术及其发展现状和传统Abel变换方法面临的问题。为改进传统Abel变换反演方法,利用电子密度廓线的分离假设,引进了分离假设反演法。随后利用国际电离层参考模式IRI2007给出1000个掩星事件截面的模拟数据及COSMIC卫星星座的一天实测数据,进行比较计算,并对结果进行了分析,验证了分离假设反演法的有效性。文中还给出了垂直电子总量VTEC(Vertical Total Electron Content)先验场的获取途径。最后,对分离假设反演法的进一步研究的方向进行了探讨。
