常规的数据仓库应用中，分析和决策较多地依赖于用户参与。为了在自动决策以及实时性等方面对常规的数据仓库进行改进，文章设计了一种主动数据仓库（Active Data Warehouse）体系结构。它在常规的数据仓库的基础上引进了分析规则。通...常规的数据仓库应用中，分析和决策较多地依赖于用户参与。为了在自动决策以及实时性等方面对常规的数据仓库进行改进，文章设计了一种主动数据仓库（Active Data Warehouse）体系结构。它在常规的数据仓库的基础上引进了分析规则。通过对主动规则的改进而设计的分析规则能满足主动数据仓库的特性。相应地还对数据仓库的元数据进行了扩展。展开更多
This paper presents the construction of an active suspension control of a one-wheel car model using fuzzy reasoning and a disturbance observer. The one-wheel car model to be treated here can be approximately described...This paper presents the construction of an active suspension control of a one-wheel car model using fuzzy reasoning and a disturbance observer. The one-wheel car model to be treated here can be approximately described as a nonlinear two degrees of freedom system subject to excitation from a road profile. The active control is designed as the fuzzy control inferred by using single input rule modules fuzzy reasoning, and the active control force is released by actuating a pneumatic actuator. The excitation from the road profile is estimated by using a disturbance observer, and the estimate is denoted as one of the variables in the precondition part of the fuzzy control rules. A compensator is inserted to counter the performance degradation due to the delay of the pneumatic actuator. The experimental result indicates that the proposed active suspension system improves much the vibration suppression of the car model. Key words One-wheel car model - Active suspension system - Single input rule modules fuzzy reasoning - Pneumatic actuator - Disturbance observer Document code A CLC number TH16展开更多
文摘常规的数据仓库应用中，分析和决策较多地依赖于用户参与。为了在自动决策以及实时性等方面对常规的数据仓库进行改进，文章设计了一种主动数据仓库（Active Data Warehouse）体系结构。它在常规的数据仓库的基础上引进了分析规则。通过对主动规则的改进而设计的分析规则能满足主动数据仓库的特性。相应地还对数据仓库的元数据进行了扩展。
文摘This paper presents the construction of an active suspension control of a one-wheel car model using fuzzy reasoning and a disturbance observer. The one-wheel car model to be treated here can be approximately described as a nonlinear two degrees of freedom system subject to excitation from a road profile. The active control is designed as the fuzzy control inferred by using single input rule modules fuzzy reasoning, and the active control force is released by actuating a pneumatic actuator. The excitation from the road profile is estimated by using a disturbance observer, and the estimate is denoted as one of the variables in the precondition part of the fuzzy control rules. A compensator is inserted to counter the performance degradation due to the delay of the pneumatic actuator. The experimental result indicates that the proposed active suspension system improves much the vibration suppression of the car model. Key words One-wheel car model - Active suspension system - Single input rule modules fuzzy reasoning - Pneumatic actuator - Disturbance observer Document code A CLC number TH16
