2014年9月24日,ARM宣布推出最新的32位Cortex-M处理器Cortex-M7,这款处理器相较于目前性能最高的ARM架构微控制器(M C U),可大幅提升两倍的运算及数字信号处理(DSP)性能。ARM Cortex-M7处理器针对高端嵌入式应用,适用于新一代汽车电子...2014年9月24日,ARM宣布推出最新的32位Cortex-M处理器Cortex-M7,这款处理器相较于目前性能最高的ARM架构微控制器(M C U),可大幅提升两倍的运算及数字信号处理(DSP)性能。ARM Cortex-M7处理器针对高端嵌入式应用,适用于新一代汽车电子、连网设备以及智能家居与工业应用。在M7之前,ARM Cortex-M系列内核已推出多款产品:MO、MO+、M3、M4等,在市场上应用极广。展开更多
This paper describes a supervisory hierarchical fuzzy controller （SHFC） for regulating pressure in a real-time pilot pressure control system. The input scaling factor tuning of a direct expert controller is made usi...This paper describes a supervisory hierarchical fuzzy controller （SHFC） for regulating pressure in a real-time pilot pressure control system. The input scaling factor tuning of a direct expert controller is made using the error and process input parameters in a closed loop system in order to obtain better controller performance for set-point change and load disturbances. This on-line tuning method reduces operator involvement and enhances the controller performance to a wide operating range. The hierarchical control scheme consists of an intelligent upper level supervisory fuzzy controller and a lower level direct fuzzy controller. The upper level controller provides a mechanism to the main goal of the system and the lower level controller delivers the solutions to a particular situation. The control algorithm for the proposed scheme has been developed and tested using an ARM7 microcontroller-based embedded target board for a nonlinear pressure process having dead time. To demonstrate the effectiveness, the results of the proposed hierarchical controller, fuzzy controller and conventional proportional-integral （PI） controller are analyzed. The results prove that the SHFC performance is better in terms of stability and robustness than the conventional control methods.展开更多
文摘2014年9月24日,ARM宣布推出最新的32位Cortex-M处理器Cortex-M7,这款处理器相较于目前性能最高的ARM架构微控制器(M C U),可大幅提升两倍的运算及数字信号处理(DSP)性能。ARM Cortex-M7处理器针对高端嵌入式应用,适用于新一代汽车电子、连网设备以及智能家居与工业应用。在M7之前,ARM Cortex-M系列内核已推出多款产品:MO、MO+、M3、M4等,在市场上应用极广。
文摘This paper describes a supervisory hierarchical fuzzy controller （SHFC） for regulating pressure in a real-time pilot pressure control system. The input scaling factor tuning of a direct expert controller is made using the error and process input parameters in a closed loop system in order to obtain better controller performance for set-point change and load disturbances. This on-line tuning method reduces operator involvement and enhances the controller performance to a wide operating range. The hierarchical control scheme consists of an intelligent upper level supervisory fuzzy controller and a lower level direct fuzzy controller. The upper level controller provides a mechanism to the main goal of the system and the lower level controller delivers the solutions to a particular situation. The control algorithm for the proposed scheme has been developed and tested using an ARM7 microcontroller-based embedded target board for a nonlinear pressure process having dead time. To demonstrate the effectiveness, the results of the proposed hierarchical controller, fuzzy controller and conventional proportional-integral （PI） controller are analyzed. The results prove that the SHFC performance is better in terms of stability and robustness than the conventional control methods.
