为提高交流伺服系统性能,设计了一种二自由度控制(two degree of freedom control,2DOFC)结构,在简单反馈控制结构的基础上,增加设定值微分跟踪器,保证系统能够更快更好地跟踪输入,反馈控制器的设计将滑模控制(sliding mode control,SMC...为提高交流伺服系统性能,设计了一种二自由度控制(two degree of freedom control,2DOFC)结构,在简单反馈控制结构的基础上,增加设定值微分跟踪器,保证系统能够更快更好地跟踪输入,反馈控制器的设计将滑模控制(sliding mode control,SMC)与内模控制(internal model control,IMC)相结合,其形式为内模PI控制器与切换鲁棒滑模控制器的线性组合,可使系统具有良好的扰动抑制能力。考虑到纯微分跟踪器的实现困难和对高频噪声的放大作用,采用不完全微分进行近似,同时反馈控制器可根据系统期望性能指标进行解析整定。仿真结果表明,所提方法不仅使得交流伺服系统具有较好的设定值跟踪和扰动抑制特性,而且对于系统参数摄动具有更好的鲁棒性。展开更多
The star tracker is an optical attitude sensor with extremely high accuracy, the structure of which is mainly composed of the baffle, the lens, the image detector, and the processing unit, and it has been widely used ...The star tracker is an optical attitude sensor with extremely high accuracy, the structure of which is mainly composed of the baffle, the lens, the image detector, and the processing unit, and it has been widely used in satel- lites To realize attitude determination from the weak star captured by the image detector of the star tracker,展开更多
文摘为提高交流伺服系统性能,设计了一种二自由度控制(two degree of freedom control,2DOFC)结构,在简单反馈控制结构的基础上,增加设定值微分跟踪器,保证系统能够更快更好地跟踪输入,反馈控制器的设计将滑模控制(sliding mode control,SMC)与内模控制(internal model control,IMC)相结合,其形式为内模PI控制器与切换鲁棒滑模控制器的线性组合,可使系统具有良好的扰动抑制能力。考虑到纯微分跟踪器的实现困难和对高频噪声的放大作用,采用不完全微分进行近似,同时反馈控制器可根据系统期望性能指标进行解析整定。仿真结果表明,所提方法不仅使得交流伺服系统具有较好的设定值跟踪和扰动抑制特性,而且对于系统参数摄动具有更好的鲁棒性。
基金supported by the State Key Laboratory of Precision Instrument Measurement,Tsinghua University under the financial support of the National Natural Science Foundation of China(NSFC)(Nos.61377012,51522505,61605099,and 61505094)
文摘The star tracker is an optical attitude sensor with extremely high accuracy, the structure of which is mainly composed of the baffle, the lens, the image detector, and the processing unit, and it has been widely used in satel- lites To realize attitude determination from the weak star captured by the image detector of the star tracker,
