In this paper,we review some existing control methodologies for complex systems with particular emphasis on those that are near critical.Due to the shortage of the classical control theory in handling complex systems,...In this paper,we review some existing control methodologies for complex systems with particular emphasis on those that are near critical.Due to the shortage of the classical control theory in handling complex systems,the reviewed control methods are mainly associated with machine learning techniques,game-theoretical approaches,and sparse control strategies.Additionally,several interesting and promising directions for future research are also proposed.展开更多
The speed and cost of A/D conversion are conflict to each other. As micro-controller speed is increasing and its internal function is improving, full utilization of its internal resource can dramatically increase A/D ...The speed and cost of A/D conversion are conflict to each other. As micro-controller speed is increasing and its internal function is improving, full utilization of its internal resource can dramatically increase A/D conversion speed and without compromising conversion quality. MSP430F11x1 series micro-controller is exploited to increase A/D conversion speed.展开更多
为了实现卫星平台的超静,针对卫星平台上最大的扰振来源,研究磁悬浮控制力矩陀螺的极微振动控制问题.通过对磁悬浮高速转子、径向磁轴承进行建模与分析,设计了基于振动传递终端力检测的磁悬浮控制力矩陀螺(magnetic suspension control ...为了实现卫星平台的超静,针对卫星平台上最大的扰振来源,研究磁悬浮控制力矩陀螺的极微振动控制问题.通过对磁悬浮高速转子、径向磁轴承进行建模与分析,设计了基于振动传递终端力检测的磁悬浮控制力矩陀螺(magnetic suspension control moment gyro,MSCMG)低扰振控制方法.该方法通过测量高速转子产生的振动力与振动传递终端所受的振动力之间的传递矩阵,根据传递矩阵计算补偿电流以抑制MSCMG的同频振动力.仿真与微振动实验结果表明:在MSCMG低速框架锁定的情况下,提出的补偿控制方法使MSCMG的同频振动力降低了97.5%.该方法有助于实现MSCMG的极微振动控制,并最终实现卫星平台超静.展开更多
Novel compact DC-DC converters for pocket micro-controller systems are discussed in the paper, which are based on switched capacitors and inductorless,consequently are more suitable for being hybridized. The new conve...Novel compact DC-DC converters for pocket micro-controller systems are discussed in the paper, which are based on switched capacitors and inductorless,consequently are more suitable for being hybridized. The new converters en-able the pocket microcontroller system to be powered by only one +12V source,while +5V and -12V are converted from the +12V source. The basic princi-ple, voltage ratio, efficiency and ripples are analysed. Experiment and SPICE simulation are also given, which show positive results.展开更多
基金supported in part by the Shanghai Municipal Science and Technology,China Major Project(No.2021SHZDZX0100)in part by the National Natural Science Foundation of China(Nos.62073241,62088101,62103303)+1 种基金in part by the Shanghai Municipal Commission of Science and Technology,China Project(No.19511132101)and in part by the Fundamental Research Funds for the Central Universities(No.22120200077)。
文摘In this paper,we review some existing control methodologies for complex systems with particular emphasis on those that are near critical.Due to the shortage of the classical control theory in handling complex systems,the reviewed control methods are mainly associated with machine learning techniques,game-theoretical approaches,and sparse control strategies.Additionally,several interesting and promising directions for future research are also proposed.
文摘The speed and cost of A/D conversion are conflict to each other. As micro-controller speed is increasing and its internal function is improving, full utilization of its internal resource can dramatically increase A/D conversion speed and without compromising conversion quality. MSP430F11x1 series micro-controller is exploited to increase A/D conversion speed.
文摘为了实现卫星平台的超静,针对卫星平台上最大的扰振来源,研究磁悬浮控制力矩陀螺的极微振动控制问题.通过对磁悬浮高速转子、径向磁轴承进行建模与分析,设计了基于振动传递终端力检测的磁悬浮控制力矩陀螺(magnetic suspension control moment gyro,MSCMG)低扰振控制方法.该方法通过测量高速转子产生的振动力与振动传递终端所受的振动力之间的传递矩阵,根据传递矩阵计算补偿电流以抑制MSCMG的同频振动力.仿真与微振动实验结果表明:在MSCMG低速框架锁定的情况下,提出的补偿控制方法使MSCMG的同频振动力降低了97.5%.该方法有助于实现MSCMG的极微振动控制,并最终实现卫星平台超静.
文摘Novel compact DC-DC converters for pocket micro-controller systems are discussed in the paper, which are based on switched capacitors and inductorless,consequently are more suitable for being hybridized. The new converters en-able the pocket microcontroller system to be powered by only one +12V source,while +5V and -12V are converted from the +12V source. The basic princi-ple, voltage ratio, efficiency and ripples are analysed. Experiment and SPICE simulation are also given, which show positive results.
