This paper presents a voltage controller for a 12/8 switched reluctance generator (SRG). SR machines have a robust with simple structure because they have no windings or permanent magnets on the rotor, so they are cap...This paper presents a voltage controller for a 12/8 switched reluctance generator (SRG). SR machines have a robust with simple structure because they have no windings or permanent magnets on the rotor, so they are capable of working at high speed application and at rough condition. However, due to nonlinear nature, doubly salient poles, time variant parameters, and non-ideal current waveform, The SRG output voltage inherently contains ripples. The proposed voltage controller is based on fuzzy logic that is very efficient over uncertainty and parameter variations. The effectiveness of the proposed control method is verified by comparing the obtained result with that of a PI-controller.展开更多
This study investigates the robust feedback set stabilization of switched logic control networks(SLCNs)with state-dependent uncertain switching and control constraints.First,based on the properties of the semi-tensor ...This study investigates the robust feedback set stabilization of switched logic control networks(SLCNs)with state-dependent uncertain switching and control constraints.First,based on the properties of the semi-tensor product of matrices and the vector representation of logic,an SLCN with state-dependent uncertain switching and control constraints is expressed in algebraic form.Second,an input transformation and a switching model are constructed to transfer the original SLCN into one with a free control input and arbitrary switching.The equivalence between the set stabilizability of the original SLCN and that of the resulting SLCN is established.Based on such equivalence,the authors propose a necessary and sufficient condition for robust feedback set stabilizability.Finally,an example is presented to demonstrate the application of the results obtained.展开更多
在HL-2M装置逻辑控制系统中,不但对数据通信的实时性、网络化和控制系统的安全性要求很高,并且要求在整个逻辑控制系统出现故障后可对引起故障或导致等离子体放电实验失败的原因进行分析,前者通过应用新一代实时以太网通信标准PROFINET...在HL-2M装置逻辑控制系统中,不但对数据通信的实时性、网络化和控制系统的安全性要求很高,并且要求在整个逻辑控制系统出现故障后可对引起故障或导致等离子体放电实验失败的原因进行分析,前者通过应用新一代实时以太网通信标准PROFINET和西门子自动化设备搭建实时通信平台来保证,后者则通过高精度SOE(Sequence of Events)模块来实现;在实验测试平台的结果表明,该设计满足了系统需求,具有实时性、安全性和事故追忆功能。展开更多
三相多功能光伏逆变器的独立逆变功能一般采用基于d-q坐标变换的双闭环控制策略。在没有负载电流前馈的条件下,独立光伏逆变器抗负载扰动能力差,超调严重。针对这一问题提出一种非线性控制方法,根据电压的偏差通过逻辑切换改变电感电流...三相多功能光伏逆变器的独立逆变功能一般采用基于d-q坐标变换的双闭环控制策略。在没有负载电流前馈的条件下,独立光伏逆变器抗负载扰动能力差,超调严重。针对这一问题提出一种非线性控制方法,根据电压的偏差通过逻辑切换改变电感电流内环反馈大小,该方法相当于改变了系统的等效阻尼,从而改善系统的动态性能。利用PSIM和MATLAB进行联合仿真并根据仿真分析结果设计100 k W三相光伏独立逆变器,仿真和试验结果验证了所提方法的有效性。展开更多
基金National Natural Science Foundation of P.R.China(60574027)Opening Project of National Laboratory of Indus-trial Control Technology of Zhejiang University(0708001)
文摘This paper presents a voltage controller for a 12/8 switched reluctance generator (SRG). SR machines have a robust with simple structure because they have no windings or permanent magnets on the rotor, so they are capable of working at high speed application and at rough condition. However, due to nonlinear nature, doubly salient poles, time variant parameters, and non-ideal current waveform, The SRG output voltage inherently contains ripples. The proposed voltage controller is based on fuzzy logic that is very efficient over uncertainty and parameter variations. The effectiveness of the proposed control method is verified by comparing the obtained result with that of a PI-controller.
基金supported by the National Natural Science Foundation of China under Grant Nos.61873284,61321003,and 62373374.
文摘This study investigates the robust feedback set stabilization of switched logic control networks(SLCNs)with state-dependent uncertain switching and control constraints.First,based on the properties of the semi-tensor product of matrices and the vector representation of logic,an SLCN with state-dependent uncertain switching and control constraints is expressed in algebraic form.Second,an input transformation and a switching model are constructed to transfer the original SLCN into one with a free control input and arbitrary switching.The equivalence between the set stabilizability of the original SLCN and that of the resulting SLCN is established.Based on such equivalence,the authors propose a necessary and sufficient condition for robust feedback set stabilizability.Finally,an example is presented to demonstrate the application of the results obtained.
文摘在HL-2M装置逻辑控制系统中,不但对数据通信的实时性、网络化和控制系统的安全性要求很高,并且要求在整个逻辑控制系统出现故障后可对引起故障或导致等离子体放电实验失败的原因进行分析,前者通过应用新一代实时以太网通信标准PROFINET和西门子自动化设备搭建实时通信平台来保证,后者则通过高精度SOE(Sequence of Events)模块来实现;在实验测试平台的结果表明,该设计满足了系统需求,具有实时性、安全性和事故追忆功能。
文摘三相多功能光伏逆变器的独立逆变功能一般采用基于d-q坐标变换的双闭环控制策略。在没有负载电流前馈的条件下,独立光伏逆变器抗负载扰动能力差,超调严重。针对这一问题提出一种非线性控制方法,根据电压的偏差通过逻辑切换改变电感电流内环反馈大小,该方法相当于改变了系统的等效阻尼,从而改善系统的动态性能。利用PSIM和MATLAB进行联合仿真并根据仿真分析结果设计100 k W三相光伏独立逆变器,仿真和试验结果验证了所提方法的有效性。