The objective in this presentation is to introduce some of the unique properties and applications of nullors in active circuit analysis and designs. The emphasis is to discuss the role nullors can play in symbolic rep...The objective in this presentation is to introduce some of the unique properties and applications of nullors in active circuit analysis and designs. The emphasis is to discuss the role nullors can play in symbolic representation of transfer functions. To show this we adopt the topological platform for the circuit analysis and use a recently developed Admittance Method (AM) to achieve the Sum of Tree Products (STP), replacing the determinant and cofactors of the Nodal Admittance Matrix (NAM) of the circuit. To construct a transfer function, we start with a given active circuit and convert all its controlled sources and I/O-ports to nullors. Now, with a solid nullor circuit (passive elements and nullors) we first eliminate the passive elements through AM operations. This produces the STPs. Second, the all-nullor circuit is then used to find the signs or the STPs. Finally, the transfer function (in symbolic, if chosen) is obtained from the ratio between the STPs.展开更多
针对主轴实际速度与主轴指令速度S之间存在较大误差的问题,以FANUC Oi Mate-TC数控系统实验培训平台为例,当主轴转速在800 r/min时,误差控制在3%以内。根据模拟主轴速度误差调整方法,调整速度误差。实践验证:采用模拟主轴速度误差调整方...针对主轴实际速度与主轴指令速度S之间存在较大误差的问题,以FANUC Oi Mate-TC数控系统实验培训平台为例,当主轴转速在800 r/min时,误差控制在3%以内。根据模拟主轴速度误差调整方法,调整速度误差。实践验证:采用模拟主轴速度误差调整方法,有效解决了主轴实际速度与主轴指令速度S误差较大的问题。这对模拟主轴广泛应用于中、低档数控机床,主轴速度精度控制有较高的工程应用价值。展开更多
文摘The objective in this presentation is to introduce some of the unique properties and applications of nullors in active circuit analysis and designs. The emphasis is to discuss the role nullors can play in symbolic representation of transfer functions. To show this we adopt the topological platform for the circuit analysis and use a recently developed Admittance Method (AM) to achieve the Sum of Tree Products (STP), replacing the determinant and cofactors of the Nodal Admittance Matrix (NAM) of the circuit. To construct a transfer function, we start with a given active circuit and convert all its controlled sources and I/O-ports to nullors. Now, with a solid nullor circuit (passive elements and nullors) we first eliminate the passive elements through AM operations. This produces the STPs. Second, the all-nullor circuit is then used to find the signs or the STPs. Finally, the transfer function (in symbolic, if chosen) is obtained from the ratio between the STPs.
文摘针对主轴实际速度与主轴指令速度S之间存在较大误差的问题,以FANUC Oi Mate-TC数控系统实验培训平台为例,当主轴转速在800 r/min时,误差控制在3%以内。根据模拟主轴速度误差调整方法,调整速度误差。实践验证:采用模拟主轴速度误差调整方法,有效解决了主轴实际速度与主轴指令速度S误差较大的问题。这对模拟主轴广泛应用于中、低档数控机床,主轴速度精度控制有较高的工程应用价值。
