We use two appropriate bounded invertible operators to define a controlled frame with optimal frame bounds. We characterize those operators that produces Parseval controlled frames also we state a way to construct nea...We use two appropriate bounded invertible operators to define a controlled frame with optimal frame bounds. We characterize those operators that produces Parseval controlled frames also we state a way to construct nearly Parseval controlled frames. We intro- duce a new perturbation of controlled frames to obtain new frames from a given one. Also we reduce the distance of frames by appropriate operators and produce nearly dual frames from two given frames which are not dual frames for each other.展开更多
A new model of roving frame FA467,which uses four frequency inverters to replace the complex mechanical transmission,is discussed.A Neuron-PID is designed to reduce the effect of various parametric variations such as ...A new model of roving frame FA467,which uses four frequency inverters to replace the complex mechanical transmission,is discussed.A Neuron-PID is designed to reduce the effect of various parametric variations such as load inertia.To ensure the constant spinning tension all over the spinning process,a feedforward controller using iterative learning control algorithm is designed to avoid disturbances caused by changes of temperature,humidity and so on.The simulation result is shown to illustrate the effectiveness of the proposed algorithm,and now the roving frame FA467 has been developed successfully.展开更多
文摘We use two appropriate bounded invertible operators to define a controlled frame with optimal frame bounds. We characterize those operators that produces Parseval controlled frames also we state a way to construct nearly Parseval controlled frames. We intro- duce a new perturbation of controlled frames to obtain new frames from a given one. Also we reduce the distance of frames by appropriate operators and produce nearly dual frames from two given frames which are not dual frames for each other.
基金Supported by the High Technology. Research and Development Program of China （No. 2005AA103310） and the National Natural Science Foundation of China （No. 60202006）.
文摘A new model of roving frame FA467,which uses four frequency inverters to replace the complex mechanical transmission,is discussed.A Neuron-PID is designed to reduce the effect of various parametric variations such as load inertia.To ensure the constant spinning tension all over the spinning process,a feedforward controller using iterative learning control algorithm is designed to avoid disturbances caused by changes of temperature,humidity and so on.The simulation result is shown to illustrate the effectiveness of the proposed algorithm,and now the roving frame FA467 has been developed successfully.
