A set of new all-direction regulation indices (ADRI) is suggested using the accustomedclassical geometrical terminology. With the advantage of the previous indices, they aresuitable for both simple-input simple-output...A set of new all-direction regulation indices (ADRI) is suggested using the accustomedclassical geometrical terminology. With the advantage of the previous indices, they aresuitable for both simple-input simple-output systems and multi-input multi-output systems.Different from the tracking indices type, ADRI summarises the whole regulation specifica-tions of the system for various possible disturbances from all directions in the state space.The characters of the new and the old indices are analyzed. The algorithm of ADRI valuesis given. It is found that both the ADRI and the robustness index of a system simultaneouslyrequire the eigenvectors to be as orthonormal as possible. As a result a functional index isobtained that can improve the robustness and the dynamic regulation performance simulta-neously.展开更多
The existence of strong interference is the main constraint factor, which influences the detection performance of a signal extraction system. For a sonar with large array the problem of anti-interferences in all-direc...The existence of strong interference is the main constraint factor, which influences the detection performance of a signal extraction system. For a sonar with large array the problem of anti-interferences in all-direction has not been solved yet because of the requirements of over-long time delay line and the over high input- output rate. A method proposed in this paper can be used in the design of adaptive signal processing system with large array for suppressing the strong interference in all-direction. This is a combined architecture of adaptive noise canceller (ANC)and a programmable DICANNE system.When the incident angle between signal θS and interference θI is small, the ANC system is used. When θs-θI is large, a programmable DICANNE system, with rising sampling rate, is used, so that an all-directional anti-interferences system can be obtained. The structure described in this paper is easy to implement in hardware by using DSP chips.The design diagram and implementable method in hardware is presented.展开更多
基金Project supported by the National Natural Science Foundation of China.
文摘A set of new all-direction regulation indices (ADRI) is suggested using the accustomedclassical geometrical terminology. With the advantage of the previous indices, they aresuitable for both simple-input simple-output systems and multi-input multi-output systems.Different from the tracking indices type, ADRI summarises the whole regulation specifica-tions of the system for various possible disturbances from all directions in the state space.The characters of the new and the old indices are analyzed. The algorithm of ADRI valuesis given. It is found that both the ADRI and the robustness index of a system simultaneouslyrequire the eigenvectors to be as orthonormal as possible. As a result a functional index isobtained that can improve the robustness and the dynamic regulation performance simulta-neously.
文摘The existence of strong interference is the main constraint factor, which influences the detection performance of a signal extraction system. For a sonar with large array the problem of anti-interferences in all-direction has not been solved yet because of the requirements of over-long time delay line and the over high input- output rate. A method proposed in this paper can be used in the design of adaptive signal processing system with large array for suppressing the strong interference in all-direction. This is a combined architecture of adaptive noise canceller (ANC)and a programmable DICANNE system.When the incident angle between signal θS and interference θI is small, the ANC system is used. When θs-θI is large, a programmable DICANNE system, with rising sampling rate, is used, so that an all-directional anti-interferences system can be obtained. The structure described in this paper is easy to implement in hardware by using DSP chips.The design diagram and implementable method in hardware is presented.
