The adaptive variable structure guidance (AVSG) is robust to target maneuvers, but apt to induce unwanted chattering .Fuzzy technique is used to implementthe AVSGfor eliminating chattering ,and then a new guidance m...The adaptive variable structure guidance (AVSG) is robust to target maneuvers, but apt to induce unwanted chattering .Fuzzy technique is used to implementthe AVSGfor eliminating chattering ,and then a new guidance method called fuzzy AVSGis produced .The fuzzy AVSGis applied to the space interception problem .Simulationresults demonstratethe effectiveness ofthe new guidance method .展开更多
Based on consideration of the differential relations between the immeasurable variables and measurable variables in electro-hydraulic servo system,adaptive dynamic recurrent fuzzy neural networks(ADRFNNs) were employe...Based on consideration of the differential relations between the immeasurable variables and measurable variables in electro-hydraulic servo system,adaptive dynamic recurrent fuzzy neural networks(ADRFNNs) were employed to identify the primary uncertainty and the mathematic model of the system was turned into an equivalent linear model with terms of secondary uncertainty.At the same time,gain adaptive sliding mode variable structure control(GASMVSC) was employed to synthesize the control effort.The results show that the unrealization problem caused by some system's immeasurable state variables in traditional fuzzy neural networks(TFNN) taking all state variables as its inputs is overcome.On the other hand,the identification by the ADRFNNs online with high accuracy and the adaptive function of the correction term's gain in the GASMVSC make the system possess strong robustness and improved steady accuracy,and the chattering phenomenon of the control effort is also suppressed effectively.展开更多
文摘The adaptive variable structure guidance (AVSG) is robust to target maneuvers, but apt to induce unwanted chattering .Fuzzy technique is used to implementthe AVSGfor eliminating chattering ,and then a new guidance method called fuzzy AVSGis produced .The fuzzy AVSGis applied to the space interception problem .Simulationresults demonstratethe effectiveness ofthe new guidance method .
基金Project(60634020) supported by the National Natural Science Foundation of China
文摘Based on consideration of the differential relations between the immeasurable variables and measurable variables in electro-hydraulic servo system,adaptive dynamic recurrent fuzzy neural networks(ADRFNNs) were employed to identify the primary uncertainty and the mathematic model of the system was turned into an equivalent linear model with terms of secondary uncertainty.At the same time,gain adaptive sliding mode variable structure control(GASMVSC) was employed to synthesize the control effort.The results show that the unrealization problem caused by some system's immeasurable state variables in traditional fuzzy neural networks(TFNN) taking all state variables as its inputs is overcome.On the other hand,the identification by the ADRFNNs online with high accuracy and the adaptive function of the correction term's gain in the GASMVSC make the system possess strong robustness and improved steady accuracy,and the chattering phenomenon of the control effort is also suppressed effectively.
