In order to suppress the periodic interference of the continuous rotary electro-hydraulic servo motor,this paper makes the motor tracking the periodic signals with high accuracy,and improves the influence of friction ...In order to suppress the periodic interference of the continuous rotary electro-hydraulic servo motor,this paper makes the motor tracking the periodic signals with high accuracy,and improves the influence of friction interference to the performance of continuous rotary electro-hydraulic servo motor.The mathematic model of the electro-hydraulic position servo system of the continuous rotary motor was established,and the compound control method was adopted based on the repetitive control,feed forward and PID to suppress the friction interference.Through the simulation,the result confirms that the compound control method decreases the tracking error of the system,increases the robust performance of the system and improves the performance of the continuous rotary electro-hydraulic servo motor.展开更多
Complicated product QFD system design information including design and manufacturing,operation and maintenance as well as relative supply information,all are tightly related to the product life cycle cooperative desig...Complicated product QFD system design information including design and manufacturing,operation and maintenance as well as relative supply information,all are tightly related to the product life cycle cooperative design and the process of establishing the QFD system.In the early stage of product design,we can only get the fuzzy and unreliable information.With design going,the fuzzy and unreliable information become less and less.The defect of the traditional QFD is not deal with the fuzzy contents very well.Adopt database class encapsulation and fuzzy inference technology,and then discuss the realization of QFD system based on VFP database.The structure of the fuzzy QFD system based on database class's encapsulation is built and the work flow of fuzzy algorithm based on VFP software is presented.In the analysis of fuzzy QFD process,fuzzy inference is adopted.A developed prototype system and an example have verified some presented techniques and the research results are the basis of the future development.展开更多
基金supported by the Postdoctoral Project of Heilongjiang Province
文摘In order to suppress the periodic interference of the continuous rotary electro-hydraulic servo motor,this paper makes the motor tracking the periodic signals with high accuracy,and improves the influence of friction interference to the performance of continuous rotary electro-hydraulic servo motor.The mathematic model of the electro-hydraulic position servo system of the continuous rotary motor was established,and the compound control method was adopted based on the repetitive control,feed forward and PID to suppress the friction interference.Through the simulation,the result confirms that the compound control method decreases the tracking error of the system,increases the robust performance of the system and improves the performance of the continuous rotary electro-hydraulic servo motor.
基金Funded by the National Natural Science Foundation of China(Grant No.50375071),the National Natural Science Foundation of Jiangsu Province Education Department(Grant No.2004JD028J)and the Science Foundation of Zhenjiang City(Grant No.2004JD020J)
文摘Complicated product QFD system design information including design and manufacturing,operation and maintenance as well as relative supply information,all are tightly related to the product life cycle cooperative design and the process of establishing the QFD system.In the early stage of product design,we can only get the fuzzy and unreliable information.With design going,the fuzzy and unreliable information become less and less.The defect of the traditional QFD is not deal with the fuzzy contents very well.Adopt database class encapsulation and fuzzy inference technology,and then discuss the realization of QFD system based on VFP database.The structure of the fuzzy QFD system based on database class's encapsulation is built and the work flow of fuzzy algorithm based on VFP software is presented.In the analysis of fuzzy QFD process,fuzzy inference is adopted.A developed prototype system and an example have verified some presented techniques and the research results are the basis of the future development.
