Digital valve control servo system is studied in this paper. In order to solve the system problems of poor control precision and slow response time,a CMAC-PID( cerebellar model articulation controller-PID) compound co...Digital valve control servo system is studied in this paper. In order to solve the system problems of poor control precision and slow response time,a CMAC-PID( cerebellar model articulation controller-PID) compound control method is proposed. This compound controller consists of two components: one is a traditional PID for the feedback control to guarantee stability of the system; the other is the CMAC control algorithm to form a feed-forward control for achieving high control precision and short response time of the controlled plant. Then the CMAC-PID compound control method is used in the digital valve control servo system to improve its control performance. Through simulation and experiment,the proposed CMAC-PID compound control method is superior to the traditional PID control for enhancing stability and robustness,and thus this compound control can be used as a new control strategy for the digital valve control servo system.展开更多
Fused deposition molding is an advanced kind of rapid prototyping technology. On the accuracy of the forming process, the research on the temperature of the molding material is based on the analysis of the forming par...Fused deposition molding is an advanced kind of rapid prototyping technology. On the accuracy of the forming process, the research on the temperature of the molding material is based on the analysis of the forming parameters. The influence of the tenlperature of the molding material on the specimen is reasonably described by the actual forming part and the finite element analysis model. The experimental results show that the temperatur（ of the molding material is less affected by the temperature of the molding material in a certain range. This will lay the theoretical foundation for the formation of the molding technology in the future展开更多
基金Supported by the National Natural Science Foundation of China(No.51505412)the Independent Study Program for Young Teachers in Yanshan University(No.14LGB004)
文摘Digital valve control servo system is studied in this paper. In order to solve the system problems of poor control precision and slow response time,a CMAC-PID( cerebellar model articulation controller-PID) compound control method is proposed. This compound controller consists of two components: one is a traditional PID for the feedback control to guarantee stability of the system; the other is the CMAC control algorithm to form a feed-forward control for achieving high control precision and short response time of the controlled plant. Then the CMAC-PID compound control method is used in the digital valve control servo system to improve its control performance. Through simulation and experiment,the proposed CMAC-PID compound control method is superior to the traditional PID control for enhancing stability and robustness,and thus this compound control can be used as a new control strategy for the digital valve control servo system.
文摘Fused deposition molding is an advanced kind of rapid prototyping technology. On the accuracy of the forming process, the research on the temperature of the molding material is based on the analysis of the forming parameters. The influence of the tenlperature of the molding material on the specimen is reasonably described by the actual forming part and the finite element analysis model. The experimental results show that the temperatur（ of the molding material is less affected by the temperature of the molding material in a certain range. This will lay the theoretical foundation for the formation of the molding technology in the future
