The Modeling And Simulation Research Of FAST Node Control System Based On The Theory Of The MRAC

FAST(Five-hundred-meter Aperture Spherical Radio Telescope),the most sensitive and internationally largest spherical radio telescope,has significant impact on deep space exploration,environmental research and national security.Since researching on the FAST node displacement control theoretically and practically impact the design and implementation of FAST in industrial control fields,efficient utilization of the FAST node displacement control to realize deformation adjustment and the whole network has been the focus of much of the research.This article uses the model reference adaptive control(MRAC)theoretical design of the FAST node control system,solves FAST nodal displacements low accuracy,poor stability,anti-interference and poor process parameters as well as shortcomings.First,summarizes the theory of the adaptive control and has carried on the study and research of he model reference adaptive control(MRAC)system structure and algorithm design.The second,analyzes FAST active reflector system structure and strategy of active reflection surface deformation,focusing on FAST active reflector system,control principle and the factors influencing the accuracy of the displacement,at the same time analyzes the node displacement control system and network topology;through analyzing the structure of the node position servo system,the mathematical model of FAST node control system was deduced.This provides a theoretical mathematical model for the back of the MRAC modeling.The last,has carried on the control system design and simulation of FAST node based on the theory of the MRAC.According to the design method of the controller based on Nareudra error model for the design of the adaptive controller,Including the structure of the adaptive controller design,the selection of reference model and the adaptive law.We has carried on the simulation of the control system model,by using Simulink simulation tool and the simulation results are analyzed.Results show the feasibility and validity of FAST node control system based on the theory of the MRAC.The key technology of this article is to build mathematical models applied and controlled object model reference adaptive theory.The innovation of this article is implement of FAST node displacement control for the first time by using the theory of MRAC,solves the slow speed,instability system and low accuracy for FAST node displacement control.This article has carried on the design and simulation of the FAST node control system based on the theory of the MRAC.Through data provided by the observatory in miyun shrinkage ratio model,the simulation results proved the feasibility and effectiveness of the control system.it will help FAST active reflective surface control research have important practical significance.