Three-axis Turntable Design And Control Simulation Study

The development of three-axis turntable technology is an important indicator and reflection of a country’s level of industrial automation.A three-axis turntable can simulate the flight attitude of an aircraft in the air and reproduce its dynamic characteristics during flight,providing a reference basis for aircraft design and improvement,thereby reducing development costs and shortening the development cycle.In this study,the structural design of the three-axis turntable was completed using Solidworks.The high-precision servo controller for the turntable was designed based on an improved robust control method,and the control simulation of the turntable was achieved by integrating it with ADAMS.The turntable has advantages such as small size,low cost,and high control accuracy,making it highly valuable and promising for research and application in the aerospace and industrial manufacturing fields.First,the overall design of the turntable was completed according to the design specifications.The structure of the azimuth,elevation,and roll components,as well as the mechanical limit devices,were designed and modeled,and the assembly model was created in Solidworks.In addition,the parameters of key components such as the three-axis servo system motor,reducer,bearings,and encoder were calculated and selected,and the statics and accuracy of the turntable frame were analyzed using ANSYS.Second,a permanent magnet synchronous motor(PMSM)was chosen as the driver for the turntable.The control principle of PMSM was analyzed,and the principles and implementation of space vector pulse width modulation(SVPWM)were studied.The mathematical model of the PMSM was established.Next,research was conducted on the active disturbance rejection control algorithm,and improvements were made to the nonlinear function in the ADRC controller to obtain a continuously smooth improved nonlinear function.Based on this function,an extended state observer was redesigned,and an improved second-order ADRC position servo control system for the PMSM was established.Finally,in order to comprehensively validate the performance of the turntable,electromechanical co-simulation experiments were conducted on the azimuth,pitch,and roll axes using the interaction capability between ADAMS and MATLAB/S.The simulation results were analyzed.The results demonstrate that the dynamic characteristics of the three-axis turntable under the improved active disturbance rejection control(ADRC)are superior to those under PID control,exhibiting stronger disturbance rejection capability and shorter settling time,leading to better control performance.The effectiveness of the improved ADRC controller has been verified.This study provides effective guidance for future electromechanical co-simulation technology and can enhance the design and manufacturing efficiency of three-axis turntables to a certain extent,in accordance with academic paper standards.