Research On Two-dimensional Correction Control System And Algorithm Based On Embedded Platform

Based on the two-dimensional correction principle,this paper studies the control strategy of the two-dimensional trajectory correction projectile,designs a two-dimensional correction control system based on DSP,proposes a specific solution method for attitude solution,and implements the control system hardware platform Construction and software architecture design.The performance of the designed two-dimensional correction system was tested by setting up a horizontal experimental turntable.This article analyzes the correction principle of trajectory correction and related research development status at home and abroad.The overall control strategy of this design was formulated,and the scheme of the correction mechanism consisting of a cross fixed duck rudder and a permanent magnet motor was determined.Based on the overall correction strategy,an algorithm study was carried out.For the calculation of the roll angle of the rear projectile,combined with the traditional filtering method,an improved geomagnetic filter algorithm was proposed,and the roll angle calculation method was simplified.The rudder speed is measured in real time,and the incremental photoelectric encoder is used to realize the steering angle calculation.In terms of hardware design,a design scheme using F28335 as the main control chip of the embedded platform is proposed,and the correction function is implemented by carrying various modules.At the same time,the circuit schematic diagram and PCB drawing are performed,and various interfaces are reasonably configured.The four main modules: main controller and storage module,signal processing module,power supply module and steering gear control module give design ideas and detailed circuit analysis,and make parameter comparison for device selection.In the software design,the software system framework of the correction system was established through the CCS platform.Different program designs were adopted for different stages in the control strategy.A program flowchart was given for the analysis of the position of the projectile.Solve,adjust the PWM according to the correction position to realize the correction mechanism action,and describe the data storage,data recovery and interruption procedures in the system in detail.Finally,after the software and hardware,hardware-in-the-loop simulation platform,and signal tests are qualified,the designed two-dimensional modified control system is subjected to multiple experiments through the established experimental platform to test the speed adjustment capability and angle calculation accuracy of the steering gear.The angle was stopped for experiments.The final experimental results show that the designed two-dimensional modified control system has good performance,control accuracy meets requirements,and has the characteristics of low power consumption,miniaturization,and high stability,which has certain engineering practical value.