Design Of A Solar Tracking Servo Control System

With the rapid development of our society,the increase of urban resident population and the intensity of the distribution of buildings,the demand for lighting in the living environment has also grew sharply.Solar energy as a clean renewable energy which has been attached great importance to and widely used around the world can meet the urban living groups for the living environment of the urgent needs of light.How to solve the building back users' demand of light has became one of the main research problems.In order to solve the problem of solar lighting demand,this paper designs a solar tracking servo control system to solve the lighting problem of building back side.The main contents of this paper are as follows:Firstly,with the analysis of the existing solar tracking strategy,proposing the tracking strategy which combined the trajectory tracking and the photoelectric tracking dual mode realize the demand of solar lighting for the target location all day.Secondly,based on the analysis of the specific role of the trajectory tracking strategy in the system,a modified algorithm based on Lagrange interpolation is proposed to solve the problem of coarse tracking and initial location.The simulation results show that the error and validity of the method and the classical method.Thirdly,in order to realize the photoelectric tracking,a photoelectric sensor is designed.Through image processing real-time detection of the sun reflects light in order to realize closed loop control system,and through the experimental analysis verify the validity of the designed photoelectric sensor.Fourthly,in order to ensure that the target position of the solar reflected light remain unchanged during the process of solar motion,a biaxial servo tracking system with fuzzy PID as the control algorithm is designed.The effectiveness of the method is verified by simulation.Fifthly,the hardware and software design of the system are completed by using Raspberry Pi as the main controller.Finally,the feasibility of the tracing method based on Lagrange interpolation and the rationality of hardware platform and program design of photoelectric sensor Detection accuracy and dual-axis servo tracking system is verified by the system experiment.