Study On Electronic Control System Of Theodolite Optical Target Simulator

Nowadays,all kinds of optical measurement tasks of man-machine,missile,carrier rocket and other relevant aircraft tests in China are mainly completed by large-caliber photoelectric theodolite.With the rapid development of science and technology in China,the relevant test frequency is increasing year by year,and the tasks undertaken by photoelectric theodolite are increasing day by day.Therefore,it is of great significance to realize the multi-function and high-precision operation of the special target simulator for photoelectric theodolite by means of electric control.In this paper,the electronic control system of a special optical target simulator for photoelectric theodolite is studied in detail.This paper synthesizes the working principle,actual working environment,optical target characteristics and other related factors of the photoelectric theodolite system,and gives the design scheme of the electronic control system based on a lot of reading and analysis of various relevant mature systems and technologies at home and abroad.In order to achieve the goal of multi-function and high-precision operation of the simulator,the electronic control system of the photoelectric theodolite target simulator is divided into three parts: the master control subsystem,the data communication subsystem and the light and focus subsystem.On the basis of this,a careful and meticulous research has been conducted on the relevant content.First of all,in order to make the electronic control system easy to operate,have the ability to export control command,through reading lots of domestic and foreign relevant technical literature and reference,this article will master subsystem design function orientation in the help of data communication subsystem to command scheduling simulator focusing subsystem that move light,make the light switch,light path telescopic lens,lens group and a series of important functional operation system.In order to make its function have the basic design basis,the hardware part design includes the main control computer,the display,the communication interface card,the network card and so on equipment;In order to achieve the specific design purpose,the software part of the master control subsystem includes system software and application software,which respectively complete data transmission,processing,display,control and other functions.By the combination of hardware and software,themain control subsystem becomes the portal of the simulator's output control command.Secondly,in order to integrate and process the information received and received by the electronic control system of the simulator and all parts of the photoelectric theodolite,avoid data confusion,make the electronic control system of the simulator work in an orderly manner and increase the stability of the electronic control system,this paper designs a data communication subsystem within the electronic control system.In order to achieve the design purpose,through the detailed analysis of relevant technical data at home and abroad,a large number of comparison of various processors on the market,as well as the comprehensive consideration of the task internship demand undertaken by the subsystem.The design of the data communication subsystem consists of the main control board and the external interface board.The main function is to receive the control command and boot data of the master computer,and forward the control command and boot data.Data processing,screening,confirm the signal source and gathering the measure data and status information of each system,and provide the master computer,complete source switch,focusing on the console panel potentiometer,such as A/D acquisition such as read status information,and will be read by key information and data collected by the information sent to the related subsystem,through panel display of each subsystem of receiving and sending the data information.Make the data communication subsystem become the internal information communication medium of the simulator and play the role of internal information intermediary.Thirdly,for the design of the electronic control subsystem of the simulator,the ultimate purpose is to enable it to control the parts of the splitter units of the simulator.Therefore,the design of the optical dimming and focusing system of the simulator is the key of the whole electronic control system.Based on the detailed analysis of the functions of each part of the simulator and the detailed study of relevant literature,this paper has positioned the main design functions of the dimming and focusing system as: receiving control commands and information;Complete the light source switch,focus,change times,diaphragm switch and other practical work.After a great deal of comparison and reference to similar terminal controlled products at home and abroad,the internal design of the subsystem is divided into the front end and the back end.The internal and optical fiber connection of the system is defined as the front end,and the motor connection is defined as the back end.Thefront-end design function is as follows: get the digital control command by switching to electricity.Through the comprehensive comparison of various cpus on the market and the consideration of the actual working direction of the simulator,DSP and FPGA are selected as the command recognition core to identify various specific functions.Through to the domestic and foreign similar product information found A lot of reading,to achieve high precision control,the control must be A closed loop,therefore,the back-end design physical connection for the closed loop,the first through the motor drive module is connected with the motor,connected to the potentiometer and A/D sampling interface,control motor movement,the movement as A result,the potentiometer feedback after receiving the parsing of switch control command,aperture,etc.One-way control cannot meet the high accuracy control,through the potentiometer feedback need to know when in fact change,potentiometer complete analog to digital conversion A \ D,the results are packaging,light signal,the data communication is translated into A serial port to recognize the signal to the main control computer,at this point to get the feedback value,the simulator function to achieve the final design.Finally,the design working environment of the electronic control system of the simulator was tested through high and low temperature tests and testing machines,so as to verify whether it could adapt to various complex working environments.In order to verify the accuracy and stability of the electronic control system,the design parameters of the simulator were tested.The test results show that the electronic control system can meet the relevant design requirements,realize the relevant design functions,and work reliably and stably.