| In modern warfare,the biggest threats often come from the air.Airborne weaponry usually includes optoelectronic precision guided missiles,precision guided bombs,aircraft,reconnaissance or attack drones.These systems have the common feature of photoelectric sighting and observation systems.The laser-to-air search radar we studied detects the targets,tracks targets,and provides basic measurement data for destroying targets by detecting the optical systems of these threatening weapons.The control system is the soul of laser search radar.It is the guarantee for rapid detection,precise positioning and precise tracking of radar targets.This paper mainly studies the basic methods of implementing high-performance control systems,designing circuit design and circuit control software,and researching control.Study the composition of the control system,the cooperation between the control system and the scanning system,the cooperation method between the control system and the host computer system,and develop the related software and hardware to support the precise and fast operation of the control system,and establish an experimental verification system.In view of the above mentioned problems,this paper focuses on the topic of "Design of Control System for Air Search Lidar".It mainly studies the composition of its control system,the cooperation between the control system and the scanning system,the cooperation between the control system and the host computer system,and the design of the phase light soft and hardware that can support the precise and fast operation of the entire control system.Related experiments,based on the analysis of experimental phenomena and experimental data,have obtained some valuable results and conclusions.It laies the foundation for the development of air search for laser radar.First and foremost,this paper studies the overall design of the entire air-searching lidar control system,and establishes the "cat-eye effect" as the detection principle for the target with photoelectric sensor(such as CCD camera).The double galvanometer scanning system is constructed,and several scanning methods commonly used in double galvanometer scanning are analyzed.By comparing the efficiency of various methods,the scanning mode of the spiral scanning is determined.Secondly,on this basis,the hardware design of the entire control system was studied and designed.The 6210 H galvanometer,the 671 two-phase hybrid stepping motor and the matched motor servo drive board were selected to form the double galvanometer scanning system.Using the STM32-F103ZET6 MCU as the core control part,the SPI communication mode is used to control the scanning system to perform corresponding actions through the DAC8563 digital/analog conversion module outputting the driving voltage of-10V~+10V.The APD silicon avalanche photodiode is used as a detector to receive the laser echo signal,and the detected related information is transmitted to the upper computer through the STM32 single chip microcomputer.Then,software part of the whole control system is researched and designed,the software overall architecture is established,the software driver is written to the relevant hardware circuit in the MDK5 compilation environment,and the "five-point scan tracking" algorithm is designed to drive the hardware to execute the purpose of tracking of goals.Last but not least,according to the designed hardware circuit and the corresponding software module,the STM32 single-chip microcomputer controlled galvanometer is used for scanning deflection experiments,target positioning experiments and tracking experiments on moving targets.According to the experimental data,the developed control system was analyzed,and the direction of further improvement was given. |
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