Design Of Shipborne Radar Stability Platform

When the ships are sailing at sea,ships are always produced roll and pitch movements due to wind,waves and other environments,so the normal work of the radar equipment is affected inevitably.As a device placed on the motion carrier,stable platform has the function of isolating the disturbance cased by motion carrier.Therefore,the marine radar stable platform has a important significance.Firstly,this thesis analyzes the influence of hull movement on the detection capability and azimuth resolution of marine radar equipment,and provides the theoretical basis for the design of marine radar stable platform,and then draws the purpose and goal of this thesis.According to the requirements and function analysis of the radar stabilization platform,the overall scheme of the stable platform system is determined,and the design of the unit including the execution unit,the mechanical unit,the main control unit and the attitude information collection unit is completed.The attitude information collection unit focuses on the detection and analysis of the original data of the sensor and completes the zero deviation correction of the gyroscope.For the static performance of the accelerometer and poor dynamic performance,gyroscope dynamic performance and long-time-accumulating error characteristics,the use of both complementary advantages can improve the accuracy of the angle.Through the analysis and comparison of the three methods of complementary filtering,Kalman filter and quaternion method,the quaternion method is used to calculate the attitude angle.Then,on the basis of the overall scheme design of the stable platform system,in order to verify the rationality of the design scheme,a stable platform prototype based on the above design is installed.According to the size of the stable platform prototype and the layout of each device,the size of the main control board is determined,and the design of the system hardware is completed,including the design of the system hardware schematic diagram,the construction of the smallest system,the PCB design and completion of the system board welding and debugging.Based on the characteristics of stabilized platform system,completed the software system design,realize the communication between the attitude sensors and the microprocessor,and the effective control of the stepper motor.Finally,the performance experiment and dynamic experiment of the stable platform prototype were carried out in the laboratory environment.The results show that the upper part of the stable platform can be kept within the range of 3° when the below part of the stable platform is disturbed,and the adjustment effect satisfies the requirements.