| The main purpose of this design is to realize the automation requirements of the rabbit feeding process,and to design an automatic feeding line based on a PLC control system.Among them,the automatic feeding trolley strictly meets the requirements of timing,fixed point and quantitative in the feeding process,and the work efficiency is significantly improved.The automatic control system of the feeding line is researched and designed from the following aspects:(1)Propose the design concept of the automatic feeding trolley control system this time,and list the equipment,systems and structural principles of the feeding trolley.A real-time speed control scheme is added to the traditional feeding equipment to implement different control actions under different working conditions,which makes the system run more stably while saving a lot of time,which greatly increases the efficiency of working time.Design and verify the dynamic parameters of the trolley,prove that the designed equipment as a whole meets the dynamic requirements,and calculate the vehicle speed range and motor frequency range of the control system this time.In Solidworks and Auto CAD,the structure design and material setting of the feeding line guide rail test bench are carried out,and the stress analysis is performed to determine that the physical performance of the test bench meets the actual use requirements.(2)Design the operating curve scheme and braking scheme of the feeding trolley,and conduct a detailed study on the braking scheme of the control system.Taking the automatic feeding trolley as the research object,the system of the whole vehicle is made according to the trolley parameters in MATLAB/Simulink.The dynamic system was modeled,and a deceleration braking scheme with a frequency converter and an electromagnetic brake working together was designed for this equipment to extend the service life of the equipment and meet the precise point demand in the feeding process.Compared with the braking scheme using electromagnetic brake alone,the two braking scheme systems are simulated.The results after analysis are displayed that the overall stability and economic efficiency of the trolley using the frequency converter for the two-stage speed-regulating parking scheme are obviously better.It is a braking system solution using electromagnetic brakes.The frequency conversion braking scheme is used as the equipment braking deceleration scheme,and the overall operating frequency curve of the feeding trolley under the experimental conditions is designed.(3)Select the electrical equipment of the feeding trolley system,and configure the communication between the PLC,the host computer and the inverter in the STEP7 Microwin software.Set the working process of the automatic control mode of the feeding line,and design the subroutines of the system initialization module and frequency conversion communication module,manual control module,automatic control module,logic processing module,and fault alarm module respectively.The man-machine interface of the touch screen is designed in the MCGSE configuration environment,and the variable communication is linked to the PLC,so as to directly click the touch screen to control the feeding line system.(4)Assemble the electrical equipment used,connect all relevant devices to communicate in their own way,plan the debugging process to conduct experimental testing and debugging on the electrical equipment,and the final equipment is stable overall,alarms in time,and can achieve the pre-set action Claim. |
