Design and experiment of mushroom-stick density control system for mushroom bagging machine
A mushroom-stick density control system for mushroom bagging machine was designed to address the issue of poor control over mushroom-stick density.By analyzing the working principle of the mushroom bagging machine,a mathematical model for the density control system of mushroom-sticks was established;The fuzzy control was combined with traditional PID control based on the physical characteristics of mushroom culture medium bulk materials;Simulation models for traditional PID control systems and fuzzy PID control systems were established in Simulink and simulation analysis was conducted;The designed mushroom-stick density control system was loaded onto the mushroom bagging machine for on-site testing.The simulation results show that the response time of the fuzzy PID control system is 0.81 s,and the response time to interference is 0.093 s;Compared with traditional PID control,fuzzy PID control system is 53%and 20%faster in response speed and anti-interference ability,respectively,and shows good control effect under different preset values.The on-site test results show that the fuzzy PID control has good control over the density of mushroom-sticks,with qualification rates of 97.852%,97.923%,and 94.152%at different preset values,and coefficients of variation of 2.324%,2.252%,and 2.649%,respectively,meeting the requirements of mushroom-stick production.The research provides a new solution for the control of mushroom bagging machines.
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