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An Intelligent Multi-Sensor Variable Spray System with Chaotic Optimization and Adaptive Fuzzy Control.

Lepeng Song1, Jinpen Huang1, Xianwen Liang1

  • 1School of Electrical Engineering, Chongqing University of Science and Technology, Chongqing 401331, China.

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Summary
This summary is machine-generated.

This study introduces an intelligent control system for variable spray applications, significantly enhancing precision and efficiency. The new method optimizes droplet size and reduces medicine waste for better plant care.

Keywords:
adaptive fuzzy controlchaos optimizationdata analysisdouble closed-loop controlmulti-sensor measurementvariable spray

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Area of Science:

  • Agricultural Engineering
  • Control Systems
  • Precision Agriculture

Background:

  • Variable spray systems face challenges like low sensitivity, inertia, hysteresis, and nonlinearity.
  • Controlling variable spray droplet size is difficult, impacting efficiency and resource use.

Purpose of the Study:

  • To develop a novel intelligent double closed-loop control system for multi-sensor based variable spray applications.
  • To improve the accuracy, stability, and dynamic performance of variable spray systems.

Main Methods:

  • Implemented a double closed-loop control strategy with chaotic optimization and adaptive fuzzy logic.
  • Utilized a Bang-Bang relay controller for system speed and adaptive fuzzy nonlinear PID for accuracy.
  • Employed multiple sensors (pressure and flow rate) for system state measurement.

Main Results:

  • Chaotic optimized controller showed a 0.9s rise time and 1.5s adjustment time, with 2.67% overshoot.
  • Experimental results demonstrated an optimal spray pressure of 0.3 MPa and flow rate of 0.08 m³/h.
  • Achieved an effective droplet rate of 89.4%, compared to 81.3% with conventional PID control.

Conclusions:

  • The proposed chaotically optimized composite controller significantly enhances the dynamic performance of variable spray systems.
  • The intelligent control system achieves precise control over spray droplets, minimizing medicine usage and maximizing deposition.
  • Satisfactory control results were achieved, indicating the system's effectiveness for precision agriculture.