Automatic Control of Fluids in Electropneumatic System
DOI:
https://doi.org/10.29114/ajtuv.vol9.iss2.365Keywords:
Electropneumatic systems, PI control, Fluid flow regulation, Leakage detection, Microcontroller-based automation, Proportional valve control, Adaptive controlAbstract
This paper presents the design, implementation, and evaluation of an automatic flow control system for electropneumatic applications, incorporating a proportional-integral (PI) control algorithm and an integrated leakage detection mechanism. The proposed system employs a microcontroller-based architecture for real-time pressure monitoring and adaptive valve regulation, using a single pressure sensor and a 4–20 mA transmitter interface. A 5/2 directional valve is utilized for flow routing, while proportional throttle control is achieved through a PWM-driven solenoid valve. The control algorithm dynamically adjusts the output in response to pressure deviations, ensuring stable and accurate regulation within a 0–6 bar range. An automated leak detection logic is embedded to identify abnormal air losses by monitoring persistent high output signals and deviation errors beyond a predefined threshold. Experimental results demonstrate that the system achieves rapid stabilization with minimal steady-state error, maintaining pressure within ±2% of the desired setpoint. Furthermore, the leakage detection functionality effectively isolates fault conditions, enhancing operational safety and energy efficiency. The overall performance validates the practicality of the proposed design as a cost-effective and intelligent solution for industrial pneumatic automation.Downloads
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