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Development of an adaptive PID controller for superheating control employing artificial bee colony.

Number: pap. 2365

Author(s) : PANOEIRO N. M., KOURY R. N. N., MACHADO L., et al.

Summary

Electronic Expansion Valves (EEV) have been used in refrigeration systems to replace conventional expansion devices. Their quick response to changes in the operating conditions improves the steady-state superheating, what contributes to increase the system efficiency. EEV are usually used with automatic controllers and among the controllers employed in these devices, the Proportional, Integral and Derivative (PID) controller is the most common. In general, this controller allows for adjustments in the proportional, integral, and differential gains. If these gains are not properly adjusted, the system can display a slow, oscillatory, or unstable closed-loop response, poor disturbance rejection ability and low robustness. In the last decades, several tuning methods for PID controllers were proposed. Among them, the methods based on bio-inspired optimization techniques, in special the Artificial Bee Colony (ABC), are relatively new in PID controller tuning. This work presents an adaptive PID controller to regulate the opening of an EEV. The controller gains were determined using ABC algorithm for each operating point. A dynamic model obtained from experimental tests was used in the controller design. The controller effectiveness was evaluated through computer simulations. Preliminary results indicated that the proposed controller provides good disturbance rejection and set point tracking, and was able to control the superheating efficiently.

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Pages: 8 p.

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Details

  • Original title: Development of an adaptive PID controller for superheating control employing artificial bee colony.
  • Record ID : 30018762
  • Languages: English
  • Source: 2016 Purdue Conferences. 16th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2016/07/11

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