Nonlinear 2-DOF PID controller optimized by artificial lemming algorithm for robust engine speed regulation in spark-ignition systems
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View abstract on PubMed
Summary
This summary is machine-generated.A new nonlinear two-degree-of-freedom (2-DOF) PID controller optimized by the artificial lemming algorithm (ALA) significantly improves engine speed regulation in spark-ignition (SI) systems. This ALA-based controller offers superior accuracy and robustness against disturbances compared to other metaheuristic methods.
Area Of Science
- Control Systems Engineering
- Automotive Engineering
- Artificial Intelligence in Engineering
Background
- Precise engine speed regulation in spark-ignition (SI) internal combustion engines (ICEs) is challenging due to nonlinearities and disturbances.
- Conventional proportional-integral-derivative (PID) controllers struggle with fast tracking and robust disturbance rejection in dynamic conditions.
Purpose Of The Study
- To develop and optimize a nonlinear two-degree-of-freedom (2-DOF) PID controller for enhanced SI engine speed regulation.
- To evaluate the performance of the artificial lemming algorithm (ALA) in optimizing controller gains for improved accuracy and robustness.
Main Methods
- A detailed mathematical model of an SI engine was used, including throttle, manifold pressure, combustion, and crankshaft dynamics.
- The artificial lemming algorithm (ALA), a bio-inspired metaheuristic, was employed to optimize the 2-DOF PID controller gains.
- A multi-term cost function minimizing overshoot, steady-state error, and stability coefficients was used for optimization.
Main Results
- The ALA demonstrated superior convergence stability compared to other tested metaheuristic algorithms.
- The ALA-optimized controller achieved significantly reduced rise time (0.3114 s), settling time (2.4313 s), and negligible overshoot (0.0027%).
- Exceptional steady-state error (2.62 × 10⁻¹¹%) and disturbance rejection capability (speed deviation < 0.5%) were achieved.
Conclusions
- The ALA-based nonlinear 2-DOF PID controller provides a robust, accurate, and energy-efficient solution for SI engine speed regulation.
- The proposed controller outperforms existing metaheuristic-based approaches in accuracy and reliability.
- The adaptive and scalable design is suitable for real-time embedded systems, hybrid powertrains, and other nonlinear control applications.
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