I-PD Controller Design based on Robust Viewpoint

Diep, Vu Thu; Hung, Phan Duy; Su, Nguyen Tien

doi:10.1109/irce.2019.00013

Cited by 3 publications

(3 citation statements)

References 12 publications

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“…1 is proven to be useful in improving the closed loop control performance, there exists a general problem caused by the derivative kick, that is, an instant response of the controller that generates a huge spike in the designed control signal U (s) for a step input command. Even though, many researches focus on the improvement of overshoot and settling time [10]- [12] on FOPID controller design, the spike in the control signal is often overlooked. Such a spike is harmful to the control systems and may result in damage to the system devices.…”

Section: Derivative Kick Problemmentioning

confidence: 99%

“…Most literatures are focused on the controlling aspect of the plant with a reduced error management and not much on the peak values of the control signal leaving the PID controller. There is always a compromise between overshoot, settling time, and the voltage spike, called the derivative kick, coming from the derivative control from the PID controller [10]- [12]. This voltage spike can be attributed to sudden changes to the setpoint, which will give rise to an impulse signal coming from the controller output.…”

mentioning

confidence: 99%

“…The output signal coming from the controller is then fed to control elements such as: electric motors, electronics or control valves, which may be damaged by such sudden high voltage spikes. To mitigate this derivative kick, several researchers have applied the parallel controller structures such as the PI-PD [10], I-PD [11], [12], and the most recent fractionalorder proportional integral-derivative (FOPI-D) controller [13]. The PI-PD controller design provides a good overall control of unstable and resonant system's responses to setpoint changes.…”

mentioning

confidence: 99%

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Mitigation of Derivative Kick Using Time-Varying Fractional-Order PID Control

Lendek

Tan

2021

IEEE Access

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In this paper, a novel approach for the design of a fractional order proportional integral derivative (FOPID) controller is proposed. This design introduces a new time-varying FOPID controller to mitigate a voltage spike at the controller output whenever a sudden change to the setpoint occurs. The voltage spike exists at the output of the proportional integral derivative (PID) and FOPID controllers when a derivative control element is involved. Such a voltage spike may cause a serious damage to the plant if it is left uncontrolled. The proposed new FOPID controller applies a time function to force the derivative gain to take effect gradually, leading to a time-varying derivative FOPID (TVD-FOPID) controller, which maintains a fast system response and significantly reduces the voltage spike at the controller output. The time-varying FOPID controller is optimally designed using the particle swarm optimization (PSO) or genetic algorithm (GA) to find the optimum constants and time-varying parameters. The improved control performance is validated through controlling the closed-loop DC motor speed via comparisons between the TVD-FOPID controller, traditional FOPID controller, and time-varying FOPID (TV-FOPID) controller which is created for comparison with all three PID gain constants replaced by the optimized time functions. The simulation results demonstrate that the proposed TVD-FOPID controller not only can achieve 80% reduction of voltage spike at the controller output but also is also able to keep approximately the same characteristics of the system response in comparison with the regular FOPID controller. The TVD-FOPID controller using a saturation block between the controller output and the plant still performs best according to system overshoot, rise time, and settling time.

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Section: Derivative Kick Problemmentioning

confidence: 99%

mentioning

confidence: 99%