A comprehensive review of modified Internal Model Control (IMC) structures and their filters for unstable processes

Ranjan, Anjana; Mehta, Utkal; Saxena, Sahaj

doi:10.1016/j.arcontrol.2023.04.006

Cited by 13 publications

(2 citation statements)

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“…In that case, the control design is not straightforward since it causes an increase in the phase margin. To handle such issues, the Smith predictor (SP) structure has proven a good choice [2]. The direct synthesis (DS) and internal model control (IMC) schemes are mainly used to design the controllers.…”

Section: Introductionmentioning

confidence: 99%

“…The direct synthesis (DS) and internal model control (IMC) schemes are mainly used to design the controllers. A review article comprehensively discussed various IMCs developed with structural changes, limitations, and challenges followed by future motivations [2]. An approach based on SP presented by Uma and Rao [3] has two controllers, one for disturbance rejection and the other for setpoint tracking.…”

Section: Introductionmentioning

confidence: 99%

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Direct synthesis approach to design PDμ${\text{PD}}^\mu$ based smith predictor for integrating plants: Studied on a quadrotor UAV

Ranjan,

Mehta,

Prakash

et al. 2024

The Journal of Engineering

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This article presents a simple yet novel method of designing a fractional‐order proportional derivative (namely, ) controller for all types of integrating plants. Considering the importance of the direct synthesis approach, the method obtains robust closed‐loop performance. The setpoint parameter is obtained using the multi‐optimization Pareto solution, considering the optimal values in control efforts and performance index together. The numerical investigations have shown improved servo and regulatory responses compared to recently published strategies with fractional orders. It is also known that classical PIDs cannot accurately follow a ramp setpoint. A real‐world situation also demands that the reference inputs become an acceleration ramp type. The proposed technique can handle rising ramp setpoints with plant uncertainty and measurement noise. Hardware verification is also performed on a quadrotor minidrone to check for real‐time issues.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%