New modified Smith predictor scheme for integrating and unstable processes with time delay

Liu, Tao; Cai, Yunze; D, Gu; Zhang, Wensheng

doi:10.1049/ip-cta:20041232

Cited by 117 publications

(135 citation statements)

References 15 publications

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“…Moreover, other procedures can be used to tune CðsÞ and MðsÞ. Another solution to this problem can be obtained using the idea presented in Liu et al (2005). In this work the authors use a slightly different structure that includes a stabilising controller, as it is shown in Fig.…”

Section: The Improved Solutionsmentioning

confidence: 97%

Dead-time compensators: A survey

Normey‐Rico

Camacho

2008

Control Engineering Practice

230

107

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Section: The Improved Solutionsmentioning

confidence: 97%

Dead-time compensators: A survey

Normey‐Rico

Camacho

2008

Control Engineering Practice

230

107

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“…To avoid this unstable zero-pole cancellation, the control structure shown in Fig.1 should be changed. Several alternatives are available in literature to cope with unstable processes with dead-time (see, for example, [2,12,11,16,17]). …”

Section: Extension To Unstable Siso Systemsmentioning

confidence: 99%

“…At each iteration j, γ j is fixed and W 1 and W 2 are replaced by W 1 /γ j and W 2 /γ j . Then, a feasibility problem is solved under the convex constraints (11). If the problem is feasible, γ j+1 is chosen smaller than γ j .…”

Section: Primary Controller Designmentioning

confidence: 99%

Robust Smith Predictor Design for Time-Delay Systems with $$H_{\infty }$$ H ∞ Performance

Oliveira¹,

Nicoletti²,

Karimi³

2016

Recent Results on Time-Delay Systems

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A new method for robust fixed-order H ∞ controller design for uncertain time-delay systems is presented. It is shown that the H ∞ robust performance condition can be represented by a set of convex constraints with respect to the parameters of a linearly parameterized primary controller in the Smith predictor structure. Therefore, the parameters of the primary controller can be obtained by convex optimization. The proposed method can be applied to stable SISO and MIMO models with uncertain dead-time and with multimodel and frequency-dependent uncertainty. It is also shown that how the design method can be extended to unstable SISO models. The design of robust gain-scheduled dead-time compensators is also investigated. The performance of the method is illustrated for both SISO and MIMO systems by simulation examples.

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“…The limitation is that they usually cannot be used with non-minimum phase, unstable plants with integral behavior. The classical Smith predictor has been modified ( [29], [30], [31]) to deal with unstable plants. If all the controlled variables (i.e.…”

Section: Control Structure With Delay Compensationmentioning

confidence: 99%

Controlling the Double Rotary Inverted Pendulum with Multiple Feedback Delays

Casanova

Salt

Pizá

et al. 2012

INT J COMPUT COMMUN

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Abstract:The aim of this work is the development and implementation of a control structure for the double rotary inverted pendulum, suitable to be used in a Networked Control System environment. Delays are quite common in this kind of systems and, when controlling multivariable plants, it is possible that different delays are applied to the multiple inputs and outputs of them. A control structure that allows compensating individually each one of the multiple loop delays would be useful when one of these delays changes. Inverted pendulums are quite sensitive to delays and for this reason are appropriated plants to be used in these conditions. The control structure is developed modifying the control in no-delay conditions with a generalized predictor able to deal with unstable and non-minimum plants as the chosen one is. The proposed structure has been simulated and implemented to control a real double rotary inverted pendulum.

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New modified Smith predictor scheme for integrating and unstable processes with time delay

Cited by 117 publications

References 15 publications

Dead-time compensators: A survey

Dead-time compensators: A survey

Robust Smith Predictor Design for Time-Delay Systems with $$H_{\infty }$$ H ∞ Performance

Controlling the Double Rotary Inverted Pendulum with Multiple Feedback Delays

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