A deterministic approach for design of supervisory control of LPV systems with delay

Linear Parameter Varying (LPV) systems and their control have gained attraction recently as they approximate nonlinear systems with higher order than ordinary linear systems. On the other hand, time delay is an inherent part of various real-life applications. A supervisory control structure is proposed in this paper for LPV systems subject to time delays. In the proposed control structure, a supervisor selects the most suitable controller from a bank of controllers; which desires to enhance the performance of closed-loop system in contrast with using a single robust controller. The analysis is based on the celebrated Smith predictor for time delay compensation and we provide a sufficient condition to assure the stability of the closed-loop switched system in terms of dwell time. Simulations on blood pressure control of hypertension patients in postoperative scenario are used to exemplify the effectiveness of the utilized technique. The operating region of the system is partitioned into five smaller operating regions to construct corresponding robust controllers and perform hysteresis switching amongst them. Simulation results witnessed that the proposed control scheme demonstrated a pressure undershoot less than the desired value of 10 mmHg while the Mean Arterial Pressure (MAP) remains within ±5 mmHg of the desired value.

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Time Delay Compensation for Hardware-in-the-loop Simulation of a Turbojet Engine Fuel Control Unit Using Neural NARX Smith Predictor

International Journal of Control Automation and Systems ◽

10.1007/s12555-019-0875-x ◽

2021 ◽

Author(s):

Mostafa Nasiri ◽

Morteza Montazeri-Gh ◽

Amin Salehi ◽

Elham Bayati

Keyword(s):

Time Delay ◽

Control Unit ◽

Smith Predictor ◽

Engine Fuel ◽

Hardware In The Loop ◽

Delay Compensation ◽

Turbojet Engine ◽

Time Delay Compensation

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Simulation of Time Delay Compensation Controller for a Mobile Robot Using the SMC and Smith Predictor

Intelligent Autonomous Systems 14 - Advances in Intelligent Systems and Computing ◽

10.1007/978-3-319-48036-7_50 ◽

2017 ◽

pp. 687-694

Author(s):

Dong-Hyuk Lee ◽

Jae-Hun Jung ◽

Ha-Neul Yoon ◽

Young-Sik Park ◽

Jang-Myung Lee

Keyword(s):

Time Delay ◽

Mobile Robot ◽

Smith Predictor ◽

Delay Compensation ◽

Time Delay Compensation

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Power control method using time delay compensation scheme based on Smith predictor for flywheel power leveling system

2013 IEEE 10th International Conference on Power Electronics and Drive Systems (PEDS) ◽

10.1109/peds.2013.6527066 ◽

2013 ◽

Cited By ~ 1

Author(s):

K. Tanaka ◽

J. Itoh ◽

S. Matsuo ◽

N. Yamada

Keyword(s):

Time Delay ◽

Power Control ◽

Control Method ◽

Smith Predictor ◽

Compensation Scheme ◽

Delay Compensation ◽

Time Delay Compensation

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Latencies in Power Systems: A Database-Based Time-Delay Compensation for Memory Controllers

Electronics ◽

10.3390/electronics10020208 ◽

2021 ◽

Vol 10 (2) ◽

pp. 208

Author(s):

Alexander Molina-Cabrera ◽

Mario A. Ríos ◽

Yvon Besanger ◽

Nouredine Hadjsaid ◽

Oscar Danilo Montoya

Keyword(s):

Time Delay ◽

Power Systems ◽

Time Delays ◽

Closed Loop ◽

Control Strategies ◽

Area Measurement ◽

Delay Compensation ◽

Measurement Systems ◽

Tie Lines ◽

Time Delay Compensation

Time-delay is inherent to communications schemes in power systems, and in a closed loop strategy the presence of latencies increases inter-area oscillations and security problems in tie-lines. Recently, Wide Area Measurement Systems (WAMS) have been introduced to improve observability and overcome slow-rate communications from traditional Supervisory Control and Data Acquisition (SCADA). However, there is a need for tackling time-delays in control strategies based in WAMS. For this purpose, this paper proposes an Enhanced Time Delay Compensator (ETDC) approach which manages varying time delays introducing the perspective of network latency instead dead time; also, ETDC takes advantage of real signals and measurements transmission procedure in WAMS building a closed-loop memory control for power systems. The strength of the proposal was tested satisfactorily in a widely studied benchmark model in which inter-area oscillations were excited properly.

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Smith Predictor-Taylor Series-Based LQG Control for Time Delay Compensation of Vehicle Semiactive Suspension

Shock and Vibration ◽

10.1155/2019/3476826 ◽

2019 ◽

Vol 2019 ◽

pp. 1-12

Author(s):

Laihua Tao ◽

Shian Chen ◽

Guisheng Fang ◽

Guanghao Zu

Keyword(s):

Time Delay ◽

Taylor Series ◽

Smith Predictor ◽

The Other ◽

Practical Case ◽

Delay Compensation ◽

Horizontal Shift ◽

Lqg Control ◽

Time Delay Compensation ◽

Semiactive Suspension

A Smith predictor-Taylor series-based LQG (STLQG) control to compensate time delay of a semiactive suspension system is newly presented. This control consists of a Taylor series-based LQG (TLQG) control and a Smith predictor based on the TLQG. The TLQG control compensates one half of time delay to decrease magnification from whole time delay compensation. The Smith predictor based on the TLQG compensates the other half to decrease horizontal shift from whole time delay compensation using the Smith predictor-based LQG. Finally, a practical case illustrates advantages of the STLQG control.

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