Dual-Mode Based Sliding Mode Control Approach for Nonlinear Chemical Processes

Obando, Camila; Rojas, Rubén; Ulloa, Francisco Javier Jara; Camacho, Oscar

doi:10.1021/acsomega.2c08201

Cited by 7 publications

(4 citation statements)

References 57 publications

(138 reference statements)

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“…The mixing tank process is a nonlinear system , and consists of the simultaneous entry of the hot flow W 1 ( t ) and the cold flow W 2 ( t ) into the process with temperatures T 1 ( t ) and T 2 ( t ), respectively, as shown in Figure . The output T 4 ( t ) is the temperature of the mixture measured at a point 125 ft downstream of the mixing tank.…”

Section: Resultsmentioning

confidence: 99%

A Hybrid Control Framework for Chemical Processes with Long Time Delay: Theory and Experiments

Di Teodoro,

Herrera,

Rincon

et al. 2024

ACS Omega

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This paper proposes a hybrid control framework based on internal model concepts, sliding mode control methodology, and fractional-order calculus theory. As a result, a modified Smith predictor (SP) is proposed for nonlinear systems with significant delays. The particular predictive approach enhances the sliding mode control (SMC) controller's transient responses for dead-time processes, and the SMC gives the predictive structure robustness for model mismatches by combining the previous methods with fractional order concepts; the result is a dynamical sliding mode controller. A numerical example is considered to evaluate the performance of the proposed approach, where a step change, external disturbance, and parametric uncertainty test are performed. A real application in the TCLab Arduino kit is presented; the proposed method presented good performance with a little amount of chattering, and in the disturbance rejection case, the overshoot increased with an aggressive response; in both cases, better tuning parameters can improve the process response and the controller action.

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Section: Resultsmentioning

confidence: 99%

A Hybrid Control Framework for Chemical Processes with Long Time Delay: Theory and Experiments

Di Teodoro,

Herrera,

Rincon

et al. 2024

ACS Omega

Self Cite

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“…These performance measures, ISE, IAE, ITSE, and ITAE, are also commonly utilized to fine-tune the PID controller's parameters [83]. ISE quantifies the integral of the squared error between the set point and process variable over the entire control interval, while IAE measures the integral of the absolute error over time [84]. ITSE combines ISE and the integral of the squared controller output over time.…”

Section: Min Itae = Minmentioning

confidence: 99%

Optimizing Load Frequency Control in Standalone Marine Microgrids Using Meta-Heuristic Techniques

2023

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Integrating renewable resources into the electrical systems of marine vessels achieves the dual goal of diversifying energy resources and reducing greenhouse gas emissions. The presence of intermittent renewable sources and sudden nonlinear load changes can cause frequency deviations in isolated hybrid marine microgrids. To address this issue, the paper proposes a conventional PID (proportional–integral–derivative)-controller-based LFC (load frequency controller) which is optimized by meta-heuristic optimization algorithms, namely, PSO (particle swarm optimization), GWO (grey wolf optimization) and hybrid PSO-GWO. The proposed LFC was designed using transfer functions of various microgrid components, with ITAE (integral time absolute error) and ITSE (integral time square error) serving as performance indices. The proposed LFC’s validation was performed through HIL (hardware-in-loop) real-time simulation using a DS 1104 R&D controller board, with simulation results showing the better performance of the optimized frequency response compared to the nonoptimized LFC controller in terms of rise time, fall time, slew rate and overshoot. The hybrid PSO-GWO algorithm performs better than the other optimization algorithms. The simulation results demonstrate the stability and robustness of the proposed controller. In summary, the proposed PID-controller-based LFC can regulate frequency deviation in standalone hybrid marine microgrids effectively.

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“…The performance of the process response depends on the chosen sliding surface. How the SMC works depends on the sliding surface, and changing the sliding surface can change how well the SMC works [3,15,36,37]. The sliding surface selected from [12], shown in Equation (20), is employed:…”

Section: Controller Synthesismentioning

confidence: 99%

“…The FODUP model was expressed in Equation (16). Once K, τ, and t 0 are known, K D and λ can be calculated using Equations ( 32) and (37), respectively. Meanwhile, K p and t f are determined by trial and error until the controller provides an adequate response.…”

Section: Biochemical Reactor Modelmentioning

confidence: 99%

An Internal Model Based—Sliding Mode Control for Open-Loop Unstable Chemical Processes with Time Delay

et al. 2023

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This paper presents a dynamic sliding mode control (DSMC) for open-loop unstable chemical or biochemical processes with a time delay. The controller is based on the sliding mode and internal model control concepts. The proposed DSMC has an internal P/PD controller to provide systems with disturbance rejection. An identification method approximates the open-loop unstable nonlinear process to a first-order delayed unstable process (FODUP). The reduced-order model(FODUP) is used to synthesize the new controller. The performance of the controller is stable and satisfactory despite nonlinearities in the operating conditions due to set-point and process disturbance changes. In addition, the performance analysis of the control schemes was evaluated based on various indices and transient characteristics, including the integral of squared error (ISE), the total variation of control effort (TVu), the maximum overshoot (Mp), and the settling time (ts). Finally, the process output and the control action for all controllers are compared using the nonlinear process as the real plant.

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Dual-Mode Based Sliding Mode Control Approach for Nonlinear Chemical Processes

Cited by 7 publications

References 57 publications

A Hybrid Control Framework for Chemical Processes with Long Time Delay: Theory and Experiments

A Hybrid Control Framework for Chemical Processes with Long Time Delay: Theory and Experiments

Optimizing Load Frequency Control in Standalone Marine Microgrids Using Meta-Heuristic Techniques

An Internal Model Based—Sliding Mode Control for Open-Loop Unstable Chemical Processes with Time Delay

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