Reliable speed control of a permanent magnet DC motor using fault-tolerant H-bridge

Ahmed, Soban; Amin, Arslan Ahmed; Wajid, Zaeema; Ahmad, Faizan

doi:10.1177/1687814020970311

Cited by 20 publications

(21 citation statements)

References 13 publications

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“…In [17], a fault-tolerant H-bridge system is proposed for DC motor speed control with the PWM technique only resulting in a very large harmonics content of about 48.3% in the output waveform which makes the proposed solution not feasible from the power quality point of review through its highly reliable. The solution proposed in [31], FT-CHB is proposed but it is only for five levels that also results in a high THD of 20.83% which is not up to the mark.…”

Section: Resultsmentioning

confidence: 99%

“…The CHBMI's dependability is critical. Because the existing flow direction for open-fault and short-fault is different, the CHBMI requires safety fuses to distinguish between the two [17]. A control technique for a single-phase cascaded "off-grid" solar panel storage system has been presented, as well as a fault-tolerant system in the event of PV failure.…”

Section: Literature Reviewmentioning

confidence: 99%

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Design of Active Fault-Tolerant Control System for Multilevel Inverters to Achieve Greater Reliability With Improved Power Quality

Alqarni

2022

IEEE Access

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Modern renewable energy systems mostly utilize multilevel converter applications for improved power quality and grid synchronization purposes. A multilevel converter is an electrical device that may offer several amounts of voltage levels at the output in order to make the output more comparable to a pure sine wave. The integrity of the multilevel converter depends on the reliability of individual switches such that the converter will collapse in case of faults in these switches. In this paper, a novel 7-level Fault-Tolerant Cascaded H-Bridge Multilevel Inverter (FT-CHB-MLI) has been proposed that offers high reliability with improved power quality. A dedicated Fault Detection and Isolation (FDI) unit has been built to diagnose the faulty switch and replace it with a standby redundant switch. Total harmonic distortion and the determination of a normalized output voltage factor are employed for fault diagnosis. The Phase Disposition Pulse Width Modulation (PD-PWM) technique has been utilized for switching due to its superior performance as compared to other conventional techniques. This early fault detection method not only identified the issues but also performed preventative actions to keep the system healthy and stable. The proposed system was tested on the MATLAB / Simulink environment to verify its performance. The simulation results demonstrated that the THD has been reduced to almost 18% with a significant increase in reliability with advanced fault-tolerant architecture consisting of FDI units. The reliability analysis was carried out using Markov chains that also showed its increased reliability. A comparison of the proposed work with literature was also carried out to demonstrate its superior performance with increased reliability. Inverter Fault Diagnosis Techniques. INDEX TERMS

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Section: Resultsmentioning

confidence: 99%

Section: Literature Reviewmentioning

confidence: 99%

Design of Active Fault-Tolerant Control System for Multilevel Inverters to Achieve Greater Reliability With Improved Power Quality

Alqarni

2022

IEEE Access

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“…The module can provide the final fault determinations for the nonlinear fault-tolerant controller in the CIFTC system for turbofan engines. Remark 5: The expression of the stack decision model in (11) means that the previous fault determination is changed only if sf consecutive temporary diagnosis results are consistent. The selection of the stack length needs to consider the acceptable fault-tolerance time of the control system for turbofan engines.…”

Section: B Stack Decision Modelmentioning

confidence: 99%

“…Redundancy is mainly divided into hardware redundancy and analytical redundancy [9]. In hardware redundancy, multiple backup sensors or actuators are used to perform the same task thereby preventing the failure of the system [10], such as dual redundancy [11], triple modular redundancy [12], and modified triple redundancy [13]. Owing to increasing the cost, weight, and physical size, hardware redundancy is often not an option for turbofan engines.…”

Section: Introductionmentioning

confidence: 99%

CNN-Based Intelligent Fault-Tolerant Control Design for Turbofan Engines With Actuator Faults

Cheng

Liu

2021

IEEE Access

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In this paper, the problem of fault-tolerant control is investigated for turbofan engines with actuator faults. The controller involvement has repressed the effects of actuator faults on the controlled outputs of turbofan engines, making fault-tolerant control difficult. To solve this problem, the internal gaspath data of turbofan engines is introduced to provide conducive fault information. Besides, the useful property of the convolution neural network (CNN) is explored and utilized in fault-tolerant control. Based on the analysis of actuator faults, by using the Lyapunov stability and L 2-gain like theorems, a novel CNN-based intelligent fault-tolerant control system for turbofan engines is proposed, including a CNNbased fault diagnosis module and a nonlinear fault-tolerant controller with corresponding reconfiguration unit. The CNN-based intelligent fault-tolerant control system has the advantages of reducing the accuracy requirements of the mathematical description of turbofan engines. Furthermore, the proposed system can diagnose actuator faults and reduce the adverse effects of actuator faults on turbofan engines. Finally, simulation results are presented to demonstrate the efficiency of the designed method. INDEX TERMS CNN-based intelligent fault-tolerant control, actuator faults, gas-path data, fault diagnosis, nonlinear fault-tolerant controller, turbofan engines.

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“…In the AFTCS, the fault is detected and isolated by the fault detection and isolation (FDI) Unit, after which the reconfiguration of the controller is carried out [ 12 , 13 ]. The block diagram for the AFTCS is depicted in Figure 3 .…”

Section: Introductionmentioning

confidence: 99%

Advanced Fault-Tolerant Anti-Surge Control System of Centrifugal Compressors for Sensor and Actuator Faults

Alsuwian

Amin

Maqsood

et al. 2022

Sensors

Self Cite

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Faults frequently occur in the sensors and actuators of process machines to cause shutdown and process interruption, thereby creating costly production loss. centrifugal compressors (CCs) are the most used equipment in process industries such as oil and gas, petrochemicals, and fertilizers. A compressor control system called an anti-surge control (ASC) system based on many critical sensors and actuators is used for the safe operation of CCs. In this paper, an advanced active fault-tolerant control system (AFTCS) has been proposed for sensor and actuator faults of the anti-surge control system of a centrifugal compressor. The AFTCS has been built with a dedicated fault detection and isolation (FDI) unit to detect and isolate the faulty part as well as replace the faulty value with the virtual redundant value from the observer model running in parallel with the other healthy sensors. The analytical redundancy is developed from the mathematical modeling of the sensors to provide estimated values to the controller in case the actual sensor fails. Dual hardware redundancy has been proposed for the anti-surge valve (ASV). The simulation results of the proposed Fault-tolerant control (FTC) for the ASC system in the experimentally validated CC HYSYS model reveal that the system continued to operate in the event of faults in the sensors and actuators maintaining system stability. The proposed FTC for the ASC system is novel in the literature and significant for the process industries to design a highly reliable compressor control system that would continue operation despite faults in the sensors and actuators, hence preventing costly production loss.

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Reliable speed control of a permanent magnet DC motor using fault-tolerant H-bridge

Cited by 20 publications

References 13 publications

Design of Active Fault-Tolerant Control System for Multilevel Inverters to Achieve Greater Reliability With Improved Power Quality

Design of Active Fault-Tolerant Control System for Multilevel Inverters to Achieve Greater Reliability With Improved Power Quality

CNN-Based Intelligent Fault-Tolerant Control Design for Turbofan Engines With Actuator Faults

Advanced Fault-Tolerant Anti-Surge Control System of Centrifugal Compressors for Sensor and Actuator Faults

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