The Experts below are selected from a list of 246 Experts worldwide ranked by ideXlab platform
Zengqiang Chen - One of the best experts on this subject based on the ideXlab platform.
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Control Strategy and Simulation for Oxygen Supply System with Wearable Oxygen Mask
2019 IEEE International Conference on Industrial Cyber Physical Systems (ICPS), 2019Co-Authors: Fangyou Dong, Xiaolei Zhang, Zengqiang ChenAbstract:Wearable Oxygen Masks play an important role in many fields such as traffic, aviation, medical and health, which is a device worn on the human head. An Oxygen supply system (OSS) with a wearable Mask is even more essential in aeronautical medicine to ensure the safety of pilots. Because of the complexity of the flight environment, having good control performance for pressure regulation is the key to realize the adaptability of Oxygen supply equipment. Based on the application of wearable Oxygen Mask, an OSS with wearable Mask is introduced. A mathematical model of OSS with a voice coil motor drive valve is provided. The improved active disturbance rejection control (ADRC) strategy with feed-forward and two limits is applied to the system according to the dead-zone characteristics of this OSS. The platform is built and mathematical simulations are carried out for the control strategy, comparing with the proportional integral derivative (PID) control algorithm with feed-forward. The results demonstrate that the differential pressure between the Mask and the outside can be within ideal boundaries through both improved ADRC and improved PID. And the improved ADRC has better control effect. Meanwhile it can be resistant to disturbances and the changing breathing frequency.
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ICPS - Control Strategy and Simulation for Oxygen Supply System with Wearable Oxygen Mask
2019 IEEE International Conference on Industrial Cyber Physical Systems (ICPS), 2019Co-Authors: Fangyou Dong, Xiaolei Zhang, Zengqiang ChenAbstract:Wearable Oxygen Masks play an important role in many fields such as traffic, aviation, medical and health, which is a device worn on the human head. An Oxygen supply system (OSS) with a wearable Mask is even more essential in aeronautical medicine to ensure the safety of pilots. Because of the complexity of the flight environment, having good control performance for pressure regulation is the key to realize the adaptability of Oxygen supply equipment. Based on the application of wearable Oxygen Mask, an OSS with wearable Mask is introduced. A mathematical model of OSS with a voice coil motor drive valve is provided. The improved active disturbance rejection control (ADRC) strategy with feed-forward and two limits is applied to the system according to the dead-zone characteristics of this OSS. The platform is built and mathematical simulations are carried out for the control strategy, comparing with the proportional integral derivative (PID) control algorithm with feed-forward. The results demonstrate that the differential pressure between the Mask and the outside can be within ideal boundaries through both improved ADRC and improved PID. And the improved ADRC has better control effect. Meanwhile it can be resistant to disturbances and the changing breathing frequency.
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Pressure Control for Oxygen Supply System Based on ADRC-GPC
2018 37th Chinese Control Conference (CCC), 2018Co-Authors: Fangyou Dong, Yuxin Jiang, Zengqiang ChenAbstract:High-performance of an Oxygen supply system (OSS) is essential to flight quality. But the OSS is sensible to flight conditions and pilots' breathing state, and robustness is necessary. Herein, this paper introduced the mathematical model of the OSS. Then a novel active disturbance rejection generalized predictive control (ADRC-GPC) was applied to the OSS, by combining the technique of active disturbance rejection control (ADRC) and generalized predictive control (GPC). Meanwhile, the simulation results investigated that the pressure of Oxygen Mask can be controlled within the limits of breathing resistance. Finally, the comparison of the simulation between GPC and ADRC-GPC showed that ADRC-GPC was more stable and more effective in lowering breathing resistance than GPC.
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Pressure Regulation for Oxygen Mask Based on Active Disturbance Rejection Control
IEEE Transactions on Industrial Electronics, 2017Co-Authors: Yuxin Jiang, Xiaolei Zhang, Zengqiang ChenAbstract:Safe and reliable automatic pressure regulation for the Oxygen Mask is a primary consideration in an Oxygen supply system (OSS). In order to enhance comfort of users, it is of significance to improve performance of the Oxygen regulator. Based on analyses of the operation principle of electronic Oxygen regulator (EOR), a new EOR is designed, where a proportional flow valve is adopted as the throttle valve, and an active disturbance rejection control (ADRC) strategy is applied to control the throttle valve. The external disturbances and the internal dynamics are estimated using an extended state observer. The dynamic compensation using a state error feedback in each sampling period reduces the plant approximately to an integrator tandem structure. Mathematical simulations are performed for the OSS to evaluate the control method compared with the proportional integral derivative (PID) control approach. The simulation and experimental results demonstrate that the ADRC can achieve precise pressure regulation with superior lower inspiratory resistance than the PID method, considering some environmental disturbances including the user's changing pulmonary ventilation. The work in this paper may be a reference for the EOR design.
Xiaolei Zhang - One of the best experts on this subject based on the ideXlab platform.
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Control Strategy and Simulation for Oxygen Supply System with Wearable Oxygen Mask
2019 IEEE International Conference on Industrial Cyber Physical Systems (ICPS), 2019Co-Authors: Fangyou Dong, Xiaolei Zhang, Zengqiang ChenAbstract:Wearable Oxygen Masks play an important role in many fields such as traffic, aviation, medical and health, which is a device worn on the human head. An Oxygen supply system (OSS) with a wearable Mask is even more essential in aeronautical medicine to ensure the safety of pilots. Because of the complexity of the flight environment, having good control performance for pressure regulation is the key to realize the adaptability of Oxygen supply equipment. Based on the application of wearable Oxygen Mask, an OSS with wearable Mask is introduced. A mathematical model of OSS with a voice coil motor drive valve is provided. The improved active disturbance rejection control (ADRC) strategy with feed-forward and two limits is applied to the system according to the dead-zone characteristics of this OSS. The platform is built and mathematical simulations are carried out for the control strategy, comparing with the proportional integral derivative (PID) control algorithm with feed-forward. The results demonstrate that the differential pressure between the Mask and the outside can be within ideal boundaries through both improved ADRC and improved PID. And the improved ADRC has better control effect. Meanwhile it can be resistant to disturbances and the changing breathing frequency.
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ICPS - Control Strategy and Simulation for Oxygen Supply System with Wearable Oxygen Mask
2019 IEEE International Conference on Industrial Cyber Physical Systems (ICPS), 2019Co-Authors: Fangyou Dong, Xiaolei Zhang, Zengqiang ChenAbstract:Wearable Oxygen Masks play an important role in many fields such as traffic, aviation, medical and health, which is a device worn on the human head. An Oxygen supply system (OSS) with a wearable Mask is even more essential in aeronautical medicine to ensure the safety of pilots. Because of the complexity of the flight environment, having good control performance for pressure regulation is the key to realize the adaptability of Oxygen supply equipment. Based on the application of wearable Oxygen Mask, an OSS with wearable Mask is introduced. A mathematical model of OSS with a voice coil motor drive valve is provided. The improved active disturbance rejection control (ADRC) strategy with feed-forward and two limits is applied to the system according to the dead-zone characteristics of this OSS. The platform is built and mathematical simulations are carried out for the control strategy, comparing with the proportional integral derivative (PID) control algorithm with feed-forward. The results demonstrate that the differential pressure between the Mask and the outside can be within ideal boundaries through both improved ADRC and improved PID. And the improved ADRC has better control effect. Meanwhile it can be resistant to disturbances and the changing breathing frequency.
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Pressure Regulation for Oxygen Mask Based on Active Disturbance Rejection Control
IEEE Transactions on Industrial Electronics, 2017Co-Authors: Yuxin Jiang, Xiaolei Zhang, Zengqiang ChenAbstract:Safe and reliable automatic pressure regulation for the Oxygen Mask is a primary consideration in an Oxygen supply system (OSS). In order to enhance comfort of users, it is of significance to improve performance of the Oxygen regulator. Based on analyses of the operation principle of electronic Oxygen regulator (EOR), a new EOR is designed, where a proportional flow valve is adopted as the throttle valve, and an active disturbance rejection control (ADRC) strategy is applied to control the throttle valve. The external disturbances and the internal dynamics are estimated using an extended state observer. The dynamic compensation using a state error feedback in each sampling period reduces the plant approximately to an integrator tandem structure. Mathematical simulations are performed for the OSS to evaluate the control method compared with the proportional integral derivative (PID) control approach. The simulation and experimental results demonstrate that the ADRC can achieve precise pressure regulation with superior lower inspiratory resistance than the PID method, considering some environmental disturbances including the user's changing pulmonary ventilation. The work in this paper may be a reference for the EOR design.
Joseph J Y Sung - One of the best experts on this subject based on the ideXlab platform.
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exhaled air dispersion during Oxygen delivery via a simple Oxygen Mask
Chest, 2007Co-Authors: Stephen D Hall, Matthew T V Chan, Benny K Chow, Susanna S Ng, Joseph J Y SungAbstract:Background Pneumonia viruses such as influenza may potentially spread by airborne transmission. We studied the dispersion of exhaled air through a simple Oxygen Mask applied to a human patient simulator (HPS) during the delivery of different Oxygen flow in a room free of air currents. Methods The HPS represented a 70-kg adult male individual in a semi-sitting position on a hospital bed inclined at 45°. A simple Oxygen Mask was fitted to the HPS in the normal fashion. The head, neck, and internal airways of the HPS were configured to allow realistic airflow modeling in the airways and around the face. The HPS was programmed to breathe at a respiratory rate of 14 breaths/min with a tidal volume of 0.5 L. Airflow was marked with intrapulmonary smoke for visualization. A leakage jet plume was revealed by a laser light-sheet, and images were captured by high-resolution video. Smoke concentration in the exhaled plume was estimated from the total light intensity scattered by smoke particles. Findings A jet plume of air leaked through the side vents of the simple Oxygen Mask to lateral distances of 0.2, 0.22, 0.3, and 0.4 m from the sagittal plane during the delivery of Oxygen at 4, 6, 8, and 10 L/min, respectively. Coughing could extend the dispersion distance beyond 0.4 m. Conclusion Substantial exposure to exhaled air occurs generally within 0.4 m from patients receiving supplemental Oxygen via a simple Mask. Health-care workers should take precautions when managing patients with community-acquired pneumonia of unknown etiology that is complicated by respiratory failure.
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Airflows around Oxygen Masks: A potential source of infection?
Chest, 2006Co-Authors: Margaret Ip, Stephen D Hall, Matthew T V Chan, Paul K S Chan, Julian W. Tang, Alexandra L.n. Wong, Joseph J Y SungAbstract:Patients with respiratory infections often require the use of supplemental Oxygen via Oxygen Masks, which, in the hospital, may become sources of aerosolized infectious pathogens. To assess this risk, a human lung model (respiration rate, 12 breaths/min) was designed to test the potential for a simple Oxygen Mask at a common setting (4 L/min) to disperse potentially infectious exhaled air into the surrounding area. A laser sheet was used to illuminate the exhaled air from the Mask, which contained fine tracer smoke particles. An analysis of captured digital images showed that the exhaled air at the peak of simulated exhalation reached a distance of approximately 0.40 m.
Yuxin Jiang - One of the best experts on this subject based on the ideXlab platform.
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Pressure Control for Oxygen Supply System Based on ADRC-GPC
2018 37th Chinese Control Conference (CCC), 2018Co-Authors: Fangyou Dong, Yuxin Jiang, Zengqiang ChenAbstract:High-performance of an Oxygen supply system (OSS) is essential to flight quality. But the OSS is sensible to flight conditions and pilots' breathing state, and robustness is necessary. Herein, this paper introduced the mathematical model of the OSS. Then a novel active disturbance rejection generalized predictive control (ADRC-GPC) was applied to the OSS, by combining the technique of active disturbance rejection control (ADRC) and generalized predictive control (GPC). Meanwhile, the simulation results investigated that the pressure of Oxygen Mask can be controlled within the limits of breathing resistance. Finally, the comparison of the simulation between GPC and ADRC-GPC showed that ADRC-GPC was more stable and more effective in lowering breathing resistance than GPC.
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Pressure Regulation for Oxygen Mask Based on Active Disturbance Rejection Control
IEEE Transactions on Industrial Electronics, 2017Co-Authors: Yuxin Jiang, Xiaolei Zhang, Zengqiang ChenAbstract:Safe and reliable automatic pressure regulation for the Oxygen Mask is a primary consideration in an Oxygen supply system (OSS). In order to enhance comfort of users, it is of significance to improve performance of the Oxygen regulator. Based on analyses of the operation principle of electronic Oxygen regulator (EOR), a new EOR is designed, where a proportional flow valve is adopted as the throttle valve, and an active disturbance rejection control (ADRC) strategy is applied to control the throttle valve. The external disturbances and the internal dynamics are estimated using an extended state observer. The dynamic compensation using a state error feedback in each sampling period reduces the plant approximately to an integrator tandem structure. Mathematical simulations are performed for the OSS to evaluate the control method compared with the proportional integral derivative (PID) control approach. The simulation and experimental results demonstrate that the ADRC can achieve precise pressure regulation with superior lower inspiratory resistance than the PID method, considering some environmental disturbances including the user's changing pulmonary ventilation. The work in this paper may be a reference for the EOR design.
Stephen D Hall - One of the best experts on this subject based on the ideXlab platform.
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exhaled air dispersion during Oxygen delivery via a simple Oxygen Mask
Chest, 2007Co-Authors: Stephen D Hall, Matthew T V Chan, Benny K Chow, Susanna S Ng, Joseph J Y SungAbstract:Background Pneumonia viruses such as influenza may potentially spread by airborne transmission. We studied the dispersion of exhaled air through a simple Oxygen Mask applied to a human patient simulator (HPS) during the delivery of different Oxygen flow in a room free of air currents. Methods The HPS represented a 70-kg adult male individual in a semi-sitting position on a hospital bed inclined at 45°. A simple Oxygen Mask was fitted to the HPS in the normal fashion. The head, neck, and internal airways of the HPS were configured to allow realistic airflow modeling in the airways and around the face. The HPS was programmed to breathe at a respiratory rate of 14 breaths/min with a tidal volume of 0.5 L. Airflow was marked with intrapulmonary smoke for visualization. A leakage jet plume was revealed by a laser light-sheet, and images were captured by high-resolution video. Smoke concentration in the exhaled plume was estimated from the total light intensity scattered by smoke particles. Findings A jet plume of air leaked through the side vents of the simple Oxygen Mask to lateral distances of 0.2, 0.22, 0.3, and 0.4 m from the sagittal plane during the delivery of Oxygen at 4, 6, 8, and 10 L/min, respectively. Coughing could extend the dispersion distance beyond 0.4 m. Conclusion Substantial exposure to exhaled air occurs generally within 0.4 m from patients receiving supplemental Oxygen via a simple Mask. Health-care workers should take precautions when managing patients with community-acquired pneumonia of unknown etiology that is complicated by respiratory failure.
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Airflows around Oxygen Masks: A potential source of infection?
Chest, 2006Co-Authors: Margaret Ip, Stephen D Hall, Matthew T V Chan, Paul K S Chan, Julian W. Tang, Alexandra L.n. Wong, Joseph J Y SungAbstract:Patients with respiratory infections often require the use of supplemental Oxygen via Oxygen Masks, which, in the hospital, may become sources of aerosolized infectious pathogens. To assess this risk, a human lung model (respiration rate, 12 breaths/min) was designed to test the potential for a simple Oxygen Mask at a common setting (4 L/min) to disperse potentially infectious exhaled air into the surrounding area. A laser sheet was used to illuminate the exhaled air from the Mask, which contained fine tracer smoke particles. An analysis of captured digital images showed that the exhaled air at the peak of simulated exhalation reached a distance of approximately 0.40 m.
