The Experts below are selected from a list of 6489 Experts worldwide ranked by ideXlab platform

Elliot B Sloane - One of the best experts on this subject based on the ideXlab platform.

  • quality of service qos in healthcare applications colored petri net simulation for design of heterogeneous multi vendor integrated life critical wireless 802 x patient care device networks
    Americas Conference on Information Systems, 2005
    Co-Authors: Vijay Gehlot, Elliot B Sloane
    Abstract:

    The ability to deploy wireless patient monitors using industry-standard IEEE 802.x technologies allows patient mobility and clinical flexibly. However, interconnecting multiple life-critical medical devices from multiple vendors can introduce unintended life-threatening risks unless delivery of critical patient alarms to central monitoring systems and/or clinical personnel is assured. Petri net tools allow automated testing of all possible states and transitions between devices and/or systems to detect potential failure modes in advance. Colored Petri Net (CPN) tools allow tracking and controlling each Message in a network based on pre-selected criteria. This paper describes a research project using CPN to simulate and validate alarm integrity in a small multi-modality wireless patient monitoring system. Free research CPN software, CPNTool, is used to simulate two, 20-monitor wireless patient monitoring networks. One network simulated standard nonprioritized 802.x IP protocols and simulated Quality of Service (QoS) capabilities similar to 802.11e, allowing Message Priority management. In the standard 802.x network, dangerous heart arrhythmia and pulse oximetry alarms were missed, but QoS Priority management reduced that risk significantly.

  • ensuring patient safety by using colored petri net simulation in the design of heterogeneous multi vendor integrated life critical wireless 802 x patient care device networks
    International Conference of the IEEE Engineering in Medicine and Biology Society, 2005
    Co-Authors: Elliot B Sloane, Vijay Gehlot
    Abstract:

    Hospitals and manufacturers are designing and deploying the IEEE 802.x wireless technologies in medical devices to promote patient mobility and flexible facility use. There is little information, however, on the reliability or ultimate safety of connecting multiple wireless life-critical medical devices from multiple vendors using commercial 802.11a, 802.11b, 802.11g or pre-802.11n devices. It is believed that 802.11-type devices can introduce unintended life-threatening risks unless delivery of critical patient alarms to central monitoring systems and/or clinical personnel is assured by proper use of 802.11e quality of service (QoS) methods. Petri net tools can be used to simulate all possible states and transitions between devices and/or systems in a wireless device network, and can identify failure modes in advance. Colored petri net (CPN) tools are ideal, in fact, as they allow tracking and controlling each Message in a network based on pre-selected criteria. This paper describes a research project using CPN to simulate and validate alarm integrity in a small multi-modality wireless patient monitoring system. A 20-monitor wireless patient monitoring network is created in two versions: one with non-prioritized 802.x CSM protocols and the second with simulated quality of service (QoS) capabilities similar to 802.11e (i.e., the second network allows Message Priority management.) In the standard 802.x network, dangerous heart arrhythmia and pulse oximetry alarms could not be reliably and rapidly communicated, but the second network's QoS Priority management reduced that risk significantly

Vijay Gehlot - One of the best experts on this subject based on the ideXlab platform.

  • Ensuring Patient Safety by using Colored Petri Net Simulation in the Design of Heterogeneous, Multi-Vendor, Integrated, Life- Critical Wireless (802.x) Patient Care Device Networks
    2020
    Co-Authors: Senior Member, Ieee Elliot B Sloane, Vijay Gehlot
    Abstract:

    Abstract- Petri net tools can be used to simulate all possible states and transitions between devices and/or systems in a wireless device network, and can identify failure modes in advance. Colored Petri Net (CPN) tools are ideal, in fact, as they allow tracking and controlling each Message in a network based on preselected criteria. This paper describes a research project using CPN to simulate and validate alarm integrity in a small multimodality wireless patient monitoring system. A 20-monitor wireless patient monitoring network is created in two versions: one with non-prioritized 802.x CSM protocols and the second with simulated Quality of Service (QoS) capabilities similar to 802.11e (i.e., the second network allows Message Priority management.) In the standard 802.x network, dangerous heart arrhythmia and pulse oximetry alarms could not be reliably and rapidly communicated, but the second network's QoS Priority management reduced that risk significantly

  • quality of service qos in healthcare applications colored petri net simulation for design of heterogeneous multi vendor integrated life critical wireless 802 x patient care device networks
    Americas Conference on Information Systems, 2005
    Co-Authors: Vijay Gehlot, Elliot B Sloane
    Abstract:

    The ability to deploy wireless patient monitors using industry-standard IEEE 802.x technologies allows patient mobility and clinical flexibly. However, interconnecting multiple life-critical medical devices from multiple vendors can introduce unintended life-threatening risks unless delivery of critical patient alarms to central monitoring systems and/or clinical personnel is assured. Petri net tools allow automated testing of all possible states and transitions between devices and/or systems to detect potential failure modes in advance. Colored Petri Net (CPN) tools allow tracking and controlling each Message in a network based on pre-selected criteria. This paper describes a research project using CPN to simulate and validate alarm integrity in a small multi-modality wireless patient monitoring system. Free research CPN software, CPNTool, is used to simulate two, 20-monitor wireless patient monitoring networks. One network simulated standard nonprioritized 802.x IP protocols and simulated Quality of Service (QoS) capabilities similar to 802.11e, allowing Message Priority management. In the standard 802.x network, dangerous heart arrhythmia and pulse oximetry alarms were missed, but QoS Priority management reduced that risk significantly.

  • ensuring patient safety by using colored petri net simulation in the design of heterogeneous multi vendor integrated life critical wireless 802 x patient care device networks
    International Conference of the IEEE Engineering in Medicine and Biology Society, 2005
    Co-Authors: Elliot B Sloane, Vijay Gehlot
    Abstract:

    Hospitals and manufacturers are designing and deploying the IEEE 802.x wireless technologies in medical devices to promote patient mobility and flexible facility use. There is little information, however, on the reliability or ultimate safety of connecting multiple wireless life-critical medical devices from multiple vendors using commercial 802.11a, 802.11b, 802.11g or pre-802.11n devices. It is believed that 802.11-type devices can introduce unintended life-threatening risks unless delivery of critical patient alarms to central monitoring systems and/or clinical personnel is assured by proper use of 802.11e quality of service (QoS) methods. Petri net tools can be used to simulate all possible states and transitions between devices and/or systems in a wireless device network, and can identify failure modes in advance. Colored petri net (CPN) tools are ideal, in fact, as they allow tracking and controlling each Message in a network based on pre-selected criteria. This paper describes a research project using CPN to simulate and validate alarm integrity in a small multi-modality wireless patient monitoring system. A 20-monitor wireless patient monitoring network is created in two versions: one with non-prioritized 802.x CSM protocols and the second with simulated quality of service (QoS) capabilities similar to 802.11e (i.e., the second network allows Message Priority management.) In the standard 802.x network, dangerous heart arrhythmia and pulse oximetry alarms could not be reliably and rapidly communicated, but the second network's QoS Priority management reduced that risk significantly

Zhibin Shuai - One of the best experts on this subject based on the ideXlab platform.

  • lateral motion control for four wheel independent drive electric vehicles using optimal torque allocation and dynamic Message Priority scheduling
    Control Engineering Practice, 2014
    Co-Authors: Zhibin Shuai, Hui Zhang, Junmin Wang, Jianqiu Li, Minggao Ouyang
    Abstract:

    Abstract In this paper, the vehicle lateral motion control of four-wheel-independent-drive electric vehicles (4WID-EVs) with combined active front steering (AFS) and direct yaw moment control (DYC) through in-vehicle networks is studied. As a typical over-actuated system, a 4WID-EV requires a control allocation algorithm to achieve the generalized control efforts. In this paper, a quadratic programming (QP) based torque allocation algorithm is proposed with the advantage of equally and reasonably utilizing the tire-road friction of each wheel. It is also well known that the in-vehicle network and x-by-wire technologies have considerable advantages over the traditional point-to-point communications, and bring great strengths to complex control systems such as 4WID-EVs. However, there are also bandwidth limitations which would lead to Message time-delays in in-vehicle network communications and degradation of control performance. The paper also proposes a mechanism to effectively utilize the limited network bandwidth resources and attenuate the adverse impact of in-vehicle network-induced time-delays, based on the idea of dynamic Message Priority scheduling. Simulation results from a high-fidelity vehicle model show that the proposed control architecture with the torque allocation algorithm and Message dynamic-Priority scheduling procedure can effectively improve the vehicle lateral motion control performance, and significantly reduce the adverse impact of the in-vehicle network Message time-delays in the simulated maneuvers.

Minggao Ouyang - One of the best experts on this subject based on the ideXlab platform.

  • lateral motion control for four wheel independent drive electric vehicles using optimal torque allocation and dynamic Message Priority scheduling
    Control Engineering Practice, 2014
    Co-Authors: Zhibin Shuai, Hui Zhang, Junmin Wang, Jianqiu Li, Minggao Ouyang
    Abstract:

    Abstract In this paper, the vehicle lateral motion control of four-wheel-independent-drive electric vehicles (4WID-EVs) with combined active front steering (AFS) and direct yaw moment control (DYC) through in-vehicle networks is studied. As a typical over-actuated system, a 4WID-EV requires a control allocation algorithm to achieve the generalized control efforts. In this paper, a quadratic programming (QP) based torque allocation algorithm is proposed with the advantage of equally and reasonably utilizing the tire-road friction of each wheel. It is also well known that the in-vehicle network and x-by-wire technologies have considerable advantages over the traditional point-to-point communications, and bring great strengths to complex control systems such as 4WID-EVs. However, there are also bandwidth limitations which would lead to Message time-delays in in-vehicle network communications and degradation of control performance. The paper also proposes a mechanism to effectively utilize the limited network bandwidth resources and attenuate the adverse impact of in-vehicle network-induced time-delays, based on the idea of dynamic Message Priority scheduling. Simulation results from a high-fidelity vehicle model show that the proposed control architecture with the torque allocation algorithm and Message dynamic-Priority scheduling procedure can effectively improve the vehicle lateral motion control performance, and significantly reduce the adverse impact of the in-vehicle network Message time-delays in the simulated maneuvers.

Junmin Wang - One of the best experts on this subject based on the ideXlab platform.

  • lateral motion control for four wheel independent drive electric vehicles using optimal torque allocation and dynamic Message Priority scheduling
    Control Engineering Practice, 2014
    Co-Authors: Zhibin Shuai, Hui Zhang, Junmin Wang, Jianqiu Li, Minggao Ouyang
    Abstract:

    Abstract In this paper, the vehicle lateral motion control of four-wheel-independent-drive electric vehicles (4WID-EVs) with combined active front steering (AFS) and direct yaw moment control (DYC) through in-vehicle networks is studied. As a typical over-actuated system, a 4WID-EV requires a control allocation algorithm to achieve the generalized control efforts. In this paper, a quadratic programming (QP) based torque allocation algorithm is proposed with the advantage of equally and reasonably utilizing the tire-road friction of each wheel. It is also well known that the in-vehicle network and x-by-wire technologies have considerable advantages over the traditional point-to-point communications, and bring great strengths to complex control systems such as 4WID-EVs. However, there are also bandwidth limitations which would lead to Message time-delays in in-vehicle network communications and degradation of control performance. The paper also proposes a mechanism to effectively utilize the limited network bandwidth resources and attenuate the adverse impact of in-vehicle network-induced time-delays, based on the idea of dynamic Message Priority scheduling. Simulation results from a high-fidelity vehicle model show that the proposed control architecture with the torque allocation algorithm and Message dynamic-Priority scheduling procedure can effectively improve the vehicle lateral motion control performance, and significantly reduce the adverse impact of the in-vehicle network Message time-delays in the simulated maneuvers.