The Experts below are selected from a list of 42 Experts worldwide ranked by ideXlab platform

Greg Shaver - One of the best experts on this subject based on the ideXlab platform.

  • Physics Based Control Oriented Modeling of Exhaust Gas Enthalpy for Engines Utilizing Variable Valve Actuation
    ASME 2011 Dynamic Systems and Control Conference and Bath ASME Symposium on Fluid Power and Motion Control Volume 2, 2011
    Co-Authors: Ed Koeberlein, Karla Stricker, Lyle Kocher, Dan Van Alstine, Greg Shaver
    Abstract:

    Accurate calculation of the conditions (i.e., temperature, pressure, and enthalpy) of internal combustion engine cylinder exhaust is critical to the modeling of, and control design development for, gas exchange in modern and future diesel engine systems. In this paper, a physically-based model for cylinder exhaust temperature, pressure, and enthalpy for engines equipped with variable valve actuation is outlined and extensively validated against experimental data from 193 operating points. The model takes the known conditions when the intake valves close and steps through a Polytropic Compression Process, constant pressure combustion Process beginning at top-dead center, and a Polytropic expansion Process to achieve the desired results when the exhaust valves open. To incorporate the flexibility of modulating the intake valve opening and closing, the effective Compression ratio is used to establish the conditions when the intake valves close. Experimental model validation, via a unique multi-cylinder diesel engine utilizing fully flexible intake valve actuation, shows that the model captures the influences of all of the model inputs: engine speed, charge flow, total fueling quantity, intake manifold pressure, and effective Compression ratio.

  • Physics Based Control Oriented Modeling of Exhaust Gas Enthalpy for Engines Utilizing Variable Valve Actuation
    ASME 2011 Dynamic Systems and Control Conference and Bath ASME Symposium on Fluid Power and Motion Control Volume 2, 2011
    Co-Authors: Ed Koeberlein, Karla Stricker, Lyle Kocher, Dan Van Alstine, Greg Shaver
    Abstract:

    Accurate calculation of the conditions (i.e., temperature, pressure, and enthalpy) of internal combustion engine cylinder exhaust is critical to the modeling of, and control design development for, gas exchange in modern and future diesel engine systems. In this paper, a physically-based model for cylinder exhaust temperature, pressure, and enthalpy for engines equipped with variable valve actuation is outlined and extensively validated against experimental data from 193 operating points. The model takes the known conditions when the intake valves close and steps through a Polytropic Compression Process, constant pressure combustion Process beginning at top-dead center, and a Polytropic expansion Process to achieve the desired results when the exhaust valves open. To incorporate the flexibility of modulating the intake valve opening and closing, the effective Compression ratio is used to establish the conditions when the intake valves close. Experimental model validation, via a unique multi-cylinder diesel engine utilizing fully flexible intake valve actuation, shows that the model captures the influences of all of the model inputs: engine speed, charge flow, total fueling quantity, intake manifold pressure, and effective Compression ratio.Copyright © 2011 by ASME

Xudong Ding - One of the best experts on this subject based on the ideXlab platform.

  • A Hybrid Steady-State Compressor Model for Real-Time Applications in Performance Monitoring, Control and Optimization
    IEEE Access, 2021
    Co-Authors: Chenguang Ning, Xudong Ding, Peiyong Duan, Gang Jing, Yin Chunjie, Qiu Zhong
    Abstract:

    In this study, a hybrid steady-state compressor model is proposed that can be used in the real-time performance monitoring, control and optimization of the vapor Compression cycle. In the proposed model, first, a detailed analysis of the mass flow rate is presented, which is based on the volumetric efficiency concept and the assumption of a Polytropic Compression Process. Then, discharge temperature of the refrigerant and power consumption of the compressor are also investigated. Three semiempirical models are constructed respectively. Further, to tune the unknown empirical parameters of the models, a social learning particle swarm optimization (SLPSO) algorithm is developed by using the real-time experimental data. An experimental apparatus of a refrigerant system is tested to validate the proposed models. The experimental results demonstrate that the proposed models accurately predict the performance of real-time operating compressors. Meanwhile, the models identified by the SLPSO algorithm are more accurate than those identified by the traditional least-squares method.

  • A hybrid modeling for the real-time control and optimization of compressors
    2009 4th IEEE Conference on Industrial Electronics and Applications, 2009
    Co-Authors: Xudong Ding, Guiqing Zhang
    Abstract:

    This paper proposes a hybrid compressor model for the purpose control and optimization of vapor Compression systems. Unlike those existing models, this model is determined by only the inlet and outlet conditions of compressor without requiring detailed geometric specifications, and only the variables responsible to the system performance, which can be measured and controlled, are selected as the input/output (I/O) of the models. The model is derived based on the concept of volumetric efficiency and the assumption of a Polytropic Compression Process. The unknown empirical parameters of the model are identified by the nonlinear least squares methods. The effectiveness of the proposed model is validated by the compressor catalogs data obtained from the manufactures. Results show that the model is accurate and robust and gives a better match to the real performances of compressors over the entire operating range than the existing models. This model is expected to have wide applications in real time control and optimization of vapor Compression systems.

Guiqing Zhang - One of the best experts on this subject based on the ideXlab platform.

  • A hybrid modeling for the real-time control and optimization of compressors
    2009 4th IEEE Conference on Industrial Electronics and Applications, 2009
    Co-Authors: Xudong Ding, Guiqing Zhang
    Abstract:

    This paper proposes a hybrid compressor model for the purpose control and optimization of vapor Compression systems. Unlike those existing models, this model is determined by only the inlet and outlet conditions of compressor without requiring detailed geometric specifications, and only the variables responsible to the system performance, which can be measured and controlled, are selected as the input/output (I/O) of the models. The model is derived based on the concept of volumetric efficiency and the assumption of a Polytropic Compression Process. The unknown empirical parameters of the model are identified by the nonlinear least squares methods. The effectiveness of the proposed model is validated by the compressor catalogs data obtained from the manufactures. Results show that the model is accurate and robust and gives a better match to the real performances of compressors over the entire operating range than the existing models. This model is expected to have wide applications in real time control and optimization of vapor Compression systems.

Ed Koeberlein - One of the best experts on this subject based on the ideXlab platform.

  • Physics Based Control Oriented Modeling of Exhaust Gas Enthalpy for Engines Utilizing Variable Valve Actuation
    ASME 2011 Dynamic Systems and Control Conference and Bath ASME Symposium on Fluid Power and Motion Control Volume 2, 2011
    Co-Authors: Ed Koeberlein, Karla Stricker, Lyle Kocher, Dan Van Alstine, Greg Shaver
    Abstract:

    Accurate calculation of the conditions (i.e., temperature, pressure, and enthalpy) of internal combustion engine cylinder exhaust is critical to the modeling of, and control design development for, gas exchange in modern and future diesel engine systems. In this paper, a physically-based model for cylinder exhaust temperature, pressure, and enthalpy for engines equipped with variable valve actuation is outlined and extensively validated against experimental data from 193 operating points. The model takes the known conditions when the intake valves close and steps through a Polytropic Compression Process, constant pressure combustion Process beginning at top-dead center, and a Polytropic expansion Process to achieve the desired results when the exhaust valves open. To incorporate the flexibility of modulating the intake valve opening and closing, the effective Compression ratio is used to establish the conditions when the intake valves close. Experimental model validation, via a unique multi-cylinder diesel engine utilizing fully flexible intake valve actuation, shows that the model captures the influences of all of the model inputs: engine speed, charge flow, total fueling quantity, intake manifold pressure, and effective Compression ratio.

  • Physics Based Control Oriented Modeling of Exhaust Gas Enthalpy for Engines Utilizing Variable Valve Actuation
    ASME 2011 Dynamic Systems and Control Conference and Bath ASME Symposium on Fluid Power and Motion Control Volume 2, 2011
    Co-Authors: Ed Koeberlein, Karla Stricker, Lyle Kocher, Dan Van Alstine, Greg Shaver
    Abstract:

    Accurate calculation of the conditions (i.e., temperature, pressure, and enthalpy) of internal combustion engine cylinder exhaust is critical to the modeling of, and control design development for, gas exchange in modern and future diesel engine systems. In this paper, a physically-based model for cylinder exhaust temperature, pressure, and enthalpy for engines equipped with variable valve actuation is outlined and extensively validated against experimental data from 193 operating points. The model takes the known conditions when the intake valves close and steps through a Polytropic Compression Process, constant pressure combustion Process beginning at top-dead center, and a Polytropic expansion Process to achieve the desired results when the exhaust valves open. To incorporate the flexibility of modulating the intake valve opening and closing, the effective Compression ratio is used to establish the conditions when the intake valves close. Experimental model validation, via a unique multi-cylinder diesel engine utilizing fully flexible intake valve actuation, shows that the model captures the influences of all of the model inputs: engine speed, charge flow, total fueling quantity, intake manifold pressure, and effective Compression ratio.Copyright © 2011 by ASME

Qiu Zhong - One of the best experts on this subject based on the ideXlab platform.

  • A Hybrid Steady-State Compressor Model for Real-Time Applications in Performance Monitoring, Control and Optimization
    IEEE Access, 2021
    Co-Authors: Chenguang Ning, Xudong Ding, Peiyong Duan, Gang Jing, Yin Chunjie, Qiu Zhong
    Abstract:

    In this study, a hybrid steady-state compressor model is proposed that can be used in the real-time performance monitoring, control and optimization of the vapor Compression cycle. In the proposed model, first, a detailed analysis of the mass flow rate is presented, which is based on the volumetric efficiency concept and the assumption of a Polytropic Compression Process. Then, discharge temperature of the refrigerant and power consumption of the compressor are also investigated. Three semiempirical models are constructed respectively. Further, to tune the unknown empirical parameters of the models, a social learning particle swarm optimization (SLPSO) algorithm is developed by using the real-time experimental data. An experimental apparatus of a refrigerant system is tested to validate the proposed models. The experimental results demonstrate that the proposed models accurately predict the performance of real-time operating compressors. Meanwhile, the models identified by the SLPSO algorithm are more accurate than those identified by the traditional least-squares method.