The Experts below are selected from a list of 114450 Experts worldwide ranked by ideXlab platform
Jiongqi Wang - One of the best experts on this subject based on the ideXlab platform.
-
maximum correntropy unscented kalman filter for ballistic missile navigation system based on sins cns deeply Integrated Mode
Sensors, 2018Co-Authors: Bowen Hou, Haiyin Zhou, Jiongqi WangAbstract:Strap-down inertial navigation system/celestial navigation system ( SINS/CNS) Integrated navigation is a high precision navigation technique for ballistic missiles. The traditional navigation method has a divergence in the position error. A deeply Integrated Mode for SINS/CNS navigation system is proposed to improve the navigation accuracy of ballistic missile. The deeply Integrated navigation principle is described and the observability of the navigation system is analyzed. The nonlinearity, as well as the large outliers and the Gaussian mixture noises, often exists during the actual navigation process, leading to the divergence phenomenon of the navigation filter. The new nonlinear Kalman filter on the basis of the maximum correntropy theory and unscented transformation, named the maximum correntropy unscented Kalman filter, is deduced, and the computational complexity is analyzed. The unscented transformation is used for restricting the nonlinearity of the system equation, and the maximum correntropy theory is used to deal with the non-Gaussian noises. Finally, numerical simulation illustrates the superiority of the proposed filter compared with the traditional unscented Kalman filter. The comparison results show that the large outliers and the influence of non-Gaussian noises for SINS/CNS deeply Integrated navigation is significantly reduced through the proposed filter.
-
Maximum Correntropy Unscented Kalman Filter for Ballistic Missile Navigation System based on SINS/CNS Deeply Integrated Mode
MDPI AG, 2018Co-Authors: Bowen Hou, Haiyin Zhou, Jiongqi WangAbstract:Strap-down inertial navigation system/celestial navigation system (SINS/CNS) Integrated navigation is a high precision navigation technique for ballistic missiles. The traditional navigation method has a divergence in the position error. A deeply Integrated Mode for SINS/CNS navigation system is proposed to improve the navigation accuracy of ballistic missile. The deeply Integrated navigation principle is described and the observability of the navigation system is analyzed. The nonlinearity, as well as the large outliers and the Gaussian mixture noises, often exists during the actual navigation process, leading to the divergence phenomenon of the navigation filter. The new nonlinear Kalman filter on the basis of the maximum correntropy theory and unscented transformation, named the maximum correntropy unscented Kalman filter, is deduced, and the computational complexity is analyzed. The unscented transformation is used for restricting the nonlinearity of the system equation, and the maximum correntropy theory is used to deal with the non-Gaussian noises. Finally, numerical simulation illustrates the superiority of the proposed filter compared with the traditional unscented Kalman filter. The comparison results show that the large outliers and the influence of non-Gaussian noises for SINS/CNS deeply Integrated navigation is significantly reduced through the proposed filter
Joongmyeon Bae - One of the best experts on this subject based on the ideXlab platform.
-
A diesel fuel processor for stable operation of solid oxide fuel cells system: II. Integrated diesel fuel processor for the operation of solid oxide fuel cells
International Journal of Hydrogen Energy, 2012Co-Authors: Sangho Yoon, Joongmyeon Bae, Sangho Lee, Thang V. Pham, Sai P. KatikaneniAbstract:Abstract Post-reforming experimental results for the complete removal of light hydrocarbons from diesel reformate are introduced in part I. In part II of the paper, an Integrated diesel fuel processor is investigated for the stable operation of SOFCs. Several post-reforming processors have been operated to suppress both sulfur poisoning and carbon deposition on the anode catalyst. The Integrated diesel fuel processor is composed of an autothermal reformer, a desulfurizer, and a post-reformer. The autothermal reforming section in the Integrated diesel fuel processor effectively decomposes aromatics, and converts fuel into H2-rich syngas. The subsequent desulfurizer removes sulfur-containing compounds present in the diesel reformate. Finally, the post-reformer completely removes the light hydrocarbons, which are carbon precursors, in the diesel reformate. We successfully operate the diesel reformer, desulfurizer, and post-reformer as microreactors for about 2500 h in an Integrated Mode. The degradation rate of the overall reforming performance is negligible for the 2000 h, and light hydrocarbons and sulfur-containing compounds are completely removed from the diesel reformate.
-
a diesel fuel processor for stable operation of solid oxide fuel cells system i introduction to post reforming for the diesel fuel processor
Catalysis Today, 2010Co-Authors: Sangho Yoon, Joongmyeon BaeAbstract:Abstract In this paper, a new concept of diesel fuel processing is introduced for the stable operation of solid oxide fuel cells (SOFCs). High temperature operation of SOFCs can lead to the capability of internal reforming with fuel flexibility. SOFCs can directly use CH 4 and CO as fuels given sufficient steam feeds due to catalytic reaction on the SOFC anode. However, heavier hydrocarbons than CH 4 , such as ethylene, ethane, propane, etc., induce carbon deposition on the Ni-based anode of SOFCs. In the case of an ethylene steam reforming reaction on the Ni-based catalyst, the rate of carbon deposition is faster than it is when hydrocarbons, including aromatics, are used. Hence, the removal of light hydrocarbons (over C 1 -hydrocarbons), especially ethylene, with the reformate gases of heavy hydrocarbons (diesel, gasoline, kerosene, and JP-8) is important for stable operation of SOFCs. A new methodology, called the “post-reformer”, is introduced for removing the light hydrocarbons (over C 1 -hydrocarbons) with the reformate gas stream. The CGO-Ru (3.0 wt.%) catalyst was selected as the post-reforming catalyst because it shows high selectivity for removing light hydrocarbons (over C 1 -hydrocarbons) and achieving the high reforming efficiency. The diesel reformer and post-reformer are continuously operated for about 200 h in an Integrated Mode. The reforming performance did not degrade, and light hydrocarbons (over C 1 -hydrocarbons) in the diesel reformate were completely removed.
Sangho Yoon - One of the best experts on this subject based on the ideXlab platform.
-
A diesel fuel processor for stable operation of solid oxide fuel cells system: II. Integrated diesel fuel processor for the operation of solid oxide fuel cells
International Journal of Hydrogen Energy, 2012Co-Authors: Sangho Yoon, Joongmyeon Bae, Sangho Lee, Thang V. Pham, Sai P. KatikaneniAbstract:Abstract Post-reforming experimental results for the complete removal of light hydrocarbons from diesel reformate are introduced in part I. In part II of the paper, an Integrated diesel fuel processor is investigated for the stable operation of SOFCs. Several post-reforming processors have been operated to suppress both sulfur poisoning and carbon deposition on the anode catalyst. The Integrated diesel fuel processor is composed of an autothermal reformer, a desulfurizer, and a post-reformer. The autothermal reforming section in the Integrated diesel fuel processor effectively decomposes aromatics, and converts fuel into H2-rich syngas. The subsequent desulfurizer removes sulfur-containing compounds present in the diesel reformate. Finally, the post-reformer completely removes the light hydrocarbons, which are carbon precursors, in the diesel reformate. We successfully operate the diesel reformer, desulfurizer, and post-reformer as microreactors for about 2500 h in an Integrated Mode. The degradation rate of the overall reforming performance is negligible for the 2000 h, and light hydrocarbons and sulfur-containing compounds are completely removed from the diesel reformate.
-
a diesel fuel processor for stable operation of solid oxide fuel cells system i introduction to post reforming for the diesel fuel processor
Catalysis Today, 2010Co-Authors: Sangho Yoon, Joongmyeon BaeAbstract:Abstract In this paper, a new concept of diesel fuel processing is introduced for the stable operation of solid oxide fuel cells (SOFCs). High temperature operation of SOFCs can lead to the capability of internal reforming with fuel flexibility. SOFCs can directly use CH 4 and CO as fuels given sufficient steam feeds due to catalytic reaction on the SOFC anode. However, heavier hydrocarbons than CH 4 , such as ethylene, ethane, propane, etc., induce carbon deposition on the Ni-based anode of SOFCs. In the case of an ethylene steam reforming reaction on the Ni-based catalyst, the rate of carbon deposition is faster than it is when hydrocarbons, including aromatics, are used. Hence, the removal of light hydrocarbons (over C 1 -hydrocarbons), especially ethylene, with the reformate gases of heavy hydrocarbons (diesel, gasoline, kerosene, and JP-8) is important for stable operation of SOFCs. A new methodology, called the “post-reformer”, is introduced for removing the light hydrocarbons (over C 1 -hydrocarbons) with the reformate gas stream. The CGO-Ru (3.0 wt.%) catalyst was selected as the post-reforming catalyst because it shows high selectivity for removing light hydrocarbons (over C 1 -hydrocarbons) and achieving the high reforming efficiency. The diesel reformer and post-reformer are continuously operated for about 200 h in an Integrated Mode. The reforming performance did not degrade, and light hydrocarbons (over C 1 -hydrocarbons) in the diesel reformate were completely removed.
Michael R Watts - One of the best experts on this subject based on the ideXlab platform.
-
Mode evolution based broadband 1 2 port high pass low pass filter for silicon photonics
Optical Fiber Communication Conference, 2017Co-Authors: Emir Salih Magden, Christopher V Poulton, Diedrik Vermeulen, Alfonso Ruocco, Neetesh Singh, Gerald Leake, Douglas D Coolbaugh, L A Kolodziejski, Michael R WattsAbstract:We demonstrate Integrated, Mode-evolution-based, 1×2 port high-pass/low-pass filters in a silicon photonics platform that can simultaneously achieve broadband operation, single cutoff wavelength, and a record high filter roll-off of 2.5 dB/nm for the first time.
-
Integrated Mode evolution based polarization splitter
Optics Letters, 2005Co-Authors: Michael R Watts, H A Haus, E P IppenAbstract:A Mode-evolution-based polarization splitter suitable for high-index-contrast systems and directly integratable with a recently reported on-polarization rotator is described and its performance verified through both finite-difference time-domain and eigenMode expansion simulations. For a device length of 200??m, greater than 22?dB of extinction is obtained across a 1.45–1.75-?m bandwidth.
-
towards Integrated polarization diversity design fabrication and characterization of Integrated polarization splitters and rotators
Optical Fiber Communication Conference, 2005Co-Authors: Michael R Watts, E P Ippen, Tymon Barwicz, L Socci, Peter T Rakich, Henry I Smith, A H HermannAbstract:Integrated Mode-evolution-based polarization splitters and rotators were designed with rigorous electromagnetic simulations and fabricated with a unique multilayer fabrication strategy. Prototype devices demonstrated effective splitting and rotating of polarization with low cross-talk.
-
Integrated Mode evolution based polarization rotators
Optics Letters, 2005Co-Authors: Michael R Watts, H A HausAbstract:For the first time to our knowledge, designs for Mode-evolution-based Integrated polarization rotators requiring only a pair of waveguide core layers are presented. Finite-difference time-domain and eigenMode expansion simulations demonstrate the near-ideal performance of the approach. In contrast with approaches based on Mode coupling, no significant wavelength sensitivity is observed.
Bowen Hou - One of the best experts on this subject based on the ideXlab platform.
-
maximum correntropy unscented kalman filter for ballistic missile navigation system based on sins cns deeply Integrated Mode
Sensors, 2018Co-Authors: Bowen Hou, Haiyin Zhou, Jiongqi WangAbstract:Strap-down inertial navigation system/celestial navigation system ( SINS/CNS) Integrated navigation is a high precision navigation technique for ballistic missiles. The traditional navigation method has a divergence in the position error. A deeply Integrated Mode for SINS/CNS navigation system is proposed to improve the navigation accuracy of ballistic missile. The deeply Integrated navigation principle is described and the observability of the navigation system is analyzed. The nonlinearity, as well as the large outliers and the Gaussian mixture noises, often exists during the actual navigation process, leading to the divergence phenomenon of the navigation filter. The new nonlinear Kalman filter on the basis of the maximum correntropy theory and unscented transformation, named the maximum correntropy unscented Kalman filter, is deduced, and the computational complexity is analyzed. The unscented transformation is used for restricting the nonlinearity of the system equation, and the maximum correntropy theory is used to deal with the non-Gaussian noises. Finally, numerical simulation illustrates the superiority of the proposed filter compared with the traditional unscented Kalman filter. The comparison results show that the large outliers and the influence of non-Gaussian noises for SINS/CNS deeply Integrated navigation is significantly reduced through the proposed filter.
-
Maximum Correntropy Unscented Kalman Filter for Ballistic Missile Navigation System based on SINS/CNS Deeply Integrated Mode
MDPI AG, 2018Co-Authors: Bowen Hou, Haiyin Zhou, Jiongqi WangAbstract:Strap-down inertial navigation system/celestial navigation system (SINS/CNS) Integrated navigation is a high precision navigation technique for ballistic missiles. The traditional navigation method has a divergence in the position error. A deeply Integrated Mode for SINS/CNS navigation system is proposed to improve the navigation accuracy of ballistic missile. The deeply Integrated navigation principle is described and the observability of the navigation system is analyzed. The nonlinearity, as well as the large outliers and the Gaussian mixture noises, often exists during the actual navigation process, leading to the divergence phenomenon of the navigation filter. The new nonlinear Kalman filter on the basis of the maximum correntropy theory and unscented transformation, named the maximum correntropy unscented Kalman filter, is deduced, and the computational complexity is analyzed. The unscented transformation is used for restricting the nonlinearity of the system equation, and the maximum correntropy theory is used to deal with the non-Gaussian noises. Finally, numerical simulation illustrates the superiority of the proposed filter compared with the traditional unscented Kalman filter. The comparison results show that the large outliers and the influence of non-Gaussian noises for SINS/CNS deeply Integrated navigation is significantly reduced through the proposed filter