The Experts below are selected from a list of 78516 Experts worldwide ranked by ideXlab platform
Zu Jing - One of the best experts on this subject based on the ideXlab platform.
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Electro-Thermal Chemical Gun Chamber Pressure Measure System Based on Digital Optic Fiber Transmission
Journal of Gun Launch & Control, 2012Co-Authors: Zu JingAbstract:The Chamber Pressure testing technology was put forward which adopted the field testing technique with digi-tal storage and the digital optic fiber transmission technique,the field memory testing device has multilayer electromagnetic shielding structure,real-time transmission and the remote reappear of the test data were realized by application of high speed digital optical fiber transceiver module and optical fiber.This testing technology effectively solved the electromagnetic interference problem,improved the reliability and safety of Chamber Pressure measurement.The test data provide a basis for interior ballistic properties research of electro-thermal chemical gun.The testing technology can be widely applied to the parameters measurement with strong electromagnetic interfere.
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Frequency Response Characteristic Analysis of Pressure Transmission Pipeline in Weapon Chamber Pressure Measurement System
Journal of Gun Launch & Control, 2012Co-Authors: Zu JingAbstract:The Pressure transmission pipeline is an important part in Chamber Pressure measurement of weapon system.Its dynamic characteristics have direct effect on the frequency range and measuring accuracy of the system.By means of the single degree of freedom second order systems model of Pressure transmission pipeline and its approximate algorithm,numerical simulation for the frequency response characteristics of the Pressure transmission pipeline was carried out.The effects of the natural frequency of the Pressure transmission pipeline caused by geometrical parameters and air volume in Pressure transmission medium were analyzed.The results of theoretical analysis and numerical simulation can provide basis for the design and use of Pressure transmission pipeline in the Chamber Pressure measurement.
Ikkoh Funaki - One of the best experts on this subject based on the ideXlab platform.
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experimental study of the structure of forward tilting rotating detonation waves and highly maintained combustion Chamber Pressure in a disk shaped combustor
Proceedings of the Combustion Institute, 2017Co-Authors: Soma Nakagami, Ken Matsuoka, Jiro Kasahara, Akiko Matsuo, Ikkoh FunakiAbstract:Abstract The structure of detonation waves in rotating detonation combustors (RDCs) and their combustion Chamber Pressure characteristics have not yet been fully clarified due to the complexity and shape of the RDC combustion Chamber. Therefore, a disk-shaped RDC was used in this study to visualize the inside of the combustion Chamber while simultaneously measuring its Pressure. Forward-tilting rotating detonation waves were observed, and a schematic was proposed for them. The initial velocity of the forward-tilting rotating detonation wave was 1200 ± 160 m/s, and it subsequently increased to 1600 ± 160 m/s; meanwhile, the Chapman–Jouguet (CJ) velocity was 2376 m/s. There are several reasons why the velocity may have differed so widely from the CJ value, including the presence of burned gas in front of the detonation wave, the complicated wave structure due to non-uniformity of the mixture in the RDC, insufficient propellant mixing, and the difference between the true and actual wave propagation direction. The velocity and amplitude of the combustion Chamber static Pressure appeared to be correlated. Averaged combustion Chamber static Pressure reached 0.432 MPa, which was 89.0% and 92.8% of the fuel and oxidizer plenum Pressure, respectively. Dynamic Pressure was also estimated using an equilibrium calculation. The resulting dynamic Pressure was 0.008 MPa, and estimated total Pressure was 0.440 MPa; these values were 90.1% and 94.6% of the fuel and oxidizer plenum total Pressure, respectively, even though Pressure was lost through the small diameter injector holes.
Ridong Zhang - One of the best experts on this subject based on the ideXlab platform.
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multivariable decoupling predictive functional control with non zero pole cancellation and state weighting application on Chamber Pressure in a coke furnace
Chemical Engineering Science, 2013Co-Authors: Ridong Zhang, Furong GaoAbstract:Abstract Based on the multivariable description of processes in industry, a non-zero–pole cancellation decoupling strategy is first proposed and then used for state space predictive functional control (PFC) design. The proposed decoupling guarantees realization and enables the control system design to be based on single-input single-output (SISO) process formulations. To facilitate the closed-loop control performance improvement, the subsequent controller design adopts an extended non-minimal structure that can regulate the process state dynamics, which provides more degrees compared with traditional state space methods. By interpretations of the proposed performance through process transfer function formulations, relationship with and superiority to traditional state space PFC are further revealed. Finally, the effectiveness and merits of the proposed are illustrated by application to a typical industrial Chamber Pressure process, in comparison with a typical non-minimal state space PFC method recently developed.
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a simplified linear iterative predictive functional control approach for Chamber Pressure of industrial coke furnace
Journal of Process Control, 2010Co-Authors: Ridong Zhang, Anke Xue, Aipeng Jiang, Shuqing WangAbstract:This paper describes the application of a linear iterative design of nonlinear predictive functional control for Chamber Pressure of industrial coke furnace. The control target is to maintain the Chamber Pressure of a coke furnace within a set range while rejecting the effect of disturbances (mainly the coke removing process and the switch of coke towers).The proposed control is easy to implement, as it selects a simple structure and a linear iterative approach instead of nonlinear control schemes to improve control performance in such a way that results compared with traditional PID controllers are improved. Application of industrial plant demonstrates the efficiency of the method.
Soma Nakagami - One of the best experts on this subject based on the ideXlab platform.
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experimental study of the structure of forward tilting rotating detonation waves and highly maintained combustion Chamber Pressure in a disk shaped combustor
Proceedings of the Combustion Institute, 2017Co-Authors: Soma Nakagami, Ken Matsuoka, Jiro Kasahara, Akiko Matsuo, Ikkoh FunakiAbstract:Abstract The structure of detonation waves in rotating detonation combustors (RDCs) and their combustion Chamber Pressure characteristics have not yet been fully clarified due to the complexity and shape of the RDC combustion Chamber. Therefore, a disk-shaped RDC was used in this study to visualize the inside of the combustion Chamber while simultaneously measuring its Pressure. Forward-tilting rotating detonation waves were observed, and a schematic was proposed for them. The initial velocity of the forward-tilting rotating detonation wave was 1200 ± 160 m/s, and it subsequently increased to 1600 ± 160 m/s; meanwhile, the Chapman–Jouguet (CJ) velocity was 2376 m/s. There are several reasons why the velocity may have differed so widely from the CJ value, including the presence of burned gas in front of the detonation wave, the complicated wave structure due to non-uniformity of the mixture in the RDC, insufficient propellant mixing, and the difference between the true and actual wave propagation direction. The velocity and amplitude of the combustion Chamber static Pressure appeared to be correlated. Averaged combustion Chamber static Pressure reached 0.432 MPa, which was 89.0% and 92.8% of the fuel and oxidizer plenum Pressure, respectively. Dynamic Pressure was also estimated using an equilibrium calculation. The resulting dynamic Pressure was 0.008 MPa, and estimated total Pressure was 0.440 MPa; these values were 90.1% and 94.6% of the fuel and oxidizer plenum total Pressure, respectively, even though Pressure was lost through the small diameter injector holes.
D.q. Wang - One of the best experts on this subject based on the ideXlab platform.
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Investigation of freeze-drying sublimation rates using a freeze-drying microbalance technique.
International Journal of Pharmaceutics, 2004Co-Authors: Jun Xiang, Jeffery M Hey, Volker Liedtke, D.q. WangAbstract:Abstract This study was to investigate the effects of different freeze–drying factors on the rate of sublimation. The experiments were carried out in a custom-built freeze–drying microbalance to accurately monitor the sample temperature and control the Chamber Pressure. Twenty-four experiments were conducted based on a full factorial design by changing four factors: freezing rate (fast freezing or slow freezing), Chamber temperature (35, 0, or −35 °C), Chamber Pressure (30 or 1000 mTorr), and the presence or absence of an annealing process. Lactate dehydrogenase (LDH), a tetrameric protein, was selected as a model protein for this study. The statistical analysis of the experimental results revealed that Chamber temperature, analogous to the shelf temperature, in this experiment system, had the greatest impact on the sublimation rate. High Chamber temperature resulted in high sublimation rate, regardless of the Chamber Pressure and thermal history of the sample. Chamber Pressure was an important factor affecting the sublimation rate. In addition, both Chamber temperature and Chamber Pressure had significant impact on sample temperature during freeze–drying. Annealing the samples was the most critical step to preserve good freeze–dried cake structure.
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Investigation of freeze-drying sublimation rates using a freeze-drying microbalance technique.
International journal of pharmaceutics, 2004Co-Authors: Jun Xiang, Jeffery M Hey, Volker Liedtke, D.q. WangAbstract:This study was to investigate the effects of different freeze-drying factors on the rate of sublimation. The experiments were carried out in a custom-built freeze-drying microbalance to accurately monitor the sample temperature and control the Chamber Pressure. Twenty-four experiments were conducted based on a full factorial design by changing four factors: freezing rate (fast freezing or slow freezing), Chamber temperature (35, 0, or -35 degrees C), Chamber Pressure (30 or 1000 mTorr), and the presence or absence of an annealing process. Lactate dehydrogenase (LDH), a tetrameric protein, was selected as a model protein for this study. The statistical analysis of the experimental results revealed that Chamber temperature, analogous to the shelf temperature, in this experiment system, had the greatest impact on the sublimation rate. High Chamber temperature resulted in high sublimation rate, regardless of the Chamber Pressure and thermal history of the sample. Chamber Pressure was an important factor affecting the sublimation rate. In addition, both Chamber temperature and Chamber Pressure had significant impact on sample temperature during freeze-drying. Annealing the samples was the most critical step to preserve good freeze-dried cake structure.