The Experts below are selected from a list of 315 Experts worldwide ranked by ideXlab platform
Heyan Li - One of the best experts on this subject based on the ideXlab platform.
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Control and parameters matching of straight running for high speed tracked vehicle with hydrostatic drive
2012 IEEE International Conference on Mechatronics and Automation, 2012Co-Authors: Hai Ling Zhang, Heyan LiAbstract:The control strategy and parameters matching is critical for the performance of high-speed tracked vehicle with hydrostatic drive that is composed of engine, hydraulic Pumps and motors. Based on the analysis of characteristic of engine and Pump working together, the Pump Displacement control strategy is proposed and applied in order to accomplish the aim torque and power of engine. Motor Displacement is controlled by engine speed and system pressure so as to realize mobility of vehicle and cooperate with Pump control. With the results of parameters calculation and matching, the vehicle and its driving system are modeled in Matlab/Simulink and system simulation under different typical work conditions are achieved with the driver's inputs and control algorithm in-loop. Validity and effectiveness of control strategy and parameters matching are approved by simulation and the field experiments.
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Study on braking capacity of hydrostatic transmission vehicle
2009 IEEE Intelligent Vehicles Symposium, 2009Co-Authors: Heyan Li, Baorui Chen, Man ChenAbstract:Based on the tracked vehicle hydrostatic transmission which combines a variable Displacement piston Pump and a fixed Displacement piston motor, the paper present a study on hydraulic braking capacity of the hydrostatic transmission and the study show that it is affected by fluid viscosity, system pressure, Pump speed, Pump Displacement, engine braking torque, hydraulic torque efficiency and volumetric efficiency, etc. Through theoretical and experimental analysis, the relations between braking capacity and its influencing factors were obtained. It is useful for braking control of hydrostatic transmission.
Vera Bernet - One of the best experts on this subject based on the ideXlab platform.
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In-line filter included into the syringe infusion Pump assembly reduces flow irregularities
Intensive Care Medicine, 2012Co-Authors: Barbara Brotschi, B. Grass, Markus Weiss, Carsten Doell, Vera BernetAbstract:Purpose To evaluate whether an in-line filter inserted in the syringe Pump infusion line assembly influences start-up times and flow irregularities during vertical Pump Displacement at low infusion rates. Methods Fluid delivery after syringe Pump start-up and after vertical Displacement of the syringe Pump by −50 cm was determined gravimetrically at flow rates of 0.5, 1.0 and 2.0 ml h^−1. Measurements were repeated for each flow rate four times with two different syringe Pumps with and without an in-line filter incorporated. Data are shown as median and range. Results Start-up times were reduced by an in-line filter at 0.5 ml h^−1 flow rate from 355.5 s (0–660) to 115 s (0–320), whereas the effect was attenuated at higher flow rates. Pooling of fluid into the infusion system after lowering the infusion syringe Pump was halved in all flow rates tested. Amount of infusion bolus after elevating the syringe Pump by 50 cm was not affected by an in-line filter. Conclusion In the evaluated model in-line filters help to reduce flow irregularities and delay in drug delivery of syringe Pumps at low flow rates and represent an option to optimize continuous administration of highly concentrated short-acting drugs at very small infusion rates.
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In-line filter included into the syringe infusion Pump assembly reduces flow irregularities
Intensive Care Medicine, 2012Co-Authors: Barbara Brotschi, B. Grass, Markus Weiss, Carsten Doell, Vera BernetAbstract:Purpose To evaluate whether an in-line filter inserted in the syringe Pump infusion line assembly influences start-up times and flow irregularities during vertical Pump Displacement at low infusion rates.
Markus Weiss - One of the best experts on this subject based on the ideXlab platform.
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In-line filter included into the syringe infusion Pump assembly reduces flow irregularities
Intensive Care Medicine, 2012Co-Authors: Barbara Brotschi, B. Grass, Markus Weiss, Carsten Doell, Vera BernetAbstract:Purpose To evaluate whether an in-line filter inserted in the syringe Pump infusion line assembly influences start-up times and flow irregularities during vertical Pump Displacement at low infusion rates. Methods Fluid delivery after syringe Pump start-up and after vertical Displacement of the syringe Pump by −50 cm was determined gravimetrically at flow rates of 0.5, 1.0 and 2.0 ml h^−1. Measurements were repeated for each flow rate four times with two different syringe Pumps with and without an in-line filter incorporated. Data are shown as median and range. Results Start-up times were reduced by an in-line filter at 0.5 ml h^−1 flow rate from 355.5 s (0–660) to 115 s (0–320), whereas the effect was attenuated at higher flow rates. Pooling of fluid into the infusion system after lowering the infusion syringe Pump was halved in all flow rates tested. Amount of infusion bolus after elevating the syringe Pump by 50 cm was not affected by an in-line filter. Conclusion In the evaluated model in-line filters help to reduce flow irregularities and delay in drug delivery of syringe Pumps at low flow rates and represent an option to optimize continuous administration of highly concentrated short-acting drugs at very small infusion rates.
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In-line filter included into the syringe infusion Pump assembly reduces flow irregularities
Intensive Care Medicine, 2012Co-Authors: Barbara Brotschi, B. Grass, Markus Weiss, Carsten Doell, Vera BernetAbstract:Purpose To evaluate whether an in-line filter inserted in the syringe Pump infusion line assembly influences start-up times and flow irregularities during vertical Pump Displacement at low infusion rates.
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Accurate continuous drug delivery at low infusion rate with a novel microvolumetric infusion Pump (MVIP): Pump design, evaluation and comparison to the current standard
Anaesthesia, 2004Co-Authors: Markus Weiss, S. Gerber, Rudolf Marcel Füchslin, Thomas A. NeffAbstract:Summary Infusion devices for continuous and precise drug administration are indispensable tools in anaesthesia and critical care medicine. Problems such as start-up delays, non-continuous flow and susceptibility to hydrostatic pressure changes at low infusion rates resulting in accidental bolus release or prolonged flow interruption are inherent to current infusion technology. In order to improve precise drug delivery, an innovative technical concept has been realised in a novel microvolumetric infusion Pump (MVIP) device. The MVIP principle includes repeated filling and emptying of a non-compliant microsyringe without the use of valves. The performance of the MVIP prototype has been evaluated and compared with standard syringe infusion Pump assemblies. The novel MVIP concept has thereby proven to eliminate most problems during infusion start-up, steady state flow and vertical Pump Displacement, and has the potential of revolutionising infusion technology and setting a new dimension in patient safety.
Barbara Brotschi - One of the best experts on this subject based on the ideXlab platform.
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In-line filter included into the syringe infusion Pump assembly reduces flow irregularities
Intensive Care Medicine, 2012Co-Authors: Barbara Brotschi, B. Grass, Markus Weiss, Carsten Doell, Vera BernetAbstract:Purpose To evaluate whether an in-line filter inserted in the syringe Pump infusion line assembly influences start-up times and flow irregularities during vertical Pump Displacement at low infusion rates. Methods Fluid delivery after syringe Pump start-up and after vertical Displacement of the syringe Pump by −50 cm was determined gravimetrically at flow rates of 0.5, 1.0 and 2.0 ml h^−1. Measurements were repeated for each flow rate four times with two different syringe Pumps with and without an in-line filter incorporated. Data are shown as median and range. Results Start-up times were reduced by an in-line filter at 0.5 ml h^−1 flow rate from 355.5 s (0–660) to 115 s (0–320), whereas the effect was attenuated at higher flow rates. Pooling of fluid into the infusion system after lowering the infusion syringe Pump was halved in all flow rates tested. Amount of infusion bolus after elevating the syringe Pump by 50 cm was not affected by an in-line filter. Conclusion In the evaluated model in-line filters help to reduce flow irregularities and delay in drug delivery of syringe Pumps at low flow rates and represent an option to optimize continuous administration of highly concentrated short-acting drugs at very small infusion rates.
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In-line filter included into the syringe infusion Pump assembly reduces flow irregularities
Intensive Care Medicine, 2012Co-Authors: Barbara Brotschi, B. Grass, Markus Weiss, Carsten Doell, Vera BernetAbstract:Purpose To evaluate whether an in-line filter inserted in the syringe Pump infusion line assembly influences start-up times and flow irregularities during vertical Pump Displacement at low infusion rates.
Huayong Yang - One of the best experts on this subject based on the ideXlab platform.
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Simulation analysis of pressure regulation of hydraulic thrust system on a shield tunneling machine
Frontiers in Mechanical Engineering, 2011Co-Authors: Huayong YangAbstract:Hydraulic thrust system is an important system in a shield tunneling machine. Pressure regulation of thrust cylinders is the most important function for thrust system during tunnel excavation. In this paper, a hydraulic thrust system is explained, and a corresponding simulation model is carried out in order to study the system characteristics. Pressure regulation of a certain group’s cylinders has little influence on regulation of the other groups’ cylinders. The influence will not affect the process much during tunnel excavation. Pump Displacement may have a greater effect on pressure regulation and oil supply flow rate should be adaptive to the system’s demand. A exacting situation is simulated to explain how pressure regulation works during tunnel excavation.
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ICIRA - Simulation Analysis of Pressure Regulation of Hydraulic Thrust System on a Shield Tunneling Machine
Intelligent Robotics and Applications, 2009Co-Authors: Huayong YangAbstract:Hydraulic thrust system is an important system on a shield tunneling machine. Pressure regulation of thrust cylinders is the most important function of thrust system during tunnel excavation. In this article, a hydraulic thrust system is illuminated, and a corresponding simulation model is carried out in order to study the system characteristics. Pressure regulation of a certain group's cylinders has a little influence of the other groups' cylinders. The influence will not affect the process much during tunnel excavation. Pump Displacement may have a great effect on the pressure regulation. Oil supply flow rate should be adaptive to the system demand. A tough situation is simulated to explain how the pressure regulation works during tunnel excavation.
