scholarly journals Development of a new type of high pressure calorimetric cell, mechanically agitated and equipped with a dynamic pressure control system: Application to the characterization of gas hydrates

2013 ◽  
Vol 84 (12) ◽  
pp. 125107 ◽  
Author(s):  
F. Plantier ◽  
L. Marlin ◽  
D. Missima ◽  
J.-P. Torré
Keyword(s):  
High Pressure ◽  
Control System ◽  
Gas Hydrates ◽  
System Application ◽  
Dynamic Pressure ◽  
Pressure Control ◽  
Calorimetric Cell ◽  
Pressure Control System ◽  
New Type

Fully predictive Common Rail fuel injection apparatus model and its application to global system dynamics analyses

2016 ◽  
Vol 18 (3) ◽  
pp. 273-290 ◽  
Author(s):  
Alessandro Ferrari ◽  
Pietro Pizzo
Keyword(s):  
High Pressure ◽  
Control System ◽  
Fuel Injection ◽  
Time History ◽  
Pressure Control ◽  
Rail Pressure ◽  
High Pressure Pump ◽  
Pressure Time ◽  
Pressure Control System ◽  
Injection Apparatus

A fully predictive model of a Common Rail fuel injection apparatus, which includes a detailed simulation of rail, pump, piping system, injectors and rail pressure control system, is presented and discussed. The high-pressure pump and injector sub-models have been validated separately and then coupled to the rail and pressure control system sub-models. The complete predictive model has been validated and applied to investigate the effects of the dynamics of each component of the injection apparatus on the rail pressure time history. Variable timing of the high-pressure pump delivery phases has also been considered, and the influence of this parameter on the injection performance has been analysed for both single- and multiple-injection events. Furthermore, the injection system dynamics during the transients between steady-state working conditions has been investigated in order to highlight the role played by the dynamic response of the pressure control system on the rail pressure time history.

The Design of the Piston-Cylinder High Temperature and High Pressure Control System

2012 ◽  
Vol 462 ◽  
pp. 464-467 ◽  
Author(s):  
Jian Hua Rao ◽  
Xiao Kang Liu ◽  
Dong Mei Zhou
Keyword(s):  
High Pressure ◽  
Control System ◽  
High Temperature ◽  
Pressure Control ◽  
Piston Cylinder ◽  
Deep Earth ◽  
Pressure Control System ◽  
Actual Operation ◽  
Operation Results ◽  
Multi Mode

Piston cylinder high temperature and high pressure (HTHP) apparatus is a most important instrument for studying deep earth processes and other HTHP experiments. But the apparatus with basic configuration require improvement. A new temperature and pressure automatic control system is present in the paper, and the system operating software is developed based on LabVIEW. The new control system realizes the pressure and the temperature working in the multi-mode, which improves the applicability. Experiment data and operating state are real-time displayed and recorded. The software has encryption protection and alert functions. Actual operation results show that the system has the good performance of following the setting curves and robustness.

scholarly journals Designing Control System of Hypersonic Vehicle with Dynamic Pressure Constraints Considered

2019 ◽  
Vol 37 (1) ◽  
pp. 41-47
Author(s):  
Hongyang Xu ◽  
Yonghua Fan ◽  
Xi Tong ◽  
Jie Yan
Keyword(s):  
Control System ◽  
Optimal Control Theory ◽  
Dynamic Pressure ◽  
Pressure Control ◽  
Hypersonic Vehicle ◽  
State Equations ◽  
Integral Control ◽  
Pressure Control System ◽  
Scramjet Engine ◽  
Simulation Results

An airbreathing hypersonic vehicle(AHV) generally adopts a scramjet engine as its propulsion, which needs strict conditions of flight dynamic pressure. A new dynamic pressure control system is presented, in which the AHV autopilot directly uses dynamic pressure to track the dynamic pressure command. Firstly, the dynamic pressure model of the AHV is established and the state equations of dynamic pressure control are given. Then, the dynamic pressure control system is implemented using the LQR optimal control theory. The dynamic pressure error is augmented in order to add an integral control to track the dynamic pressure with zero steady error. The structure of the dynamic pressure control system is also obtained. The simulation results show that the dynamic pressure control system has a good performance for guaranteeing the dynamic pressure of the scramjet engine with the disturbance of drag and thrust considered.

PRESSURE CONTROL SYSTEM AT CEMENTATION OF WELLS

2017 ◽  
pp. 62-67
Author(s):  
V. G. Kuznetsov ◽  
O. A. Makarov
Keyword(s):  
Control System ◽  
Oil And Gas ◽  
Pressure Control ◽  
Poor Quality ◽  
Technical Solution ◽  
Cement Slurry ◽  
Automated Control ◽  
Injection Speed ◽  
Pressure Control System ◽  
Effective Life

At cementing of casing of oil and gas wells during the process of injecting of cement slurry in the casing column the slurry can move with a higher speed than it’s linear injection speed. A break of continuity of fluid flow occurs, what can lead to poor quality isolation of producing formations and shorten the effective life of the well. We need to find some technical solution to stabilize the linear velocity of the cement slurry in the column. This task can be resolved with an automated control system.

Development of a Pressure Control System for Brace Treatment of Scoliosis

2012 ◽  
Vol 20 (4) ◽  
pp. 557-563 ◽  
Author(s):  
Eric Chalmers ◽  
Edmond Lou ◽  
Doug Hill ◽  
Vicky H. Zhao ◽  
Man-Sang Wong
Keyword(s):  
Control System ◽  
Pressure Control ◽  
Brace Treatment ◽  
Pressure Control System
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