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.

scholarly journals An Application of the Optimal Control Theory to the OG Pressure Control System

1984 ◽  
Vol 70 (9) ◽  
pp. 1256-1261
Author(s):  
Toshio INOUE ◽  
Takeya FUKUMOTO ◽  
Shigeharu KAWAI ◽  
Kenta YOSHII ◽  
Tsuyoshi TACHIBANA
Keyword(s):  
Optimal Control ◽  
Control System ◽  
Control Theory ◽  
Optimal Control Theory ◽  
Pressure Control ◽  
Pressure Control System

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

Real-Time Micro-Fluidic Chip Pressure Control System Base on the Optical Interference

2014 ◽  
Vol 494-495 ◽  
pp. 1274-1277
Author(s):  
Kan Liu ◽  
Hao You
Keyword(s):  
Control System ◽  
Real Time ◽  
Measurement System ◽  
Interference Fringe ◽  
Pressure Control ◽  
Measured Data ◽  
Optical Interference ◽  
Interference Fringes ◽  
Pressure Control System

This article introduces a measurement system based on LabVIEW used for optical interference fringe on micro-fluidic chips. This system mainly uses cameras to capture real-time images of wedge interference fringe on micro-fluidic chips, then the collected images will be binarized by LabVIEW. The processed images will be divided by zone , determine the flatness and gap thickness of the micro-fluidic chips by interference fringes with different directions of deflection and numbers. Finally, feedback from measured data will be used to adjust the flatness and gap thickness of micro-fluidic chips in order to meet the requirement of tests.

Fuzzy Control-Based Air-Compressor Constant Pressure Gas Intelligent Control

2011 ◽  
Vol 230-232 ◽  
pp. 187-191
Author(s):  
Gong Fa Li ◽  
Si Qiang Xu ◽  
Jin Hui Wang ◽  
Jin Tang Yang ◽  
Jian Yi Kong ◽  
...  
Keyword(s):  
Control System ◽  
Fuzzy Control ◽  
Constant Pressure ◽  
Pressure Control ◽  
Air Compressor ◽  
Time Varying Delay ◽  
Important Sense ◽  
Pressure Control System ◽  
Working Characteristic ◽  
Varying Delay

The air compressor system is a time-varying, delay and nonlinear complex system, it has a very important sense to ensure that the supply pressure is stable in the compressor control system. According to the working characteristic of air compressor system, the fuzzy control theory, as one of the modern control theories, was applied into the constant pressure control system to design a fuzzy pressure controller. The simulation results show that the controller was more convenient and effective; it has certain directive significance and reference for the other parameter’s control of air compressor system.

The Liquid Surface Pressure Control System for Low Pressure Die Casting Based on Fuzzy PID

2013 ◽  
Vol 706-708 ◽  
pp. 1063-1067
Author(s):  
Hai Feng Lin ◽  
Liu Qing Du ◽  
Li Ping Xiong
Keyword(s):  
Control System ◽  
Surface Pressure ◽  
Liquid Surface ◽  
Die Casting ◽  
Pressure Control ◽  
Low Pressure ◽  
Fuzzy Pid ◽  
Low Pressure Die Casting ◽  
Pressure Control System ◽  
Pressure Die Casting

The Liquid Surface Pressure Control is the key factor for the guarantee of Low Pressure Die Casting Quality. Regarding to the disadvantages of conventional PID Control such as pressure fluctuation, poor repeatability of the pressure curve, and so on, we propose Liquid Surface Pressure Control System (LSPCS) based on Fuzzy Adaptive PID. Design method of Fuzzy PID Controller has been discussed, and the realization methods of the hardware and software in this system are developed. This proposed system has a good performance in practice.

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