An Air Pressure Control Method for Fast and Precise Inspection on Triple Action Pressure Sensors

In recent years, the research and development of 3D bioprinting device for artificial blood vessels has attracted great attention of researchers. In this paper, the research object is the control system of 3D bioprinting device for artificial blood vessel and the four-channel air pressure cooperative control technology for 3D bioprinting device double nozzles printing is mainly studied. Through the scheme design, working principle innovation, hardware selection and air pressure output calibration experiment of four-way air pressure cooperative control system, the hardware platform of 3D bioprinting device air pressure control system is built. Then, by using the embedded TwinCAT NC PTP software platform based on EtherCAT Ethernet bus protocol, the four-channel air pressure cooperative control is programmed and field experiments are carried out, which realizes the printing process of uniform liquid output and good continuity, and meets the requirements of 3D bioprinting for printing continuity and forming quality. The study of four-channel air pressure cooperative control system in this course is a worthy of application and promotion control method.

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Pressure Control Method of Work Chamber of Shield Machine Based on Dynamic Pressure Balance

Journal of Mechanical Engineering ◽

10.3901/jme.2014.21.038 ◽

2014 ◽

Vol 50 (21) ◽

pp. 38

Author(s):

Wei SUN

Keyword(s):

Control Method ◽

Dynamic Pressure ◽

Pressure Control ◽

Pressure Balance ◽

Shield Machine ◽

Work Chamber

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Stable Switching Control Strategy of the Support Pressure and Velocity of Shield Machine Gripper Shoes

Shock and Vibration ◽

10.1155/2019/6108796 ◽

2019 ◽

Vol 2019 ◽

pp. 1-8

Author(s):

Nannan Liu ◽

Jishen Peng ◽

Liye Song ◽

Pinhe Wang ◽

Kun Zhang

Keyword(s):

Position Control ◽

Control Method ◽

Control Strategies ◽

Pressure Control ◽

Surrounding Rock ◽

Support Pressure ◽

Hydraulic Pressure ◽

Compound Control ◽

Hydraulic Servo ◽

Shield Machine

An electro-hydraulic servo position and pressure compound control method was investigated considering the working principle of a hydraulic stepping motor of a shield machine gripper shoe and its practical working characteristics in the supporting process. The control targets were to improve the support efficiency and reduce the disturbance of gripper shoes on the surrounding rock. In this method, a fuzzy switching controller was used to switch between electro-hydraulic position control and electro-hydraulic pressure control. Numerical and prototype simulation experiments were conducted on the control method. The theoretical analysis and experimental results showed that the control method could effectively convert the gripper shoes from an unsupported state to a supported state in a short amount of time, as well as realize surge-free switching between position control and pressure control. Thus, disturbance of the gripper shoes on the surrounding rock could be reduced. The results of this study provide a theoretical basis for research on control strategies of hydraulic stepping propulsion of shield machines.

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Experimental analysis of the thermal stability of the pressure control method for a variable flow air-conditioning water system

Building and Environment ◽

10.1016/j.buildenv.2013.07.012 ◽

2013 ◽

Vol 70 ◽

pp. 1-9 ◽

Cited By ~ 4

Author(s):

Zhao Tianyi ◽

Zhang Jili ◽

Ma Liangdong

Keyword(s):

Thermal Stability ◽

Experimental Analysis ◽

Air Conditioning ◽

Control Method ◽

Water System ◽

Pressure Control ◽

Variable Flow ◽

Thermal Stability Of

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Research on the Key Technology of NC Abrasive Belt Grinding for the Leading and Trailing Edges of Aeroengine Blades

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.565.76 ◽

2012 ◽

Vol 565 ◽

pp. 76-81 ◽

Cited By ~ 2

Author(s):

Yun Huang ◽

Xiao Xiao Ye ◽

Ming De Zhang ◽

Hong Wen Fang

Keyword(s):

Control Method ◽

Dimensional Accuracy ◽

Pressure Control ◽

Grinding Process ◽

Belt Grinding ◽

Key Technology ◽

Abrasive Belt ◽

Model Research ◽

Trailing Edges ◽

Blade Machining

This document provides an analysis of the structure characteristics and grinding process requirements of leading and trailing edges, and proposes a grinding process of leading and trailing edges, established a uneven grinding margin model, research the quantitative grinding pressure control method of uneven margin, as well as the error compensation technology of blade machining deformation, and experiments were carried out on the basis of theories above. The experimental results demonstrate that: after grinding, the edge roundness improved greatly, dimensional accuracy of edge radius can reach ±0.07mm.Compared with the traditional manual polishing method, the grinding quality improved significantly.

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Control and Optimization of Negative Pressure in Scrap Copper Smelting

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.103.399 ◽

2011 ◽

Vol 103 ◽

pp. 399-403

Author(s):

Ying Dao Li ◽

Wei Hong Zhong ◽

Hong Wei Guan ◽

Xiu Shui Ma

Keyword(s):

Pid Control ◽

Negative Pressure ◽

Control Method ◽

Control Variable ◽

Pressure Control ◽

Copper Smelting ◽

Smelting Process ◽

Adjustment Process ◽

Optimization Control

Negative pressure is the main control variable in scrap copper smelting process, the control of negative pressure is not only closely related with producing safely, but also produces a direct impact on the quality of the anode plate, it is also a key breakthrough in energy saving. This paper first analyses the characteristics of negative pressure control in scrap copper smelting process, aims to larger overshoot and longer regulation under conventional PID control method, and then utilizes fuzzy control to correct the PID parameters online, to achieve the optimization control of negative pressure. Simulation result shows that the adjustment process of optimized control of negative pressure is steady and rapid, usually no or slightly overshoot, and the settling time is also reduced significantly.

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