Analysis and Research on Mobile Drilling Rig for Deep Seabed Shallow Strata

2021 ◽  
Vol 55 (2) ◽  
pp. 81-93
Author(s):  
Ziqiang Ren ◽  
Feng Zhou ◽  
Hai Zhu ◽  
Peihao Zhang ◽  
Jiawang Chen ◽  
...  
Keyword(s):  
Control Method ◽  
Simulation Analysis ◽  
Mineral Resources ◽  
Propulsion System ◽  
Drilling Rig ◽  
Simulation Efficiency ◽  
Shallow Strata ◽  
Drilling Rigs ◽  
Differential Control ◽  
And Control

Abstract Drilling rigs for deep seabed shallow strata are commonly used to explore ocean cobalt-rich crust resources and other fields. This paper mainly presents the structure and mechanism of a mobile drilling rig for use in acquiring seafloor cores that are up to 1.5 m in length. The software Simcenter Amesim is used to establish the mobile drilling rig's hydraulic propulsion system model, which is the basis and a core part of the rig. Moreover, closed-loop and PID (proportion-integral-differential) control methods are separately used to control the hydraulic propulsion system for simulation analysis. Comparison of the simulation results shows that the PID control method is more convincing in verifying the design rationality of the hydraulic propulsion system. In the simulation of the PID-controlled hydraulic propulsion system, the co-simulation technology of Simcenter Amesim and MATLAB/Simulink not only establishes the hydraulic and control models but also determines the relevant simulation parameters, thereby helping improve system simulation efficiency. In its verification deployment in the South China Sea, the mobile drilling rig has been operated many times at different depths, and some cores have been successfully obtained. It was also used during the 55th Voyage of China Oceanic Scientific Expedition, which was supported by the China Ocean Mineral Resources R&D Association. Several sites were explored, and a large number of cobalt-rich crust cores were obtained. Theory and sea trials are explained to support further research on the survey of abyssal resources.

scholarly journals The Research on the Mobile Drilling Rig for Deep Seabed Shallow Strata

2020 ◽  
Author(s):  
Ziqiang Ren ◽  
Feng Zhou ◽  
Hai Zhu ◽  
Peihao Zhang ◽  
Jiawang Chen ◽  
...  
Keyword(s):  
Control Method ◽  
Simulation Analysis ◽  
Mineral Resources ◽  
Propulsion System ◽  
Solid Core ◽  
Drilling Rig ◽  
Simulation Efficiency ◽  
Operation Process ◽  
Shallow Strata ◽  
And Control

At present, the drilling rig for deep seabed shallow strata is widely used in the exploration of ocean cobalt-rich crust resources and other fields, which not only can obtain solid core samples at a specific station, but the operation process is relatively safe. This paper mainly presents the structure and mechanism of mobile drilling rig in acquiring the seafloor cores (up to 1.5 m long). Based on the function of the AMESim software, the hydraulic propulsion system model of mobile drilling rig is established, which is the basis and core part of the mobile drilling rig. Moreover, the control methods of closed-loop and PID are respectively used to control the hydraulic propulsion system for simulation analysis. Through the comparison of simulation results, it is found that the PID control method is more convincing in verifying the design rationality of hydraulic propulsion system. In the simulation of the PID-controlled hydraulic propulsion system, the co-simulation technology of AMESim and Matlab/Simulink not only establishes the hydraulic model and control model, but also determines the relevant simulation parameters, which is helpful to improve the system simulation efficiency. In its verification deployment in the South China Sea, the mobile drilling rig has been operated for many times at different depths, and some cores have been successfully obtained. Furthermore, the mobile drilling rig has been used during the 55th Voyage of China Oceanic Scientific Expedition supported by China Ocean Mineral Resources R&D Association. Several sites were explored and a large number of cobalt-rich crust cores were obtained. The powerful theory and sea trails are provided to support for the further research on survey of the abyssal resource.

A new type of drilling rig powered by the Meissner effect

2020 ◽  
pp. 31-34
Author(s):  
O. M. Koryagina ◽  
E. S. Erastova ◽  
T. V. Skvortsova
Keyword(s):  
Economic Efficiency ◽  
Meissner Effect ◽  
Propulsion System ◽  
Drilling Rig ◽  
New Type ◽  
Drilling Rigs

The article considers the use of the quantum levitation property of a superconductor for the modernization of a new type of drilling rig system. The diagrams of the propulsion system of the rig, on the basis of which conclusions are made about the profitability and economic efficiency of the drilling rig, are provided. The use of the quantum levitation effect can be rationally used in drilling rigs, increasing the efficiency by 9%.

On an ambulance stretcher suspension concerned with the reduction of patient's blood pressure variation

1997 ◽  
Vol 211 (2) ◽  
pp. 199-208 ◽  
Author(s):  
K Sagawa ◽  
H Inooka ◽  
E Ino-oka ◽  
T Takahashi
Keyword(s):  
Blood Pressure ◽  
Design Process ◽  
Control Method ◽  
Simulation Analysis ◽  
Pressure Variation ◽  
Continuous Control ◽  
Tilting Angle ◽  
Blood Pressure Variation ◽  
Safe Transport ◽  
And Control

The design process and control of an ambulance stretcher suspension to reduce patient's blood pressure variation (BPV) is discussed. The BPV caused by applying the vehicle brakes may lead to deterioration of a patient's condition. The proposed method can reduce BPV by tilting the stretcher and counterbalancing back-to-front acceleration of the ambulance with gravity. The experimental results obtained when using a manually controlled stretcher confirm that BPV is reduced by tilting the stretcher. A continuous control method that varies the tilting angle is investigated through simulation analysis. The results show that this control method reduces the BPV effectively and achieves safe transport of the patient.

Research on the Control Method of High Power APF for Oil Drilling Rig

2013 ◽  
Vol 734-737 ◽  
pp. 1450-1459
Author(s):  
Neng Qian Jiang ◽  
Ming Hua Zhu ◽  
Yi Feng Xie
Keyword(s):  
Control Strategy ◽  
Control Method ◽  
Electrical Equipment ◽  
Current Control ◽  
Harmonic Current ◽  
Oil Drilling ◽  
Drilling Rig ◽  
Harmonic Currents ◽  
Domain Transformation ◽  
And Control

The wide use of oil drilling rig brings nominated economic profits for oil drilling industry. However, it will bring about great quantities of harmonic current to the grid, lowering the power quality and reliability of the power grid. Meanwhile, harmonic currents will have a deteriorated influence to surrounding electrical equipment and grid. This paper studies the distribution characteristics of the harmonic current in the oil industry and puts forward a control strategy aiming for improving stability and reliability of the power supply system. This paper also proposes an algorithm for detecting harmonic current based on time domain transformation and control strategy based on two cascade (voltage and current) control loop. Experiment and simulation results validate the proposed control strategy.

Research on Desert Soil Moisture Measure & Control System

2012 ◽  
Vol 220-223 ◽  
pp. 1482-1486
Author(s):  
Shi Wei Li ◽  
Shuai Bing Li ◽  
Hai Ying Dong
Keyword(s):  
Soil Moisture ◽  
Control Method ◽  
Simulation Analysis ◽  
Dynamic Performance ◽  
Desert Soil ◽  
Moisture Sensor ◽  
Frequency Domain Reflectometry ◽  
Threshold Switch ◽  
Adaptive Pid Control ◽  
And Control

For the purpose of meeting the desert soil moisture easurements and control requirements accurately, a soli moisture control model is set in this paper. As the system is of delay and nonlinear characteristics, we used a frequency domain reflectometry (FDR) principle moisture sensor to measure the desert soil in tratification and a threshold switch fuzzy adaptive PID control method is taken in order to get a highly dynamic performance. Additionally, We made an experiment and a simulation analysis, The results show that the measure and control method we used not only has a strong robustness, but also can quickly and accurately detect and control the sand pit soil moisture.

Perencanaan Pengendalian Kualitas Produk Pakaian Bayi dengan Metode Six Sigma Pada CV. AGP

JEMAP ◽  
2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Albertus Reynaldo Kurniawan ◽  
Bayu Prestianto
Keyword(s):  
Quality Control ◽  
Continuous Improvement ◽  
Six Sigma ◽  
Screen Printing ◽  
Control Method ◽  
Operational Performance ◽  
Machine Maintenance ◽  
Quality Product ◽  
Break Time ◽  
And Control

Quality control becomes an important key for companies in suppressing the number of defective produced products. Six Sigma is a quality control method that aims to minimize defective products to the lowest point or achieve operational performance with a sigma value of 6 with only yielding 3.4 defective products of 1 million product. Stages of Six Sigma method starts from the DMAIC (Define, Measure, Analyze, Improve and Control) stages that help the company in improving quality and continuous improvement. Based on the results of research on baby clothes products, data in March 2018 the percentage of defective products produced reached 1.4% exceeding 1% tolerance limit, with a Sigma value of 4.14 meaning a possible defect product of 4033.39 opportunities per million products. In the pareto diagram there were 5 types of CTQ (Critical to Quality) such as oblique obras, blobor screen printing, there is a fabric / head cloth code on the final product, hollow fabric / thin fabric fiber, and dirty cloth. The factors caused quality problems such as Manpower, Materials, Environtment, and Machine. Suggestion for consideration of company improvement was continuous improvement on every existing quality problem like in Manpower factor namely improving comprehension, awareness of employees in producing quality product and improve employee's accuracy, Strength Quality Control and give break time. Materials by making the method of cutting the fabric head, the Machine by scheduling machine maintenance and the provision of needle containers at each employees desk sewing and better environtment by installing exhaust fan and renovating the production room.

An Efficient Approach for Modeling and Control of a Quadrotor

2016 ◽  
Vol 4 (2) ◽  
pp. 1-16
Author(s):  
Ahmed S. Khusheef
Keyword(s):  
Pid Control ◽  
Control Method ◽  
Mechanical Design ◽  
Loop Control ◽  
Modeling And Control ◽  
Loop Control System ◽  
And Control ◽  
Close Loop Control ◽  
Close Loop Control System ◽  
Made In

 A quadrotor is a four-rotor aircraft capable of vertical take-off and landing, hovering, forward flight, and having great maneuverability. Its platform can be made in a small size make it convenient for indoor applications as well as for outdoor uses. In model there are four input forces that are essentially the thrust provided by each propeller attached to each motor with a fixed angle. The quadrotor is basically considered an unstable system because of the aerodynamic effects; consequently, a close-loop control system is required to achieve stability and autonomy. Such system must enable the quadrotor to reach the desired attitude as fast as possible without any steady state error. In this paper, an optimal controller is designed based on a Proportional Integral Derivative (PID) control method to obtain stability in flying the quadrotor. The dynamic model of this vehicle will be also explained by using Euler-Newton method. The mechanical design was performed along with the design of the controlling algorithm. Matlab Simulink was used to test and analyze the performance of the proposed control strategy. The experimental results on the quadrotor demonstrated the effectiveness of the methodology used.

Modeling and Control of Hybrid Propulsion System for Ground Vehicles

2018 ◽  
Author(s):  
Yuan Zou ◽  
Junqiu Li ◽  
Xiaosong Hu ◽  
Yann Chamaillard
Keyword(s):  
Propulsion System ◽  
Ground Vehicles ◽  
Hybrid Propulsion ◽  
Modeling And Control ◽  
And Control
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