Simulation of gamma-ray distribution in rocks for determining the registration characteristics of measurement unit of horizontal borehole positional control system

2019 ◽  
Vol 1 (1) ◽  
pp. 015019
Author(s):  
E V Golodnykh ◽  
V N Borikov ◽  
S V Uchaikin
Keyword(s):  
Control System ◽  
Gamma Ray ◽  
Measurement Unit ◽  
Positional Control

A data acquisition and control system for high-speed gamma-ray tomography

2008 ◽  
Vol 19 (9) ◽  
pp. 094012 ◽  
Author(s):  
B T Hjertaker ◽  
R Maad ◽  
E Schuster ◽  
O A Almås ◽  
G A Johansen
Keyword(s):  
Control System ◽  
Data Acquisition ◽  
High Speed ◽  
Gamma Ray ◽  
And Control

The position of regenerating cambia: auxin/sucrose ratio and the gradient induction hypothesis

1978 ◽  
Vol 203 (1151) ◽  
pp. 153-176 ◽  
Keyword(s):  
Control System ◽  
Induction Hypothesis ◽  
Sucrose Concentration ◽  
Vascular Differentiation ◽  
Concentration Gradients ◽  
Published Evidence ◽  
Different Types ◽  
Source And Sink ◽  
Positional Control

To account for the positions in which vascular cambia regenerate in wound callus, a gradient induction hypothesis was proposed in 1961 in terms of gradients in ‘some factor as yet unknown’. It now seems likely that the gradient is based on morphogen diffusion between source and sink on opposite sides of existing cambia, with morphogen diffusing into the adjoining wound callus. It is specifically proposed that there are two morphogens, auxin diffusing centrifugally and sucrose diffusing centripetally. The cambium then regenerates along a path where the ratio of auxin to sucrose concentration is similar to that at the original cambium, and its orientation (as regards xylem and phloem formation) is determined by the direction of the gradient in this ratio. These proposals are supported by published evidence on auxin and sucrose concentration gradients across the cambium, and on their sources, movements, and known effects on vascular differentiation. Simulations of the proposed positional control system predict patterns of cambial regeneration and orientation corresponding to those observed in four different types of would and graft.

scholarly journals Implementation of the centralized control system for drone training

2018 ◽  
Vol 7 (3.3) ◽  
pp. 379
Author(s):  
Bong Hyun Kim
Keyword(s):  
Control System ◽  
Angular Velocity ◽  
Embedded System ◽  
Flight Control ◽  
Attitude Control ◽  
Test System ◽  
Measurement Unit ◽  
Centralized Control ◽  
Structural Problems ◽  
Earth Magnetic Field

Background/Objectives: The drones became a representative item in the IoT era. However, there is no drone pilot test system that can safely train this in the education field. Drones have very dangerous structural problems, so it is very necessary to practice them easily. Therefore, it is necessary to develop a system that can control the drones safely and easily while controlling them.Methods/Statistical analysis: In this paper, we will develop software for controlling a dedicated board platform that can securely perform ground testing by mounting four drones of motor and drive on a board (PCB). To this end, we supported various control IMU (Inertial Measurement Unit) boards for attitude control by using sensor which is the core technology of drone flight control. Also, Acceleration Data, Angular Velocity Data, Earth Magnetic Field Data, and Atmospheric Pressure Data for maintaining the altitude were used for the drone flight.Findings: In the implemented central control system, the AT chip is built in and designed to perform all control related to the flight of the drone. In addition, since it is an embedded system, we have programmed the attitude control using the sensor, the motor output setting, and the controller connection information. The CPU required for drones control can be replaced with various types of controllers besides Fno Arduino, UNO, Muiltiwii. For this purpose, the main PCB is designed so that the power supply terminal can be used for each CPU. Finally, it was developed as a setup program to correct the sensor and output of the drone.Improvements/Applications: The system implemented in this paper can easily control the drone. In addition, acceleration, angular velocity, geomagnetic field, air pressure sensor, GPS, etc. necessary for drone control can be utilized by stabilizing the initial set value. In other words, the zero point of the sensor can be captured and the signal appropriate to the current state of the drone can be stored in the processor.  

Design of Quadrotor’s Control System Based on DSP

2014 ◽  
Vol 989-994 ◽  
pp. 3216-3219
Author(s):  
Qiang Lv ◽  
Pei Pei Ni ◽  
Guo Sheng Wang ◽  
Feng Liu
Keyword(s):  
Control System ◽  
Attitude Control ◽  
High Speed ◽  
Measurement Unit ◽  
Infrared Range ◽  
Attitude Control System ◽  
Processing Capability ◽  
Ground Station ◽  
Optical Flow Sensor ◽  
Wireless Module

A problem of quadrotor’s control system based on DSP is investigated in this paper. STMS320F28335 is used as the main processer, due to its advantages of high-speed processing capability and powerful floating point processing capability. The inertial measurement unit is selected for inner-loop attitude control, while the optical flow sensor is adopted for outer-loop attitude compensation. Infrared range finder is choosed for altitude control with PID method. Quadrotor uses XBee-Pro wireless module to contact with ground station and sends statement information in accordance with the Mavlink protocol. Test results show that the control system is reliable and can meet the requirement of the attitude control system.

scholarly journals Điều khiển thích nghi vị trí trên cơ sở kỹ thuật vi xử lý Phần I: Hệ thống điều chỉnh vị trí nhờ quan sát và phản hồi trạng thái

2018 ◽  
Vol 5 (4) ◽  
pp. 10-16
Author(s):  
Pham Huy Thoa
Keyword(s):  
Control System ◽  
Feedback Control ◽  
Control Problem ◽  
Control Algorithm ◽  
Position Control ◽  
The State ◽  
Control Algorithms ◽  
State Variable ◽  
Load Characteristics ◽  
Positional Control

  In order to investigate different position control algorithms for numerical controlled machines and robots, a positional control system was built on the base of  a microcomputer. In part I, the paper presents the  observer algorithm for  state variable estimation and the state variable feedback control algorithm applied to the position control of a  particular machine-table. With the hardware and software structure of the microcomputer based digital system described in this paper different control algorithms can be  realized flexibly. The position control problem for the plant with variations or  uncertainties of  parameters and load characteristics will be reported in part II.

scholarly journals FIToplankton: Wireless Controlled Remotely-operated Underwater Vehicle (ROV) for Shallow Water Exploratio

2018 ◽  
Vol 8 (5) ◽  
pp. 3325 ◽  
Author(s):  
Muhammad Ikhsan Sani ◽  
Simon Siregar ◽  
Aris Pujud Kurniawan ◽  
M. Abid Irwan
Keyword(s):  
Control System ◽  
Shallow Water ◽  
Power Distribution ◽  
Inertial Measurement Unit ◽  
Measurement Unit ◽  
Maximum Deviation ◽  
Underwater Communication ◽  
Remotely Operated Vehicle ◽  
Umbilical Cable ◽  
Underwater Exploration

Remotely Operated Vehicle (ROV) for underwater exploration is typically controlled using umbilical cable connected to ground control station. Unfortunately, while it’s used for power distribution and data transmission, it also obstruct the movement of ROV especially for shallow water (<50 cm). This paper proposed an alternative method for controlling ROV using wireless remote control system. This work also aims to explore the possibility of using RF wireless technology between 420-450 MHz as underwater communication system. Furthermore, the control system was used to manage actuators i.e. DC motor and bilge pump for maneuvring and picking small size cargo. To help the ROV to hold on a desired, Inertial Measurement Unit (IMU) is installed on board ROV within maximum deviation 0.2 m/s2. The prototype of the system has been successfully implemented and evaluated to confirm the  functionality and the feasibility of the proposed approach.

Optimization of the Positional Control System for Electrical Drives of Non-Supported Pendulum Suspended Ropeways

2021 ◽  
Author(s):  
Badur Tchunashvili ◽  
Mamuka Kobalia ◽  
Alexander Petrosyan ◽  
Revaz Gurgenadze ◽  
Giorgi Bulbulashvili
Keyword(s):  
Control System ◽  
Electrical Drives ◽  
Positional Control

Management and Maintenance on CT, MRI, Gamma-Ray Radiotherapy Instrument

2014 ◽  
Vol 651-653 ◽  
pp. 1599-1602
Author(s):  
Jian Kun Wang
Keyword(s):  
Quality Control ◽  
Control System ◽  
Medical Equipment ◽  
Gamma Ray ◽  
Medical Profession ◽  
Quality Control System ◽  
Equipment Management ◽  
Medical Field ◽  
New Ideas ◽  
Medical Process

Medical Equipment, such as CT, MRI, Gamma-ray Radiotherapy Instrument, play an increasingly important role in modern medical field. While, this medical equipment cannot be managed and maintained well in some hospital. If the problems are still remained in the medical process, it will not only affect the health of patients, but also hamper the development of the medical profession. Therefore, to establish a scientific and reasonable quality control system of medical equipment is to be solved. This article analyzed to causes and background of strengthening the medical devices quality control system all over our country, put forward the new ideas for building the medical equipment quality control system, and elaborate how to strengthen the medical equipment quality control system for medical equipment management and maintenance.

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