scholarly journals Five-Hundred-Meter Aperture Spherical Telescope Project

2001 ◽  
Vol 182 ◽  
pp. 219-224 ◽  
Author(s):  
B. Peng ◽  
R. Nan ◽  
Y. Su ◽  
Y. Qiu ◽  
L. Zhu ◽  
...  
Keyword(s):  
Control System ◽  
Southwest China ◽  
Karst Area ◽  
Spherical Reflector ◽  
Paraboloid Of Revolution ◽  
Square Kilometer Array ◽  
The Cost ◽  
And Control ◽  
Electronic Technologies ◽  
Feed Support System

AbstractA Five hundred meter Aperture Spherical Telescope (FAST) is proposed to be built in the unique karst area of southwest China, and will act, in a sense, as a prototype for the Square Kilometer Array (SKA). It will be over twice as large as the Arecibo telescope coupled with much wider sky coverage. Some results from site surveys for such a SKA concept are briefly reported. Technically, FAST is not simply a copy of the existing Arecibo telescope but has rather a number of innovations. Firstly, the proposed main spherical reflector, by conforming to a paraboloid of revolution in real time through actuated active control, enables the realization of both wide bandwidth and full polarization capability while using standard feed design. Secondly, a feed support system which integrates optical, mechanical and electronic technologies will effectively reduce the cost of the support structure and control system. Pre-research on FAST has become a key project in the CAS.

scholarly journals The Development of the FAST Project in China

2002 ◽  
Vol 199 ◽  
pp. 494-497
Author(s):  
R. Nan ◽  
B. Peng ◽  
Y. Qiu ◽  
L. Zhu ◽  
Y. Su ◽  
...  
Keyword(s):  
Radio Astronomy ◽  
Southwest China ◽  
Karst Area ◽  
Broad Bandwidth ◽  
Spherical Reflector ◽  
Effective Aperture ◽  
Square Kilometer Array

Acting as a pilot of the Square Kilometer Array (SKA), the Five hundred meter Aperture Spherical Telescope (FAST) has been proposed for construction in the unique karst area of southwest China. FAST is of Arecibo-type with rather a number of innovations, among which the active main spherical reflector shows fascinating. Furthermore, the feed cabin is supported and moved by cables controlled by computer, which avoids a heavy and expensive focal pointing system. With the effective aperture of 300 m, a large sky coverage, and a broad bandwidth (200 to 2000 MHz), possible capability up to 5 ∼8 GHz, FAST will be the world's largest single dish and perform markedly role in radio astronomy.

Evaluating the Possibility to Implement Autonomous Power Supply from a Hydrogenerator as Applied to Dispatching Systems for Housing and Utility Services

Vestnik MEI ◽  
2020 ◽  
Vol 6 (6) ◽  
pp. 67-75
Author(s):  
Georgiy G. Ilyin ◽  
Keyword(s):  
Control System ◽  
Water Supply ◽  
Power Supply ◽  
Large Diameter ◽  
Supply Networks ◽  
Periodic Maintenance ◽  
Utility Services ◽  
Storage Batteries ◽  
The Cost ◽  
And Control

Currently, we are witnessing active development of urban building construction, which dictates new requirements for the infrastructure of water supply and sanitation. These requirements are aimed at improving the reliability and compliance with stringent environmental standards. Dispatch supervision and control of water supply networks are among the key tasks that have to be solved under such conditions. The problem of implementing such systems lies in difficulty of setting up power supply to the equipment used in these systems. The power supply of such systems is as a rule provided by using storage batteries, which entails the need for periodic maintenance of these systems and thereby increases the cost of their operation. The problem can be solved by using an autonomous source of electricity. The energy of the water flow in the pipeline is proposed to be used as such source. The possibility of setting up an autonomous dispatch control system for housing and utility services based on a hydrogenerator is estimated. The study is carried out by analyzing the hydraulic parameters of a bypass pipeline installed on a large-diameter pipeline. To determine the flow velocity and pressure in the bypass pipeline, the fluid flow is modeled in it. The modeling results and their subsequent analysis made it possible to calculate the range of power produced by the hydrogenerator and estimate the possibility of setting up an autonomous dispatch control system.

scholarly journals Management Accounting and Control System

NCC Journal ◽  
2018 ◽  
Vol 3 (1) ◽  
pp. 153-166
Author(s):  
Rewan Kumar Dahal
Keyword(s):  
Control System ◽  
Balanced Scorecard ◽  
Value Chain ◽  
Management Accounting ◽  
Evaluation Process ◽  
Monitoring And Control ◽  
Use Of Resources ◽  
The Cost ◽  
And Control ◽  
Technical Considerations

A larger entity of the cost management system which assists executives in fulfilling organizational objectives is known as management accounting and control system (MACS). It is used for planning, monitoring and control of different organizational activities, to optimize the use of resources, to support the process of decision making and to the performance evaluation process. The scope of the MACS can be divided into two broad groups: technical considerations and behavioral considerations. Technical considerations fall into two categories: (i) the relevance of information generated and (ii) the scope of the system like the value chain, total life cycle costing, target costing, kaizen costing, benchmarking, balanced scorecard etc. whereas the behavioral consideration involves individuals and their behavior within organizations.NCC JournalVol. 3, No. 1, 2018, Page: 153-166

“Target-Operation” Cost Management Model

2011 ◽  
Vol 204-210 ◽  
pp. 1022-1025
Author(s):  
Jing Pu Chen ◽  
Wei Wei Wang
Keyword(s):  
Control System ◽  
Cost Control ◽  
Cost Management ◽  
Full Range ◽  
Functional Modules ◽  
Target Cost ◽  
The Cost ◽  
And Control ◽  
Auxiliary Module ◽  
Operation Cost

Objective cost management and Activity-Based cost management are both more advanced cost management methods, but they are difficult to overcome their own shortcomings. In order to overcome the defects of these two methods of cost management, in the meanwhile, to find a new way to perfect the cost control system in enterprise, the writer planned to make this study. By analyzing and summarizing the domestic and international research results based on the integration of the Objective cost management and Activity-Based cost management, the writer pointed out the lack of current research and raised from the development, design, procurement, production and service to the full range of “Target-Operation” cost management, and designed three functional modules, including target cost estimate module, operation chain optimization module, cost breakdown and control module and auxiliary module to improve the model's content. This study offers a new way for the managers of enterprises in the field of cost control system and strengthening enterprise competitive power.

scholarly journals Design of a grasping robot control system using kinematics model

2021 ◽  
Vol 2083 (2) ◽  
pp. 022031
Author(s):  
Wenqi Chen ◽  
Fenggang Liu
Keyword(s):  
Control System ◽  
Real Time ◽  
Process Design ◽  
Robot Control ◽  
Production Efficiency ◽  
Object Control ◽  
The Cost ◽  
And Control ◽  
The Competitiveness Of Enterprises ◽  
Robot Control System

Abstract Aiming at the problem of mechanized and repeated parts grasping, and aiming to reduce the development cost, this study added an end-effector and designed a ROS-based grasping robot control system on the basis of fully analyzing the structure and workflow of the robot. The grasping robot can be controlled and monitored in real time by operating on the RVIZ interface. According to the needs and process of grasping work, the control system process design and control system programming of the robot are completed. Subsequent simulation experiments and real object control experiments show that the control system has high robustness and real-time performance. The control system can meet the task of mechanization and repeated parts grasping, and can effectively improve the production efficiency, enhance the competitiveness of enterprises, and reduce the cost of enterprises.

Selection of variables using factorial discriminant analysis for the state identification of an anaerobic UASB–UAF hybrid pilot plant, fed with winery effluents

2007 ◽  
Vol 56 (2) ◽  
pp. 139-145 ◽  
Author(s):  
M. Castellano ◽  
G. Ruiz-Filippi ◽  
W. González ◽  
E. Roca ◽  
J.M. Lema
Keyword(s):  
Wastewater Treatment ◽  
Control System ◽  
Pilot Plant ◽  
Monitoring And Control ◽  
Wastewater Treatment Process ◽  
Monitoring And Control System ◽  
Selection Of Variables ◽  
Wide Range ◽  
The Cost ◽  
And Control

Anaerobic wastewater treatment has become a widely used method for wastewater depuration, and has been applied in a wide range of situations, from urban wastewater to highly toxic industrial wastewater. Particularly it has been successfully applied to the treatment of the beverage industries effluents. To avoid the destabilization of the system a monitoring diagnosis and control system of the depuration processes is necessary. The cost of this system is an important issue, that depends on the number of parameters that must be controlled for an adequate performance of a wastewater plant control system. This work shows how the classic statistical classification techniques can be applied to determine the number variables that must be monitored to achieve an adequate performance of anaerobic UASB–UAF hybrid Pilot Plant monitoring and control system. The obtained results had not been unique, so different combinations of variables can be selected for a good wastewater treatment process control. Economic or technical criteria may be considered to determine the final variables set in each particular situation.

scholarly journals Sistema de Monitoreo y Control Automatizado de Nivel para Contenedores de Líquidos no Corrosivos, de Uso Doméstico y Comercial

2019 ◽  
pp. 1-8
Author(s):  
Alejandro Báez-Ibarra ◽  
Mario Enríquez-Nicolás ◽  
Francisco Antonio Luna-Salinas ◽  
Guadalupe Rojas-Santos
Keyword(s):  
Control System ◽  
Execution Time ◽  
Technological Progress ◽  
Monitoring And Control ◽  
Monitoring And Control System ◽  
Commercial Use ◽  
Management Processes ◽  
The Cost ◽  
And Control ◽  
Selection Of

The automation of processes today is one of the present needs in society as a result of the inefficiency that results from carrying out certain tasks without mechanisms that optimize them, whether due to time, efficiency, and in general All the technological progress that we already have, these mechanisms have become obsolete. This document shows a response to this situation, specifically focused on liquid management processes, the implementation of a Level Automated Monitoring and Control System for non-corrosive containers for domestic and commercial use. The adequate selection of the components that make up this system will allow its easy accessibility, with respect to the cost that this implies, its structure will be designed in such a way that it minimizes the execution time, that integrates more than one control, and that its interface Be as friendly as possible with the operator. This allows it to be an easy-to-use system, greatly improving the response time in its realization, as well as it will allow to have a greater control in the capacity of the level of the containers reducing in this way the expenditure of liquids that can be arouse by some carelessness.

Commercial Control Sera in the Clinical Chemistry Laboratory

1961 ◽  
Vol 7 (2) ◽  
pp. 185-191 ◽  
Author(s):  
Maxwell R Klugerman ◽  
Joseph H Boutwell
Keyword(s):  
Control System ◽  
Clinical Chemistry ◽  
Chemistry Laboratory ◽  
Reference Standard ◽  
Control Serum ◽  
Clinical Chemistry Laboratory ◽  
Precision And Accuracy ◽  
The Individual ◽  
The Cost ◽  
And Control

Abstract 1. The control of precision and accuracy in a clinical chemistry laboratory can be achieved only by knowledgeable and careful use of "concurrent standardization" together with the use of control sera in routine analysis. That is, within each series of analyses, both reference standards and control sera should be included as the only means by which the ultimate in reliability can be achieved. 2. The use of standard curves or calibration factors can be tolerated only when the pure reference standard is difficult to obtain, prepare, or maintain. In such cases, however, the curves or factors should be rechecked frequently and a control serum analyzed concurrently with the unknown. 3. The manufacturer or supplier should refrain from advertising his product as simultaneously a standard and a control. Secondly, he should ascertain the shelf-life of his product under the most rigorous conditions likely to be encountered and indicate this information on the label of the individual bottle or on the container of that lot of control sera. Finally, he should make every effort to reduce the cost of his product in order to make it practical for the clinical chemistry laboratory to establish and maintain an adequate control system.

Study of Low Cost Micro Autopilot for Fixed-Wing UAV

2011 ◽  
Vol 317-319 ◽  
pp. 1672-1676
Author(s):  
Wei Xiong ◽  
Zhao Ying Zhou ◽  
Xiao Yan Liu
Keyword(s):  
Control System ◽  
Flight Control ◽  
Low Cost ◽  
Cost Effective ◽  
System Structure ◽  
Gps Receiver ◽  
Flight Control System ◽  
Sensor Configuration ◽  
The Cost ◽  
And Control

From the cost-effective viewpoint of low cost Bank-to-Turn (BTT) Unmanned Air Vehicles (UAV) and target drone, a low cost flight control system, with the fewest number of sensors, is studied in this paper for the fixed-wing UAV. The structure of the control system is described which is able to estimate necessary information to provide stabilization and guidance for a small fixed wing BTT UAV. The practical flight control system structure and control law for roll hold loop, altitude hold loop, trajectory tracking loop are designed based on the sensor configuration with only a MEMS rate gyro, a MEMS pressure sensor and global positioning system (GPS) receiver only. A prototype low cost autopilot is trial-produced to control a typical UAV. The Experimental results show the effectiveness of navigation and control methods of f the proposed methodology.

Development of a Jacobian Module for Advanced Pulp and Paper Simulation and Control

TAPPI Journal ◽  
2009 ◽  
Vol 8 (1) ◽  
pp. 4-11
Author(s):  
MOHAMED CHBEL ◽  
LUC LAPERRIÈRE
Keyword(s):  
Control System ◽  
Nonlinear Behavior ◽  
Simulation Software ◽  
Pulp And Paper ◽  
Pid Controllers ◽  
Tuning Parameters ◽  
Pid Tuning ◽  
Fixed Set ◽  
And Control ◽  
Operating Points

Pulp and paper processes frequently present nonlinear behavior, which means that process dynam-ics change with the operating points. These nonlinearities can challenge process control. PID controllers are the most popular controllers because they are simple and robust. However, a fixed set of PID tuning parameters is gen-erally not sufficient to optimize control of the process. Problems related to nonlinearities such as sluggish or oscilla-tory response can arise in different operating regions. Gain scheduling is a potential solution. In processes with mul-tiple control objectives, the control strategy must further evaluate loop interactions to decide on the pairing of manipulated and controlled variables that minimize the effect of such interactions and hence, optimize controller’s performance and stability. Using the CADSIM Plus™ commercial simulation software, we developed a Jacobian sim-ulation module that enables automatic bumps on the manipulated variables to calculate process gains at different operating points. These gains can be used in controller tuning. The module also enables the control system designer to evaluate loop interactions in a multivariable control system by calculating the Relative Gain Array (RGA) matrix, of which the Jacobian is an essential part.

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