Research on Operation and Lifting Path of Closed-Loop Full-Objective Management and Control System in Coal Mine

2019 ◽  
Vol 08 (12) ◽  
pp. 2045-2049
Author(s):  
计先 杨
Keyword(s):  
Control System ◽  
Coal Mine ◽  
Closed Loop ◽  
And Control ◽  
Objective Management

scholarly journals New integrated monitoring and control system for disaster gas application in coal mine

2017 ◽  
Vol 191 ◽  
pp. 012051
Author(s):  
Deng-yu Zhao ◽  
Xing-ping Lai ◽  
Chang-fa Ji ◽  
Hong-jun Xi ◽  
Zhang Bo ◽  
...  
Keyword(s):  
Control System ◽  
Coal Mine ◽  
Monitoring And Control ◽  
Integrated Monitoring ◽  
Monitoring And Control System ◽  
And Control

High Speed Weld Control System of Dual-Bypass MIG Based on LabVIEW

2010 ◽  
Vol 139-141 ◽  
pp. 1852-1855
Author(s):  
Cheng Xue ◽  
Yu Shi ◽  
Ding Fan ◽  
Hao Zhong ◽  
Ming Xiao Shi
Keyword(s):  
Control System ◽  
High Speed ◽  
Closed Loop ◽  
Closed Loop Control ◽  
Mig Welding ◽  
Loop Control ◽  
Weld Formation ◽  
And Control ◽  
Control Output ◽  
Test Result

Dual-bypass MIG welding (DB-GMAW) is a new kind of high speed MIG welding with three arcs. In order to monitor the weld process and control it, a high speed weld system of DB-GMAW was built. The system was run by LabVIEW programs, including getting data of system and control output signals. The test result of system showed that all equipments could be used in the same time. Beside images of weld pool and arc, the weld voltages and currents of every part had been acquired. The signals of bypass current and weld speed also had been input TIG welding sources and worktable motor successfully. Meanwhile, the high speed weld formation had a good quality, and all of these established the closed-loop control of high speed DB-GMAW.

scholarly journals Operation of the auditory feedback monitoring loop in children with articulatory defects

1971 ◽  
Vol 18 (1) ◽  
Author(s):  
Sandra Ossip
Keyword(s):  
Control System ◽  
Motor Activity ◽  
Auditory Feedback ◽  
Closed Loop ◽  
Strong Relationship ◽  
Preliminary Evaluation ◽  
Closed Loop System ◽  
Feedback Monitoring ◽  
And Control ◽  
Normal Speech

This study constitutes a preliminary evaluation of the utilization of auditory feedback for the acquisition of normal speech in normal speaking children and children having functional articulatory errors. The degree to which this is utilized for the organization and control of motor activity was inferred by delaying auditory feedback in time and quantitating the resulting disturbances in the speech behaviour. Evidence was found to support the following hypotheses: I. There is a breakdown of speech under DAF. 2: Children with multiple articulatory disorders exhibit less severe breakdown effects under DAF than their normal peers. 3. There appears to be a strong relationship between increasing age and articulatory ability. 4. There tends to be a relationship between increasing age and the breakdown of speech under DAF. 5. Monitoring of speech is a highly skilled control system which tends to develop with age and experience, and is not operating as strongly in the child with articulation-defects. From the results of the study, it seems that the auditory feedback monitoring loop for speech is not operating as successfully in the child with multiple articulatory errors as it operates in the normal child, and that the development of a closed loop system appears to be retarded in some way.

Kinematics, Dynamics, and Control of Tendon-Driven Mechanisms Using Signal Flow Graphs

1998 ◽  
Author(s):  
Meng-Sang Chew ◽  
Theeraphong Wongratanaphisan
Keyword(s):  
Control System ◽  
Transfer Function ◽  
Closed Loop ◽  
Transfer Functions ◽  
Signal Flow ◽  
Signal Flow Graphs ◽  
Loop Transfer Function ◽  
Dynamics And Control ◽  
Flow Graphs ◽  
And Control

Abstract This paper presents the analysis of the kinematics, dynamics and controls of tendon-driven mechanism under the framework of signal flow graphs. For decades, the signal flow graphs have been applied in many areas, particularly in controls, for determining the closed-loop transfer function of a control system. The tendon-driven mechanism considered here consists of several subsystems including actuator-controller dynamics, mechanism kinematics and mechanism dynamics. Each subsystem will be derived and represented by signal flow graphs. The representation of the whole system can be carried out by connecting the graphs of subsystems at the corresponding nodes. Transfer functions can then be obtained by using Mason’s rules. A 3-DOF robot finger utilizing tendon-driven mechanism is used as an illustrative example.

Simultaneous Structural and Control Design Using Constraint Functions

1988 ◽  
Vol 110 (1) ◽  
pp. 65-72 ◽  
Author(s):  
J. M. Starkey ◽  
P. M. Kelecy
Keyword(s):  
Control System ◽  
System Dynamics ◽  
Structural Design ◽  
Closed Loop ◽  
Control Design ◽  
Pole Placement ◽  
Design Parameters ◽  
Weighted Sum ◽  
Design Technique ◽  
And Control

A design technique is presented which modifies system dynamics by simultaneously considering control system gains and structural design parameters. Constraint functions are devised that become smaller as (1) structural design parameters and feedback gains become smaller, and (2) closed-loop eigenvalues migrate toward more desirable regions. By minimizing a weighted sum of these functions, the interaction between design performance and design parameters can be explored. Examples are given that show the effects of the weighting parameters, and the potential advantages of this technique over traditional pole placement techniques.

Kinematic Analysis of Tendon Driven Mechanisms Using Signal Flow Graphs

1995 ◽  
Author(s):  
M. Chew ◽  
J. Escobedo-Torres ◽  
R. Huerta-Ochoa
Keyword(s):  
Control System ◽  
Kinematic Analysis ◽  
Closed Loop ◽  
Direct Solution ◽  
Loop Function ◽  
Signal Flow ◽  
Signal Flow Graphs ◽  
The Many ◽  
Flow Graphs ◽  
And Control

Abstract The application of signal flow graphs has been applied to the kinematic analysis of tendon driven mechanisms. Signal flow graphs have been used in the many areas particularly in the area of control for determining the closed-loop function of a control system. An application of this approach brings the kinematic analysis of tendon driven mechanisms a step towards dynamic analysis and control of these same mechanisms, all within the same framework. Rules directly relating to the application of this technique to tendon driven mechanisms have been developed along with a stepwise description of the construction of signal flow graphs. The resulting graphs permit a direct solution to the kinematic relationships between the output and the input to the mechanism.

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