Study on a Pneumatic Automatic-Extendable Crash Energy Absorption System

2012 ◽  
Vol 455-456 ◽  
pp. 1509-1514
Author(s):  
Li Bo Cao ◽  
Hong Bao Wang ◽  
Jun Wu ◽  
Hui Qin Chen
Keyword(s):  
Control System ◽  
Energy Absorption ◽  
Thin Shell ◽  
Absorption System ◽  
And Control ◽  
Shell Energy ◽  
Pneumatic Equipment

This paper presents a pneumatic energy absorption system which can extend the energy-absorption beam automatically just before crash. The system consists of thin-shell energy absorption structure, pneumatic equipment and control system. When the control system detectives a crash accident is unavoidable, the pneumatic equipment will extend the energy absorption beam which is fixed in thin-shell energy absorption structure immediately to increase energy absorption space. This system has been equipped on a mass produced bus, and it indicates that the length of energy absorption space can be increased more than 230 mm instantaneously before a crash accident occurs. The time used to extend the energy absorption beam is less than 100ms.

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.

Еlectric Drive and Control System of Flying saw of electricweld item

2015 ◽  
Vol 19 (95) ◽  
pp. 50-53
Author(s):  
Aleksej A. Kravcov ◽  
◽  
Leonid G. Limonov ◽  
Valerij V. Sinelnikov ◽  
Stanislav V. Potapov
Keyword(s):  
Control System ◽  
Drive And Control ◽  
And Control

Analysis of the Management and Control System of Trade Receivables on the Effectiveness of the Corporate Cash Flow on PT. Enseval Putera Megatrading, tbk

2020 ◽  
Vol 2 (1) ◽  
pp. 75-87
Author(s):  
Syarifah Nuriah ◽  
Abdul Rakhman Laba ◽  
Muhammad Sobarsyah
Keyword(s):  
Control System ◽  
Cash Flow ◽  
Primary Data ◽  
Ratio Analysis ◽  
Financial Ratio ◽  
Accounts Receivable ◽  
Corporate Capital ◽  
Financial Ratio Analysis ◽  
Data Source ◽  
And Control

This study aims to determine the management and control system of trade receivables on the effectiveness of the cash flow company’s at PT. Enseval Putera Megatrading, Tbk. The data source used in this study is the primary data source, obtained directly from the company. The analytical method used for testing the management and control system of receivables on the effectiveness of cash flow is the analysis of financial ratios. In this study, the data used for analysis are qualitative data analysis and financial ratio analysis, namely the activity ratio (RTO, ACP, Arrears Ratio, and Billing Ratio). The results showed that (1) RTO of PT. Enseval Putera Megatrading, the highest rate in 2017 was 189 times, while the lowest RTO was in 2015 which was 115 times. This shows the normal level of turnover. The faster the payment terms, the better for the company, because the faster the working capital embedded in receivables returns to capital or cash, which means the higher the receivables turnover. (2) ACP or the average age of collection of receivables applied by companies, especially the value in 2017 is 2 days. This means that the company has been effective in managing its accounts receivable because the standard for collecting receivables set by the company is the repayment limit or due date no later than 7 (seven) to 90 (Ninety) calendar days from the billing statement received by the service user. (3) The Arrears Ratio, namely from 2014-2018, the largest was only 1.11%. This shows that the lower the arrears ratio, the better for the company, which means the company is able to handle its receivables properly. (4) Billing Ratio shows that from 2014-2018 the lowest that is 98.88% shows the greater the value of collectible receivables means the greater the percentage value of the collection ratio so that the better for the company because of the greater return on corporate capital. Then it can be concluded that the Billing Ratio of PT. Enseval Putera Megatrading, it's not working effectively.

Performance analyses of the communication networks of a modern supervision and control system of research reactors

Kerntechnik ◽  
2009 ◽  
Vol 74 (1-2) ◽  
pp. 42-46
Author(s):  
E. I. El-Madbouly ◽  
M. K. Shaat ◽  
A. M. Shokr ◽  
G. H. Elrefaei
Keyword(s):  
Control System ◽  
Communication Networks ◽  
Research Reactors ◽  
Performance Analyses ◽  
And Control
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