scholarly journals SIMULATION DESIGN OF AUTOMATIC CONTROL SYSTEM OF VARIABLE AIR VOLUME AIR CONDITIONING UNDER SIMPLE AIR VOLUME CONTROL ALGORITHM

2020 ◽  
Vol i (8) ◽  
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
Air Conditioning ◽  
Control Algorithm ◽  
Volume Control ◽  
Simulation Design ◽  
Variable Air Volume ◽  
Air Volume

Study of Constant Airflow Rate and Constant Room Pressure Control Systems for Physical Containment Laboratories

1988 ◽  
Vol 31 (1) ◽  
pp. 56-61
Author(s):  
Atsushi Takahashi ◽  
Takao Okada
Keyword(s):  
Control System ◽  
Control Systems ◽  
Static Pressure ◽  
Pressure Control ◽  
Volume Control ◽  
Airflow Rate ◽  
Processing Unit ◽  
Variable Air Volume ◽  
Central Processing ◽  
Air Volume

This study discusses various control systems that can keep the room pressure and supply/exhaust airflow rate at constant levels in "other rooms" of a highly airtight containment facility when the supply/exhaust airflow is shut off in one of the rooms for decontamination purposes. This study has shown that the constant air volume control system (CAV) allows hysteresis to occur at small differentials on the performance curve of the static pressure differentials and that this hysteresis can cause wide fluctuations in room pressure. In contrast, the variable air volume, central processing unit (VAV-CPU) control system can maintain both airflow rates and room pressures. Each room pressure was controllable to the set level, with an error of less than ±0.5 mmH2O even during transient distur bances. This control system limited fluctuations in the airflow to and from each room to 5 percent during the transient responses. This control system also allows power savings in the operation of supply/exhaust fans, because of the reduced airflow rate and the static pressure of the fans, and is considered to be an excellent control system.

Digital Automatic Control System with PID Controller

1970 ◽  
Vol 110 (4) ◽  
pp. 13-16
Author(s):  
A. Petrovas ◽  
S. Lisauskas ◽  
R. Rinkeviciene
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Design Process ◽  
Automatic Control System ◽  
Pid Control ◽  
Pid Controller ◽  
Control Algorithm ◽  
General Purpose ◽  
Simulation Results

The design process of digital automatic control system with PID controller is considered. The solution of problems related with implementation of PID control algorithm into general purpose 8-bit microcontroller is discussed. Simulation results demonstrating performance of system are presented. Ill. 4, bibl. 6, tabl. 3 (in English; abstracts in English and Lithuanian).http://dx.doi.org/10.5755/j01.eee.110.4.277

scholarly journals KOMPARASI MODEL JIGSAW DENGAN TWO STAY TWO STRAY TERHADAP HASIL BELAJAR

2020 ◽  
Vol 7 (4) ◽  
pp. 59
Author(s):  
Muhammad Doni ◽  
Hanesman Hanesman
Keyword(s):  
Control System ◽  
Cooperative Learning ◽  
Automatic Control ◽  
Learning Outcomes ◽  
Automatic Control System ◽  
Air Conditioning ◽  
Learning Model ◽  
Test Results ◽  
Average Value ◽  
System Expertise

This study aims to determine the differences in the Jigsaw type cooperative learning model with the Two Stay Two Stray type on the learning outcomes of the XI Grade Automatic Control System Expertise in the Engineering and Air Conditioning Technique Program at SMK Negeri 3 Pariaman. This type of research is an experiment in the form of Time Series Design that is used in class XI TPTU A with two learning models namely, Jigsaw model and Two Stay Two Stray model. The results showed the average value of the Jigsaw model was 81.67 and the average value of the Two Stay Two Stray model was 76.46. Obtained t test results with significance 0.05 which obtained tcount> t table (3,568> 2,013) which means that Ho is rejected and Ha is accepted. Then it can be concluded that there is a difference between the Jigsaw type cooperative learning model with the Two Stay Two Stray type on the learning outcomes of the XI Grade Automatic Control System Expertise in the Engineering and Air Conditioning Technique Program at SMK Negeri 3 Pariaman. Keywords: Comparison, Jigsaw, Two Stay Two Stray, Learning Outcomes

scholarly journals Automatic Taxiing Direction Control System for Carrier-Based Aircraft

2019 ◽  
Vol 8 (2) ◽  
pp. 171-179
Author(s):  
Mariusz Krawczyk ◽  
Cezary Szczepański ◽  
Albert Zajdel
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
Control Algorithm ◽  
Proper Method ◽  
Direction Control

This paper solves the problem of automatic taxiing direction control of carrier-based aircraft. On modern aircraft carriers, taxiing aircraft either propel themselves using their own engines or are towed by specialised tugs, which requires dedicated personnel and assets. The automatization of this process would simultaneously increase aircraft flow and decrease the number of personnel and assets required. The key challenge in the automatization of this type of process is the development of an automatic control system capable of performing the requisite tasks, which our researchers managed to do. First, the specific conditions of taxiing on-board carriers were analysed and modelled. The model of a fixed-wing aircraft best suited to this purpose was identified and the proper method of automatic control – ADRC – chosen. The algorithm used in the methodto facilitate effective direction control of a taxiing aircraft was formulated and extensively tested. The results of automatic taxiing simulation for F/A-18 aircraft have been presented. The conclusion is that the ADRC type control algorithm can ensure effective automatic control of taxiing aircraft.

scholarly journals Research of Variable Application Control System Based on Fuzzy Control

2018 ◽  
Vol 38 ◽  
pp. 01013
Author(s):  
JinXia Huang ◽  
Yu Zhang ◽  
XiaoGuang Su ◽  
SiQing Tian
Keyword(s):  
Control System ◽  
Fuzzy Control ◽  
Automatic Control ◽  
Automatic Control System ◽  
Pesticide Residues ◽  
Control Algorithm ◽  
Unit Area ◽  
Pesticide Application ◽  
Simulation Results ◽  
Fuzzy Control Algorithm

The AT89C52 microcontroller and the fuzzy control algorithm is used to design the automatic control system of variable Spraying pesticides. The system adjusts automatically the electric regulating valve according to given Spraying pesticides per unit area so that the actual amount of Spraying pesticides equal to the set value. The simulation model of automatic control system of variable pesticide application was established, and the controller was simulated by MATLAB / SIMULINK software fuzzy control toolbox. The simulation results show that the structure and algorithm of the proposed automatic control system of pesticide application is feasible, The system improves greatly pesticide utilization, reduce pesticide residues and environmental pollution.

Research on Closed-Loop Control Algorithm of Pneumatic Clutch Based on Optimizing Engaged - Schedule

2014 ◽  
Vol 509 ◽  
pp. 213-217
Author(s):  
Xing Zhong Li ◽  
Yu Long Lei ◽  
Shao Hua Sun
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
Control Algorithm ◽  
Simulation Analysis ◽  
Test Scheme ◽  
Loop Control ◽  
Stand Test ◽  
Clutch Engagement

According to the automatic control system of pneumatic AMT clutch, this paper proposes a novel PID control based on logical switch of clutch engagement index. The PWM control is used to make a control for the solenoid valve. And a controller is established by this control algorithm. The automatic control system of pneumatic AMT clutches modeling using the AMEsim software, related simulation analysis and modifying the control parameters of the controller. It is conducted stand test according to the test scheme for the clutch automatic control system. And the test data is record and made an analysis on. The control algorithm is verified by stand test, greatly improving the bonding quality of the clutch.

Research on the Temperature Control Algorithm of VAV Air Conditioning System

2013 ◽  
Vol 401-403 ◽  
pp. 1247-1250 ◽  
Author(s):  
Jin Zhou Yan ◽  
Nian Ping Jiang
Keyword(s):  
Neural Network ◽  
Air Conditioning ◽  
Control Algorithm ◽  
Rbf Neural Network ◽  
Wavelet Neural Network ◽  
Full Agreement ◽  
Air Conditioning System ◽  
Variable Air Volume ◽  
System Parameters ◽  
Air Volume

This paper has proposed a new control algorithm based on wavelet neural network to control the Variable air volume Air Conditioning System with features of nonlinear and large lag. Using the wavelet neural network to predict the output variables online, and using the fuzzy RBF neural network as the controller to robust control the uncertainties of system parameters. Simulation results show that the algorithm proposed has good local predict ability for the nonlinear system, which is in full agreement with the mode. And it shows strong robustness and adaptability using the fuzzy RBF neural network to control the model gap in the running process of system.

ANALYTICAL FEASIBILITY STUDY OF THE AUTOMATIC CONTROL SYSTEM OF TILLAGE DEPTH

2021 ◽  
pp. 19-23
Author(s):  
ALEKSEI S. DOROKHOV ◽  
◽  
ALEKSEI V. SIBIRYOV ◽  
ALEKSANDR G. AKSENOV ◽  
MAKSIM A. MOSYAKOV ◽  
...  
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
Control Algorithm ◽  
Control Object ◽  
Soil Cultivation ◽  
Design Scheme ◽  
Basic Set ◽  
Tillage Depth ◽  
Positional Control

The authors have carried out analytical studies on the development and rationalization of a system for automatic controlling the depth of tillage, a block diagram and an algorithm for a linear positional control system, as well as off ered a design scheme to develop a control algorithm. A mathematical model describing the control object that regulates the tillage depth has been determined, provided that the motion trajectory of the moving parts of the driving links and the actuator rods of the automatic system controlling the tillage depth is perfectly traced. A structural diagram of a linear system of positional control of the soil tillage depth has been developed, which is a mechanism for adjusting the support wheel with an acting disturbance on the control object, changing the distance between the O axis of the wheel rotation of the tillage machine power tool and the rotation axis of the support wheels of a soil cultivation machine. A design scheme to develop a control algorithm for changing the tillage depth has been obtained. To determine the required accuracy and modes of using hardware in various phase states of the soil layer, a basic set of hardware was identifi ed and analyzed to ensure that it meets the requirements for controlling the tillage depth of the working elements. They include a sensor for determining the penetration depth of the working element; microcontroller (setting and control of regulated force impact on the soil, i.e. vertical movement of the electric cylinder rod); electric cylinders (linear actuators). To test the developed algorithms for the functioning of the automatic control system for adjusting the travel depth of the working elements for presowing soil cultivation, it is necessary to conduct experimental studies in laboratory and production conditions.

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