Elevator Brake Release Automatic Control System

2011 ◽  
Vol 130-134 ◽  
pp. 3502-3504
Author(s):  
De Min Zhang ◽  
Xue Hui Liang
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
Power Supply ◽  
Operation Mode ◽  
Control Board ◽  
Rescue Operation ◽  
Floor Level ◽  
Electrical Control ◽  
Operation Control

The brake release electrical control board is a very important element of the elevator rescue operation control system. The brake release board provides a power supply to operate an elevator brake by a battery in rescue operation mode to allow a motion of a car until the next floor level to release any passengers. The brake release board has some buttons to operate the car and some LED’s to indicate the state of running. There are also some parameters in the board to adjust the operation.

EXPERIMENTAL STUDIES ON THE DEVELOPMENT OF AN AUTOMATED SYSTEM FOR REGULATING THE SOIL DENSITY USED IN A SEEDING MACHINE

2021 ◽  
pp. 9-15
Author(s):  
ALEKSEI S. DOROKHOV ◽  
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
Power Supply ◽  
Experimental Studies ◽  
Automated System ◽  
Statistical Characteristics ◽  
Vegetable Crops ◽  
Soil Density ◽  
Density Control

Research on the development of an automatic control system for the rolling-in working units is aimed at establishing the reliability and analytical relationships, determining the quality indicators of work in real conditions of the rolling-in working units of a seeding machine, and checking the patterns obtained in the fi eld and identifi ed theoretically. Research on the development of an automatic control system for the rolling implements was carried out when sowing dragee seeds of table beet of the Bordeaux variety with a seeding unit consisting of a Belarus-4235 tractor and a Monopil S15/12 precision seeding machine. The system for automatic control of soil density includes the main hardware and software: actuators for maintaining and deepening the rolling working units, microcontrollers, motor drivers, a non-contact ultrasonic sensor, a power supply unit and a sensor for measuring soil density. The paper presents the results of a study to determine the soil density when sowing seeds of table beet, depending on the moisture content of the soil in the sowing layer. The authors describe research methodology, provide graphical relationships between changes in soil density and the depth of seeding, and comment on the main obtained statistical characteristics of the experiment. As a result of the study, structural, echnological and functional diagrams of a rolling rink with an automatic control system using electronically controlled electric cylinders (linear actuators) have been developed. The optimal parameters of the linear drive of the press roller have been established: power - 50W, power supply - 12V, rod stroke - 200…600 mm, speed - 10…45 mm/s, load - 200…900 N. Experimental studies have shown the applicability of the presented system of the automatic control of soil density, which ensures the optimum density of the seedbed of 1.3…1.4 g/cm³. The described technique can be used to develop a soil density control system when sowing seeds of other vegetable crops.

Development and experimental investigation of an automatic control system for an excavator

2020 ◽  
pp. 095440622093630
Author(s):  
Guangjun Liu ◽  
Lei Yang ◽  
Di Wu ◽  
Gaoyang Wu ◽  
Hongyuan Chen
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
Operation Mode ◽  
Target Position ◽  
Control Program ◽  
Construction Sites ◽  
Automatic Operation ◽  
Design Requirements ◽  
Construction Efficiency

Excavators are widely used at various construction sites, and they can significantly reduce difficulties during construction and improve construction efficiency. However, conventional excavators still exhibit many shortcomings. In certain construction environments that require precision, the construction accuracy cannot be guaranteed because excavators usually operate in harsh environments. Hence, they can cause potential life hazards to the drivers in certain situations. To address these issues, an excavator automatic control system is developed via retrofitting, modelling, and designing a control program for an excavator. This system can realise three working modes: manual operation, remote control operation, and automatic operation. A test prototype based on the aforementioned concept is developed and relevant experiments are performed. The results under automatic operation mode show that the automatic control system can move the excavator smoothly along the expected trajectory. The fluctuation in the operation velocity is low, and the positioning error to the target position is within 7 cm. Thus, the system can realise the desired control accuracy and satisfy other task design requirements.

Investigation of the stability of periodic motions in a nonlinear automatic control system based on the fast fourier transform

2003 ◽  
Vol 3 ◽  
pp. 297-307
Author(s):  
V.V. Denisov
Keyword(s):  
Fourier Transform ◽  
Control System ◽  
Automatic Control ◽  
Fast Fourier Transform ◽  
Automatic Control System ◽  
Resonance Phenomenon ◽  
Periodic Motions ◽  
Multiply Connected ◽  
Non Linear ◽  
The Stability

An approach to the study of the stability of non-linear multiply connected systems of automatic control by means of a fast Fourier transform and the resonance phenomenon is considered.

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