scholarly journals Independent PRF Generation and Control for Frequency Phase Calibration on Mono-pulse Radar at a Remote Location

2021 ◽  
Vol 24 (4) ◽  
pp. 368-373
Author(s):  
Jaewon Yang ◽  
Seungoh Yoo ◽  
Jaehyuk Yoon ◽  
Dongju Lee
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Pulse Repetition Frequency ◽  
Average Frequency ◽  
Precision Control ◽  
Remote Location ◽  
Pulse Radar ◽  
Phase Calibration ◽  
And Control ◽  
Frequency Phase

This paper presents a method of independent pulse repetition frequency(PRF) generation and control for frequency phase calibration on mono-pulse radar at a remote location. In order to generate an independent PRF signal of 320[Hz], pulse width modulation(PWM) of 16-bit timer/counter was applied. For a precision control of PRF signal, 16-bit timer/counter interrupt was changed for each period. Therefore, average frequency of PRF could be controlled by 0.0001[Hz]. To calibrate a frequency phase of mono-pulse radar at a remote location, the proposed PRF generator with a precision control of frequency was used regardless of receiving PRF signal from a radar. For the verification of the proposed PRF generator, theoretical analysis and experimental results are included.

scholarly journals DIGITAL AND PULSE-WIDTH CONTROL OF A SPACE ROBOT WHEN APPROACHING A GEOSTATIONARY SATELLITE

2020 ◽  
Vol 22 (5) ◽  
pp. 74-78
Author(s):  
Ye.I. Somov ◽  
◽  
S.A. Butyrin ◽  
S.Ye. Somov ◽  
◽  
...  
Keyword(s):  
Pulse Width ◽  
Electric Propulsion ◽  
Pulse Width Modulation ◽  
Geostationary Satellite ◽  
Space Robot ◽  
Control Algorithms ◽  
Control Problems ◽  
Guidance And Control ◽  
Gyroscopic Moment ◽  
And Control

The control problems on a space robot during its approach to an information geostationary satellite are considered. The robot motion control system uses an electric propulsion system with 8 engines at the pulse-width modulation of their thrust values and a gyroscopic moment cluster based on 4 gyrodines with digital control. Numerical results are presented that demonstrate the effectiveness of the developed discrete guidance and control algorithms.

scholarly journals Advanced Fan Controller Using Atmega 1284P

2018 ◽  
Vol 18 (2) ◽  
pp. 43-47
Author(s):  
F.G. Apostol ◽  
G. Predusca
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Source Code ◽  
Manual Control ◽  
The Internet ◽  
Operating Parameters ◽  
Monitoring And Control ◽  
Mode Of Operation ◽  
Maximum Temperatures ◽  
And Control

AbstractThe project aims at creating a monitoring and control circuit in a desktop or complex system with the possibility to set the operating parameters. The project allows automatic and manual control of a certain number of fans using Pulse Width Modulation (PWM) control by the user or automatically by the system monitoring thresholds of minimum and average temperatures (also set by the user within the code). The system was designed with the following options: audible and visual alert when reaching maximum temperatures; time display, PWM percentage and three temperatures shown on a 16x2 LCD; the system-acquired data is then transmitted to a website. Additional features include the possibility of setting a color inside the system, also used as an alert as well as a color adjustment function by sound (for a musical lightshow). The mode of operation is based on the source code written in the Arduino IDE 1.6.3 software with the help of free libraries and free codes provided on the internet.

Principle and control strategy of pulse width modulation rectifier for hydraulic power generation system

2019 ◽  
Vol 135 ◽  
pp. 1200-1206 ◽  
Author(s):  
Kunlin Wang ◽  
Songwei Sheng ◽  
Yaqun Zhang ◽  
Yin Ye ◽  
Jiaqiang Jiang ◽  
...  
Keyword(s):  
Power Generation ◽  
Control Strategy ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Generation System ◽  
Hydraulic Power ◽  
Power Generation System ◽  
And Control

scholarly journals PLC Based DC Motor Speed Monitoring and Controlling System

2021 ◽  
pp. 616-624
Author(s):  
Shraddha Nagare ◽  
Snehal Padwal ◽  
Shweta Thakare ◽  
Prof. K. T. Ugale
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Speed Control ◽  
Dc Motor ◽  
Motor Speed ◽  
Motor Circuit ◽  
Controlling System ◽  
And Control ◽  
Off Time

PLC using rensans microcontroller for speed control of DC Gear Motor. in this project we will use rensans PLC for controlling the speed of operation of DC gear motor DC gear motor we can control with the help of pwm technique pulse width modulation. in this modulation we will very the weed width and control the DC gear motor speed. we will give 12 volt supply to DC motor and for controlling the speed we will put one circuit with the help of transistor between Rensans PLC and DC gear motor circuit used for pwm purpose the microcontroller give the pulses through transistor to the DC motor depending upon the pulses speed will vary in this pulses we will vary the on time and off time of the DC speed water if the on time is larger than the of time the speed of motor is increases and if the of time is larger than of time then speed will decreases this is a pwm technique pulse width modulation we will use in the project.

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