Automatic Tracking System of LEO Satellite Based on SGP4

2021 ◽  
Author(s):  
Kaiyuan Liu ◽  
Jingli Hao ◽  
Junjie Yang ◽  
Yuhuang Ye ◽  
Fuji Yang ◽  
...  
Keyword(s):  
Tracking System ◽  
Automatic Tracking ◽  
Leo Satellite

A Solar Automatic Tracking System Design Based on FPGA

2012 ◽  
Vol 608-609 ◽  
pp. 70-73
Author(s):  
Jun Feng Zhu ◽  
Yue Wen Liu ◽  
Wen Bing Liu
Keyword(s):  
Power Systems ◽  
System Design ◽  
Tracking System ◽  
Energy Utilization ◽  
Solar Panels ◽  
Automatic Tracking ◽  
Precise Control ◽  
Solar Tracking ◽  
Solar Energy Utilization ◽  
Tracking Devices

In order to improve the solar energy utilization, in the respect of technology, we should perfect solar tracking devices, realization of the sunlight is always vertical to the solar panels. This paper is to design a kind of solar automatic tracking system. Design adopts the traditional photoelectric tracking method, with the FPGA as the core, and by using the methods of scheduled monitoring, achieve precise control of stepping motor, thereby promoting the solar panels rotate remains vertical to the sun, which can effectively improve the efficiency of solar power systems.

The Laser Focus Position Control System Based on Motion Controller

2014 ◽  
Vol 644-650 ◽  
pp. 636-638
Author(s):  
Yun Li Zhang
Keyword(s):  
Control System ◽  
Laser Cutting ◽  
Position Control ◽  
Tracking System ◽  
Displacement Sensor ◽  
Focus Position ◽  
Motion Controller ◽  
Automatic Tracking ◽  
Laser Focus

Laser cutting focus position automatic tracking system of control precision directly affects the quality of laser cutting processing. There is a low anti-jamming capability, poor quality,poorer openness and poorer dynamic response short comings in the inductive sensor or the capacitive sensor and constitute of the single chip microcomputer control system. This paper introduces a laser focus automatic tracking system based on motion controller, using optical encoder as displacement sensor, use the motion controller of master-slave tracking (electronic gear) function implementation focus position error compensation quickly. Improve the quality of system control, openness, the stability and reliability.

scholarly journals Airborne Laser Communication System with Automated Tracking

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Xizheng Ke ◽  
Hanli Liang
Keyword(s):  
Pulse Width Modulation ◽  
Tracking System ◽  
Laser Communication ◽  
Communication Link ◽  
Stepping Motor ◽  
Tracking Accuracy ◽  
Automatic Tracking ◽  
Airborne Laser ◽  
Communication Links ◽  
Four Quadrant

The acquisition, alignment, and tracking system is an important part of airborne laser communication and is the prerequisite and guarantee for the normal communication link. In order to solve the problem of automatic tracking of laser communication links in the airborne environment, the rapid capture, alignment, and tracking of beams between terminals are realized. This article proposes a stepping motor as a control servo system and a four-quadrant detector as an automatic tracking method for the detection unit. The pulse width modulation signal controls the rotation speed of the stepping motor and combines the position distribution of the light spot on the four-quadrant detector to achieve high-precision beam tracking. On this basis, indoor simulation experiments are carried out. After many experiments, the tracking accuracy is better than 2.5 μrad, which shows that the system can be applied to airborne laser communication, and it is verified that this method has good automatic tracking performance for airborne laser communication.

scholarly journals AUTOMATIC TRACKING SYSTEM FOR SOLAR CELLS

2000 ◽  
Vol 23 (2) ◽  
pp. 187-193
Author(s):  
Azzam, Attia ElSbaie
Keyword(s):  
Solar Cells ◽  
Tracking System ◽  
Automatic Tracking

A Hybrid PSO-PI Controller for the LEO Satellite Tracking System

2014 ◽  
Vol 912-914 ◽  
pp. 1069-1072
Author(s):  
Te Jen Su ◽  
Jui Chuan Cheng ◽  
Ming Yuan Huang ◽  
Xun Xain Zhan
Keyword(s):  
Tracking System ◽  
Pso Algorithm ◽  
Satellite Tracking ◽  
Pi Controller ◽  
Feedback Mechanism ◽  
Low Earth Orbit ◽  
Search Process ◽  
Routing Mechanism ◽  
Leo Satellite ◽  
Angle Indicator

This paper presents a smart-routing mechanism of a control system to track Low Earth Orbit (LEO) satellites. Satellite tracking mainly relies on the antenna pointing database generated by SGP4 orbit forecasting model and follow the point coordinates to command the rotation of the axes. Gears rotation gaps will affect the strength of the received signal; the Proportional Integral (PI) controller is used to adjust the error values caused by the drive shaft mechanism. Particle swarm optimization (PSO) algorithm has fewer parameter settings and the advantages of fast convergence, which is adopted for variable selection and optimization for the parameters kp and ki of PI controller. The resolver feedback mechanism of actual angle indicator is using as a basis for performance adjustment in the search process. The experimental results of a three axes tracking system demonstrate the reliability and better performance of the proposed PSO-PI satellite tracking system.

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