CONTROL SERVO SYSTEM-GMRT
BY.......
133248,
SHRIJEEB GHOSH,THIRD YEAR,
ELECTRONICS AND TELECOMMUNICATIONS,INSTITUTE OF TECHNOLOGY(ULHASNAGAR)
Index:i. Types of antennasii. Introductioniii. Contextiv. Nested control loopsv. Alt-Azimuth Positioning Control Systemvi. Control Servo System Block Diagramsvii. Observationsviii. Advantages and advancements
CONTROL SERVO SYSTEM-GMRT
TYPES OF ANTENNA
S
TURNABLE ANTENNA
S
FIXED
ANTENNAS
INTRODUCTION:
Giant
Metrewave
Radio
telescope
World’s largest radio telescope at metrewaves
Designed and fabricated in India
Over One of the 30 nos. of 45m diameter Dish Antenna of the GMRT Microwaves Antennas for Radio Astronomy Applications
INTRODUCTION:
Important to be controlled by a precession control system to point to the radio source
The GMRT servo system has designed with three Nested control loops
Heavy in weight Antenna alt-azimuth Positioning Control System
CONTEXT:
General process of nested control loops
nested control loops in antennas
Moves the dish in a plane parallel to earth surface
Also moves the dish in a plane perpendicular to earth surface
2 motor drive per axis, for backlash elimination
alt-azimuth Positioning Control System
Dismantled layout
Schematic of Alt-Azimuth control system
simplified diagram of alt-azimuth control system
PRINCIPLE OF POSITION CONTROL SYSTEM
GMRT SERVO CONTROL BLOCK DIAGRAM
observation:
CONTROL SERVO SYSTEM-GMRT
Conclusion:Observe and study the control
servo system used for turnable antennas
Study a special type of motor(A-Z motor)
Highlight the Limitations of alt-azimuth servo system
Limit power consumption of motors
CONTROL SERVO SYSTEM-GMRT
advancements:
Economical(once installed, the position is adjusted using such system)
Provides high accuracy to space researchers
advantages:
THANK YOU….Queries….
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