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Investigation into soft-start techniques for driving servos.

Authors :
Ross, Robert
Source :
Mechatronics. Mar2014, Vol. 24 Issue 2, p79-86. 8p.
Publication Year :
2014

Abstract

Abstract: Servos (as commonly used in radio controlled vehicles and small scale robotics) are DC actuators which use a potentiometer to provide built-in feedback to localise an actuator arm. To minimise jerky control movements, many servo controllers include velocity and acceleration control which operate using a defined velocity profile resulting in the Pulse Width Modulation (PWM) control value being changed over time. On power-up the initial position of the servo arm is unknown to external controller—resulting in the arm moving to the starting value at maximum speed (which may be mechanically hazardous). In this paper two different techniques for performing a soft-start for servos are described and evaluated, namely: voltage profiling and intermittent drive. The different techniques are implemented and evaluated using four different servos based on measured velocity profiles, current consumption, and peak torque. [Copyright &y& Elsevier]

Details

Language :
English
ISSN :
09574158
Volume :
24
Issue :
2
Database :
Academic Search Index
Journal :
Mechatronics
Publication Type :
Academic Journal
Accession number :
94788392
Full Text :
https://doi.org/10.1016/j.mechatronics.2013.11.014