Design, analysis and test of a DC servomechanism utilizing direct drive
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Authors
Pearson, Martin L.
Tardif, Donald W.
Subjects
Advisors
Date of Issue
1959
Date
Publisher
Monterey, CA; Naval Postgraduate School
Language
en_US
Abstract
The direct drive DC motor as a component part of a servomechanism system utilized in stabilized platform control offers a great deal of promise from the standpoint of system accuracy and performance. The authors have endeavored to develop means of predicting system performance and of improving the response characteristics of this type of control system. From investigations conducted at the Dalmo Victor Company, Belmont, California, and at the United States Naval Postgraduate School, Monterey, California, it is the opinion of the authors that direct drive DC motors used in servo systems provide the servo engineer with two principle advantages over the conventional AC servo motor used in the same application. These are:
1. Backlash elimination caused by gear train assemblies .
2. Servo resonance reduction caused by springy shafts.
The investigation pointed out a glaring weakness in the current state of the art in regard to power amplification. Although well-known for many years, the absence of a suitable DC power amplifier greatly restricts the use of equipment of this type. It is felt that the development of the power transistor will alleviate this problem. The authors feel strongly that when the amplifier problem is solved, the direct drive DC motor will replace the AC motor in many servo applications.
Type
Thesis
Description
Series/Report No
Department
Electrical Engineering