Direct digital control of a boiler—a myth or a reality?

1973 ◽  
Vol 19 (10) ◽  
pp. 206
Author(s):  
A. Mukherji
Keyword(s):  
Digital Control ◽  
Direct Digital Control

Direct digital control of thyristor amplifiers

1969 ◽  
Vol 116 (5) ◽  
pp. 873 ◽  
Author(s):  
F. Fallside ◽  
R.D. Jackson
Keyword(s):  
Digital Control ◽  
Direct Digital Control

Direct digital control of linear processes subject to random disturbances

AIChE Journal ◽  
1972 ◽  
Vol 18 (4) ◽  
pp. 846-849
Author(s):  
Richard E. Kloubec ◽  
Henry C. Lim
Keyword(s):  
Digital Control ◽  
Linear Processes ◽  
Random Disturbances ◽  
Direct Digital Control

Servomotor Control Using Direct Digital Control And State–Space Technique

2008 ◽  
Vol 49 (1) ◽  
Author(s):  
Mohd Fua’Ad Rahmat ◽  
Mohd Syakirin Ramli
Keyword(s):  
State Space ◽  
Digital Control ◽  
Space Technique ◽  
Direct Digital Control

A general direct digital control algorithm for a class of linear systems

AIChE Journal ◽  
1978 ◽  
Vol 24 (2) ◽  
pp. 360-364 ◽  
Author(s):  
Rajeev Gautam ◽  
Rajakkannu Mutharasan
Keyword(s):  
Linear Systems ◽  
Digital Control ◽  
Control Algorithm ◽  
Direct Digital Control

A New Approach of Direct Digital Control for Spool Valves

1999 ◽  
Author(s):  
J. Ruan ◽  
R. Burton
Keyword(s):  
Digital Control ◽  
Stepper Motor ◽  
Hydraulic Control ◽  
New Approach ◽  
Control Approach ◽  
Speed Of Response ◽  
Spool Valves ◽  
Spool Valve ◽  
Direct Digital Control ◽  
Hydraulic Control System

Abstract In many applications, digital valves driven from stepping motors are often characterized by quantitative errors and in some cases, slow response. A new means of direct digital control is introduced for a spool valve actuated by a stepper motor. With this control strategy, both excellent speed of response and accuracy are simultaneously sustained for the valve. By way of illustration, the characteristics of a digital spool valve are theoretically and experimentally investigated. This paper also deals with the design of the controller and some concepts concerning the digital control of a valve, such as initialization, false protection, etc. An example is given to demonstrate the effectiveness of this digital control approach for a practical electro-hydraulic control system.

DIRECT DIGITAL CONTROL IN THE ELECTRIC DRIVE SYSTEM WITH DISTRIBUTED PARAMETERS

2014 ◽  
pp. 123-131
Author(s):  
Vladimir Tadeushevich Vishnerevsky ◽  
Igor Sergeyevich Stasenko ◽  
Aleksey Anatolyevich Korneyev ◽  
Gennady Sergeyevich Lenevsky
Keyword(s):  
Electric Drive ◽  
Digital Control ◽  
Drive System ◽  
Distributed Parameters ◽  
Electric Drive System ◽  
Direct Digital Control
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