scholarly journals Data Acquisition and Processing in the NGTE Altitude Test Facility

1975 ◽  
Author(s):  
G. W. Dean ◽  
S. W. White
Keyword(s):  
Data Acquisition ◽  
Current System ◽  
Test Facility ◽  
Engine Test ◽  
Performance Curve ◽  
Turbofan Engine ◽  
Uncertainty In Measurement ◽  
On Line ◽  
Computer Controlled ◽  
Data Acquisition And Processing

The Engine Test Facility of the National Gas Turbine Establishment has used computer-controlled instrumentation systems for on-line data acquisition and processing for over 15 yr. The development of the system is outlined and the current system described. To illustrate its present use typical results obtained during tests on a large turbofan engine are presented and discussed. The emphasis of this paper is on the use of the system to assess the accuracy and reliability of the test measurements before commencing qualification tests on the engine. The probable sources of error are described and placed into three categories, to assist handling and propagation through the calculation processes. The resultant uncertainty in measurement of Thrust and sfc at cruise (M = 0.85, 35,000 ft), is estimated to be 0.50 percent (one standard deviation) for a single performance curve.

A Low Cost Computer Controlled IC Engine Test Facility

1998 ◽  
Vol 31 (4) ◽  
pp. 105-109
Author(s):  
Z. Ren ◽  
T. Campbell ◽  
J. B. Yang
Keyword(s):  
Low Cost ◽  
Test Facility ◽  
Engine Test ◽  
Ic Engine ◽  
Computer Controlled

Design and Implementation of a Digital Multimode H∞ Controller for the Spey Turbofan Engine

2009 ◽  
Vol 132 (1) ◽  
Author(s):  
Raza Samar ◽  
Ian Postlethwaite
Keyword(s):  
Degrees Of Freedom ◽  
Structural Integrity ◽  
Controller Design ◽  
Reference Model ◽  
Test Facility ◽  
Engine Test ◽  
Control Logic ◽  
Turbofan Engine ◽  
Simple Strategy ◽  
Bumpless Transfer

In this paper, a 2 degrees-of-freedom multimode controller design for the Rolls Royce Spey turbofan engine is presented. The controller is designed via discrete time H∞-optimization; it provides robust stability against coprime factor uncertainty, and a degree of robust performance in the sense of making the closed-loop system match a prespecified reference model. Multimode control logic is developed to preserve structural integrity of the engine by limiting engine variables to specified safe values. A simple strategy for antiwindup and bumpless transfer between controllers, based on the Hanus anti-windup scheme (1987, “Conditioning Technique, A General Anti-Windup and Bumpless Transfer Method,” Automatica, 23(6), pp. 729–739) and the observer-based structure of the controller, is presented. The structure of the overall switched controller is described. Actual engine test results using the Spey engine test facility at Pyestock are presented. The controller is shown to perform a variety of tasks, its multimode operation is illustrated and improvements offered on existing engine control systems are discussed.

Data acquisition and processing for automated electron microscopy

1993 ◽  
Vol 51 ◽  
pp. 546-547 ◽  
Author(s):  
O.L. Krivanek ◽  
W.J. de Ruijter ◽  
C.E. Meyer ◽  
M.L. Leber ◽  
J. Wilbrink
Keyword(s):  
Electron Microscopy ◽  
Data Acquisition ◽  
Quality Data ◽  
High Quality Data ◽  
Computing Power ◽  
Essential Components ◽  
Different Types ◽  
Processing Abilities ◽  
On Line ◽  
Data Acquisition And Processing

Automated electron microscopy promises to perform many tasks better and faster than a human operator. It should also allow the operator to concentrate on the larger picture without having to worry about countless details that can be best handled by a computer. It requires three essential components: 1) data acquisition system that provides the computer with high-quality data on line, 2) computer and software able to analyze the incoming data in real time, and 3) control links that enable the computer to adjust the important microscope parameters.An optimized system architecture is shown schematically in Fig. 1. The microscope is equipped with various microprocessors that control its hardware, and provide data processing abilities devoted to different types of signals (e.g., X-ray spectra). These microprocessors use a standardized communication protocol to communicate over a standard network (such as AppleTalk or Ethernet) with a “master computer”, which provides the user interface, as well as the computing power necessary to handle the most demanding tasks.

Design of the High Speed Data Acquisition and Processing System Based on DSP

2013 ◽  
Vol 380-384 ◽  
pp. 3667-3671
Author(s):  
Peng Zhao ◽  
Zeng Sheng Li
Keyword(s):  
Data Acquisition ◽  
High Speed ◽  
Information Science ◽  
Processing System ◽  
Pull Out ◽  
High Speed Data Acquisition ◽  
On Line ◽  
High Speed Data ◽  
Band Pass ◽  
Data Acquisition And Processing

Data acquisition is the basic means of access to information; it is an important pillar of the information science, a comprehensive application technology associated with the sensor, signal measuring and processing, computer technology as the foundation. USB has the characteristics of easy to use, high speed and supporting to cut in or pull out on-line, it becomes a trend in data acquisition technology. To introduce the hardware and software design, selecting DSP for microprocessor control chip and Philip Corporations ISP1582 for USB receiver/transfer control chip. In this paper, the segmented band-pass filtering is adopted to filter the collected data, the problems in system debugging are analyzed and summarized, and the measures for improvement are finally put forward. Thus, combining USB and DSP is an effective solution to data acquisition with high speed as well as processing and transmitting.

On-Line Data Acquisition and Processing System for the HTGR

1973 ◽  
Vol 20 (1) ◽  
pp. 717-723 ◽  
Author(s):  
S. J. Nowicki ◽  
D. G. Hubbard ◽  
R. T. Jones
Keyword(s):  
Data Acquisition ◽  
Processing System ◽  
On Line ◽  
Data Acquisition And Processing

Package for on-line data acquisition and processing with microcomputers

1984 ◽  
Vol 3 (8) ◽  
pp. 191-193 ◽  
Author(s):  
D.N. Rutledge ◽  
J.-L. Excoffier ◽  
C.J. Ducauze
Keyword(s):  
Data Acquisition ◽  
On Line ◽  
Data Acquisition And Processing
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