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

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.

Development status of the NAL Ramjet Engine Test Facility and sub-scale scramjet engine

1992 ◽  
Author(s):  
HIROSHI MIYAJIMA ◽  
NOBUO CHINZEI ◽  
TOHRU MITANI ◽  
YOSHIO WAKAMATSU ◽  
MASATAKA MAITA
Keyword(s):  
Test Facility ◽  
Engine Test ◽  
Development Status ◽  
Ramjet Engine ◽  
Scramjet Engine

Comparison and Synthesis of Performance and Aerodynamic Modeling of a Pass-Off Turbofan Engine Test Cell

2015 ◽  
Author(s):  
Martin Marx ◽  
Michael Kotulla ◽  
André Kando ◽  
Stephan Staudacher
Keyword(s):  
Research Effort ◽  
Engine Performance ◽  
Cell System ◽  
Performance Model ◽  
Test Cell ◽  
Test Facility ◽  
Engine Test ◽  
Combined System ◽  
Installation Effects ◽  
Engine Testing

To ensure the quality standards in engine testing, a growing research effort is put into the modeling of full engine test cell systems. A detailed understanding of the performance of the combined system, engine and test cell, is necessary e.g. to assess test cell modifications or to identify the influence of test cell installation effects on engine performance. This study aims to give solutions on how such a combined engine and test cell system can be effectively modeled and validated in the light of maximized test cell observability with minimum instrumentation and computational requirements. An aero-thermodynamic performance model and a CFD model are created for the Fan-Engine Pass-Off Test Facility at MTU Maintenance Berlin-Brandenburg GmbH, representing a W-shape configuration, indoor Fan-Engine test cell. Both models are adjusted and validated against each other and against test cell instrumentation. A fast-computing performance model is delivering global parameters, whereas a highly-detailed aerodynamic simulation is established for modeling component characteristics. A multi-disciplinary synthesis of both approaches can be used to optimize each of the specific models by calibration, optimized boundary conditions etc. This will result in optimized models, which, in combination, can be used to assess the respective design and operational requirements.

Fixturing of Compliant Parts Using a Matrix of Reconfigurable Pins

1999 ◽  
Vol 122 (4) ◽  
pp. 766-772 ◽  
Author(s):  
Daniel F. Walczyk ◽  
Randy S. Longtin
Keyword(s):  
Low Cost ◽  
Metal Composite ◽  
Lateral Loads ◽  
Load Carrying ◽  
Mechanical Models ◽  
Computer Controlled ◽  
Compliant Parts ◽  
Plastic Parts ◽  
Machining Operations ◽  
Rigid Platen

Commercially-available reconfigurable fixtures, used for holding compliant sheet metal, composite and plastic parts during secondary machining operations, are extremely expensive and overly-complicated devices. A computer-controlled, reconfigurable fixturing device (RFD) concept for compliant parts, based on a matrix of individually-stoppable pins lowered by a single rigid platen, has been developed as a simple and low-cost design alternative to commercially-available devices. Two different approaches to stopping and clamping individual pins have been investigated: a combination electromagnet assist and gas springs compressed with a toggle mechanism, and a pneumatic clamp. Simple mechanical models have been developed for predicting the stopping and clamping performance of both designs including pin positioning accuracy, vertical load-carrying capacity of a pin, and deflection of a pin subjected to lateral loads. An RFD prototype, consisting of a single pin actuated by a servoed platen, has been designed, built and tested. It has demonstrated the feasibility of this new RFD design. [S1087-1357(00)02204-8]

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.

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