Integrated flight and propulsion control system design using H/sup ∞/ loop-shaping techniques

2003 ◽  
Author(s):  
D.G. Bates ◽  
S.L. Gatley ◽  
I. Postlethwaite ◽  
A.J. Berry
Keyword(s):  
Control System ◽  
System Design ◽  
Control System Design ◽  
Loop Shaping ◽  
Propulsion Control

Control Systems for the Next Century’s Fighter Engines

1992 ◽  
Vol 114 (4) ◽  
pp. 749-754 ◽  
Author(s):  
C. A. Skira ◽  
M. Agnello
Keyword(s):  
Control System ◽  
System Design ◽  
Control Systems ◽  
Engine Performance ◽  
Control System Design ◽  
Development Phase ◽  
Hardware Configuration ◽  
Propulsion Control ◽  
Technology Capability ◽  
Advanced Development

The paper describes a conceptual control system design based on advanced technologies currently in the exploratory development phase, and, in some cases, emerging into the advanced development phase. It explores future propulsion control systems that focus on improvements in three areas: (1) significantly reducing control system weight; (2) enhancing engine performance (thrust, sfc, etc.); and (3) improving control system reliability and tolerance to high-threat environments (temperature, vibration, EMI, EMP, etc.). The factors that will influence the design and hardware configuration of future propulsion control systems are described. Design goals for future systems, based on the DOD/NASA IHPTET Initiative, and projections of emerging technology capability (and availability) form the basis for future propulsion control system design requirements and for estimating future hardware configurations.

A Robustness Analysis Tool for Fleetwide Variability and Degradation Assessment in Propulsion Control Systems

2007 ◽  
Author(s):  
Carl Byington ◽  
Michael Roemer ◽  
Sanket Amin ◽  
Pattada Kallappa ◽  
Glen Karlsons
Keyword(s):  
Control System ◽  
System Design ◽  
Control Systems ◽  
Robustness Analysis ◽  
Flight Dynamics ◽  
Software Tool ◽  
Integrated Approach ◽  
Control System Design ◽  
Analysis Tool ◽  
Propulsion Control

The desire to enlarge the flight envelope of tactical aircraft and provide enhanced maneuvering capabilities has led to the use of forces and moments produced by the propulsion system to directly influence aircraft dynamics. This coupling between propulsion and flight dynamics is significant enough that traditional techniques for control system design and analysis are either conservative or inaccurate. An integrated approach is required in order to obtain an overall system that provides stability and performance with minimum pilot workload. The authors propose a solution that integrates existing techniques for linear robustness analysis, nonlinearity analysis, optimization, and robust identification into a software tool that facilitates the analysis of robustness of stability and dynamic performance of propulsion control systems and investigates the system’s ability to meet aggregate performance measures, specifically in the presence of fleet-wide component “variability.” The paper first discusses the motivation for the solution by identifying the variability problem in control system design. Following this, an overview of the proposed solution is presented with highlights of key elements, including a discussion on nonlinearity assessment techniques. The paper next describes the prototype version of the software tool and its initial analytical capabilities. Results of the prototype as applied against a nonlinear, engine control model using two different optimization routines, Genetic Algorithms and Particle Swarm Optimization, are presented to demonstrate the promising performance of both algorithms for finding the worst variability due to operating condition flight dynamics and aerothermal component degradation.

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