NASA SBIR 2010 Solicitation


PROPOSAL NUMBER: 10-1 A1.07-8520
SUBTOPIC TITLE: Adaptive Aeroservoelastic Suppression
PROPOSAL TITLE: Adaptive Linear Parameter Varying Control for Aeroservoelastic Suppression

SMALL BUSINESS CONCERN (Firm Name, Mail Address, City/State/Zip, Phone)
P.O. Box 13377
Minneapolis, MN 55414 - 5377
(651) 602-9732

PRINCIPAL INVESTIGATOR/PROJECT MANAGER (Name, E-mail, Mail Address, City/State/Zip, Phone)
Peter Seiler
P.O. Box 13377
Minneapolis, MN 55414 - 5377
(734) 262-0820

Estimated Technology Readiness Level (TRL) at beginning and end of contract:
Begin: 3
End: 4

TECHNICAL ABSTRACT (Limit 2000 characters, approximately 200 words)
Adaptive control offers an opportunity to fulfill present and future
aircraft safety objectives though automated
vehicle recovery while maintaining performance
and stability requirements in the presence of unknown or
varying operating environment.
Future aircraft are a natural application of adaptive control. These
aircraft will be more fuel efficient, have longer operating ranges though
more flexible aircraft structures. This
increased flexibility will result in structural modes being in the
same frequency range as the rigid body modes. The traditional
non-adaptive control design approach to address the aeroservoelastic (ASE)
interaction of decoupling the rigid body and structural dynamics
will not work. Furthermore, the application of adaptive control
to these flexible aircraft may result in
undesired ASE excitation
leading to structural damage or failure. Hence
an integrated flight control system is needed for gust load
alleviation, flutter suppression and rigid body control of the
aircraft which works in concert with the adaptive control system
for improved resilience and safety.
MUSYN proposes an integrated approach based on linear, parameter-varying
(LPV) control to the design of the
flight control, load alleviation and flutter suppression algorithms.
The Phase I and Phase II research will focus on applying and
extending LPV techniques to model, design, analyze and
simulate control algorithms for flexible aircraft.
The objective is to combine the integrated
LPV flight control system with adaptive control to
preserve rigid body performance during upsets while retaining the load
alleviation and flutter suppression characteristics of the
nominally augmented aircraft.
Phase I will develop a prototype LPV framework for modeling, analysis,
control and simulation and Phase II will develop a comprehensive
LPV software tool suite.

POTENTIAL NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
The immediate NASA application will be the X-53 Active
Aeroelastic Wing (AAW) test bed at NASA Dryden. This aircraft will provide
an experimental flight test capability for aeroservoeleastic
control research. NASA and the USAF developed this test bed to
investigate the use of wing aeroelastic flexibility for improved
performance of high aspect ratio wings. The AAW test bed is
an ideal facility to use the LPV framework for modeling, analysis,
control and simulation. The proposed research will develop
an integrated LPV flight control, gust alleviation and flutter suppression
system for the AAW test bed. The performance and robustness
of the LPV design will be accessed and compared with a baseline
aeroservoelastic system.

POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
Non-NASA commercial applications fall under two categories:
(1) Uninhabited aerial systems (UASs) like SensorCraft, for
intelligence, surveillance and reconnaissance (ISR) and
(2) Space, automotive and ship transportation systems. MUSYN
or the companies it has worked with have already demonstrated
the application of LPV control techniques to
aircraft, launch vehicles, automotive suspensions,
trucks, missiles and underwater vehicles. All these systems
are seeing increased aeroservoelastic coupling due to the push
for more efficient, lightweight structures. The software tool
develop in the SBIR addresses a unique need that is currently
only being addressed by European aerospace companies using
proprietary software tools. A Matlab based LPV Control Toolbox
would address a need in the US aerospace and
transportation communities and complement the
robust control tools already developed MUSYN.

TECHNOLOGY TAXONOMY MAPPING (NASA's technology taxonomy has been developed by the SBIR-STTR program to disseminate awareness of proposed and awarded R/R&D in the agency. It is a listing of over 100 technologies, sorted into broad categories, of interest to NASA.)
Algorithms/Control Software & Systems (see also Autonomous Systems)

Form Generated on 09-03-10 12:12