Few initial comments on the linear capabilities.
Missing comments for the aeroelastic framework of the linear part.
@@ -51,8 +51,8 @@ applications, where the largest blades are now well over 100-m long.
These longer and much slender structures can potentially present large ($+10%$) deflections
-and have relatively low frequency structural modes which can interact with the flight
-dynamics modes of the aircraft. Due to this, the
+and have relatively low frequency structural modes which, in the case of aircraft, can interact with the flight
+dynamics modes with potentially unstable couplings. Due to this, the
conventional quasi-linear methods may not accurately capture the relevant
phenomena present in the aeroelastic response of these new configurations.
@@ -65,7 +65,7 @@ through a modular object-oriented design, and already includes tools for
linear and nonlinear analysis of the time-domain aeroelastic response of flexible bodies
in a large number of cases, such as 3-D discrete gust [@IFASD] and turbulent field input [@YA1],
control surface deflection and prescribed motion [@Scitech]. In addition, linearised
-state-space models can be obtained for control design and model reduction.
+state-space models can be obtained for frequency domain analysis, controller design and model reduction.
This code is actively developed at the Loads Control and Aeroelasticity Lab at
@@ -106,6 +106,8 @@ The coupling algorithm included in the code is designed to allow fully coupled
nonlinear simulations, although weakly coupled solutions can be obtained. Independent
structural or aerodynamic simulation are supported natively.
+The nonlinear system can also be linearised taking an arbitrary reference condition. The linearised system can be used for frequency domain analysis and linear model order reduction methods and controller design.
+
The code distributed in the repository includes modules to directly simulate:
* Static linear and nonlinear structural solutions
@@ -116,6 +118,9 @@ The code distributed in the repository includes modules to directly simulate:
* Static aeroelastic solutions and flexible aircraft longitudinal trimming
* Control surface controller in the loop
* Unsteady fully-3D turbulent field input, working in-memory or in-disk, including time-domain interpolation between snapshots
+* Linearisation of the nonlinear system at an arbitrary reference
+* Stability analysis and frequency response
+* Model order reduction using moment matching methods, modal reduction or balanced truncation
# The ``SHARPy`` aeroelastic framework
@@ -123,7 +128,7 @@ The code distributed in the repository includes modules to directly simulate:
![Static simulation of the XHALE nonlinear aeroelasticity
testbed.](https://github.com/ImperialCollegeLondon/sharpy/raw/master/docs/source/media/XHALE-render.jpg)
-The main solver in ``SHARPY`` is a time-domain geometrically nonlinear coupled solver [@Palacios2010]
+The main solver in ``SHARPy`` is a time-domain geometrically nonlinear coupled solver [@Palacios2010]
with a Block Gauss-Seidel iteration scheme between the structural and aerodynamic
solutions.
@@ -193,31 +198,6 @@ modify numerical parameters on the loop.
# Acknowledgements
-A. Carre gratefully acknowledges the support provided by Airbus Defence and Space.
+A. Carre gratefully acknowledges the support provided by Airbus Defence and Space. Norberto Goizueta's research is kindly sponsored by the Department of Aeronautics at Imperial College for which the author is truly grateful.
# References
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
