Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Quaternion Based State Dependent Ricatti Equation Control of a Satellite Camera on Piezoelectric Actuators
Date
2010-08-05
Author
KAYASHTA, SHARMILA
Tekinalp, Ozan
ÖZGÖREN, KEMAL
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
47
views
0
downloads
Cite This
A two loop quaternion based state dependent Ricatti equation (QSDRE) control is proposed to improve the pointing performance of a large Earth Observation camera carried by a spacecraft. The system is modeled as two bodies, a spacecraft and a high resolution camera, connected by piezoelectric actuators to damp out vibrations, and a satellite mounted reaction wheel cluster to realize slew maneuvers. Disturbances coming from the unbalanced reaction wheels were also included in the model. The effectiveness of this two loop QSDRE control in improving the pointing performance demonstrated through simulations.
URI
https://hdl.handle.net/11511/69621
DOI
https://doi.org/10.2514/6.2010-8378
Collections
Department of Aerospace Engineering, Conference / Seminar
Suggestions
OpenMETU
Core
High velocity infrared thermography and numerical trajectories of solid particles in compressible gas flow
Lappa, M.; Esposito, A.; Aponte, F.; Allouis, Christophe Gerard (2019-02-01)
The use of High Velocity Infrared Thermography as a valuable alternative to other existing techniques for the visualization and tracking of solid particles transported by a gas jet has been assessed by considering different situations in terms of problem characteristic numbers (jet Reynolds and Mach numbers and Particle Stokes and gravitational Froude numbers). Particles paths have also been calculated by means of a hybrid Eulerian-Lagrangian technique under the intent to cross-validate the two (experimenta...
Electromagnetic Scattering from Obstacles in the Near Field Region of Electrically Large Arrays
Cetin, Ramazan; Aydın Çivi, Hatice Özlem; Nepa, Paolo; Manara, Giuliano (2009-09-18)
In this paper, an efficient method for the analysis of electromagnetic scattering/radiation from the obstacles nearby electrically large array antennas, with nonuniform excitation, is proposed. The approach is based on the combination of a ray field representation of electrically large arrays and a DFT (Discrete Fourier Transform) based representation of array current distribution. Proposed method is applied to a 2D problem: Radiation of a linear array of 2N+1 infinitely long current elements with tapered c...
POINTING PERFORMANCE CONTROL OF A SPACECRAFT CAMERA USING PIEZOELECTRIC ACTUATORS
Kayastha, Sharmila; Tekinalp, Ozan; Ozgoren, Kemal (2010-02-18)
A control system is designed to improve the pointing performance of a large Earth observation camera carried by a spacecraft. The spacecraft camera is mounted to the spacecraft thorough active truss members. The control system uses a cluster of reaction wheels together with piezoelectric struts. The improvement in the pointing performance using this dual actuator system is demonstrated through simulations.
Recursive Two-Way Parabolic Equation Approach for Modeling Terrain Effects in Tropospheric Propagation
Ozgun, Ozlem (2009-09-01)
The Fourier split-step method is a one-way marching-type algorithm to efficiently solve the parabolic equation for modeling electromagnetic propagation in troposphere. The main drawback of this method is that it characterizes only forward-propagating waves, and neglects backward-propagating waves, which become important especially in the presence of irregular surfaces. Although ground reflecting boundaries are inherently incorporated into the split-step algorithm, irregular surfaces (such as sharp edges) in...
ENSEMBLE MONTE-CARLO SIMULATION OF RAMAN-SCATTERING IN GAAS
GUNCER, SE; FERRY, DK (1994-01-28)
A picosecond laser excited GaAs p-i-n structure is studied using an ensemble Monte Carlo method to determine the temporal and spatial evolution of the hot electron distribution function. The experimental set-up we simulate is a novel method based on Raman scattering of light from the electrons to measure the drift velocity of electrons in GaAs at high electric fields. It is observed that the simulation agrees with the experimental results, however, the measured velocity is actually averaged over the time ev...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
S. KAYASHTA, O. Tekinalp, and K. ÖZGÖREN, “Quaternion Based State Dependent Ricatti Equation Control of a Satellite Camera on Piezoelectric Actuators,” 2010, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/69621.