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spacecraft attitude

De noising Spacecraft Attitude and Rate Data using DWT

De noising Spacecraft Attitude and Rate Data using DWT

... Spacecraft attitude [1] and body rate play an important role in obtaining the final image or the so called data ...data, spacecraft attitude and body rates also will be down ...the ...

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Simplified Filtering Estimator for Spacecraft Attitude Determination from Phase Information of GPS Signals

Simplified Filtering Estimator for Spacecraft Attitude Determination from Phase Information of GPS Signals

... determine attitude of ...the spacecraft dynamics. In the traditional approach, spacecraft attitude determination depends on attitude sensors, such as magnetometers, Sun sensors, Earth ...

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Earth’s Magnetic Field for Spacecraft Attitude Control Applications (TECHNICAL NOTE)

Earth’s Magnetic Field for Spacecraft Attitude Control Applications (TECHNICAL NOTE)

... for spacecraft attitude control is a common way since the actuator is light, non- expensive and relatively easy to ...for spacecraft attitude control and its considerations, such as using ...

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Multi-objective Optimization of Zero Propellant Spacecraft Attitude Maneuvers

Multi-objective Optimization of Zero Propellant Spacecraft Attitude Maneuvers

... NASA has successfully conducted two Zero Propellant Maneuver (ZPM) missions on 5 November 2006 and 3 March 2007, when the International Space Station (ISS) was rotated by 90¡ [1] and 180¡ [2], respectively. The ZPM ...

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Adaptive flault-tolerant control of spacecraft attitude dynamics with actuator failures

Adaptive flault-tolerant control of spacecraft attitude dynamics with actuator failures

... This type of nano-spacecraft does not undergo the rigorous testing of a conventional multi-tonne spacecraft and thus is more susceptible to faults. The real UKube-1 is not equipped with reaction wheels; ...

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Preliminary Design of Spacecraft Attitude Control with Pulse-Width Pulse-Frequency Modulator for Rest-to-Rest Maneuvers

Preliminary Design of Spacecraft Attitude Control with Pulse-Width Pulse-Frequency Modulator for Rest-to-Rest Maneuvers

... The preliminary design of PWPFM parameters has been performed for quasi- normalized equations for a single-axis attitude control of rigid spacecraft in quasi-normalized form and the preferred regions of ...

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Attitude control of large gossamer spacecraft using surface reflectivity modulation

Attitude control of large gossamer spacecraft using surface reflectivity modulation

... the attitude control framework will be outlined, using a quaternion feed- back controller to compute the reference torques that have to be matched by the actuating RCD matrix in order to steer the ...optical ...

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Integrable Hamiltonian systems defined on the Lie groups SO(3) and SU(2) : an application to the attitude control of a spacecraft

Integrable Hamiltonian systems defined on the Lie groups SO(3) and SU(2) : an application to the attitude control of a spacecraft

... In the first part of this paper we derive these equations using the maximum principle of optimal control and the second part of the paper involves integrating these Lax Pair Equations (6) to obtain the corresponding ...

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Quaternion-based Finite-time Sliding Mode Controller Design for Attitude Tracking of a Rigid Spacecraft during High-thrust Orbital Maneuver in the Presence of Disturbance Torques

Quaternion-based Finite-time Sliding Mode Controller Design for Attitude Tracking of a Rigid Spacecraft during High-thrust Orbital Maneuver in the Presence of Disturbance Torques

... other attitude parameters such as Euler angles or direction cosine ...describing spacecraft attitude kinematics in terms of Euler angles, therefore, it cannot be considered as an effective method for ...

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Nonlinear observers for attitude estimation in gyroless spacecraft via Extended Kalman filter algorithm

Nonlinear observers for attitude estimation in gyroless spacecraft via Extended Kalman filter algorithm

... literature, spacecraft attitude estimation use different attitude representation either Euler angles, Rodrigues parameter, or quarternion parameteras their kinematic model ...angles attitude ...

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Robust Attitude Control of Spacecraft Simulator with External Disturbances

Robust Attitude Control of Spacecraft Simulator with External Disturbances

... The spacecraft attitude control subsystem simulator consists of a platform, an air-bearing and a set of four reaction ...rotation. Spacecraft simulators are applied in upgrading and checking the ...

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A quaternion-based attitude tracking controller for robotic systems

A quaternion-based attitude tracking controller for robotic systems

... Bhat,S. P., Bernstein D, S., 2000 A topological obstruction to continuous global stabilization of rotational motion and the unwinding phenomenon Systems & Control Letters. 39,6370. Fragopoulos, D., Innocenti, M. 2004 ...

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Manoeuvring considerations for quasi-periodic trajectories

Manoeuvring considerations for quasi-periodic trajectories

... transfer spacecraft between quasi-periodic orbits and to compensate phase differences between spacecraft bringing together the parametric orbit and manifold ...two spacecraft are separated from a ...

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Attitude Control and Angular Reorientations of Dual-Spin Spacecraft and Gyrostat-Satellites Using Chaotic Regimes Initiations

Attitude Control and Angular Reorientations of Dual-Spin Spacecraft and Gyrostat-Satellites Using Chaotic Regimes Initiations

... DSSC attitude reorientation using initiation of chaotic dynamical ...the attitude control/reorientation of the small simple satellites ...the attitude reorientation we must perform the DSSC capture ...

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Solitary waves observed in the auroral zone: the Cluster multi-spacecraft perspective

Solitary waves observed in the auroral zone: the Cluster multi-spacecraft perspective

... 13 ms time period around 10:23:06 UT on 6 April 2002 are shown in panels (A) and (B). Note that the angles of the an- tenna with respect to the magnetic field are within 10 ◦ of each other for this example. Note also ...

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A geostationary equivalent Polar observation system

A geostationary equivalent Polar observation system

... a spacecraft above one of the Earth‟s poles at around 2 - 3 million kilometers altitude, by means of continuous acceleration provided by a solar sail, electric propulsion (EP) system or combination of the two, to ...

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Space and ground segment performance and lessons learned of the FORMOSAT-3/COSMIC mission: four years in orbit

Space and ground segment performance and lessons learned of the FORMOSAT-3/COSMIC mission: four years in orbit

... (SOH) inspection and hardware/software initialization. The measured performance of the in-orbit spacecraft compared to the expected results from the relevent ground tests show the SOH of a specarft in orbit. Some ...

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On the fine structure of dipolarization fronts

On the fine structure of dipolarization fronts

... both spacecraft of oscillations in the B int component at the same time as the increase in the B max ...by spacecraft 1 and 4 data (as shown in Figure ...

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Simultaneous SuperDARN and Cluster observations of the growth and expansion phases of substorms

Simultaneous SuperDARN and Cluster observations of the growth and expansion phases of substorms

... The large-scale dynamics of the plasma sheet during a substorm can be studied using data from instruments on spacecraft such as the four Cluster spacecraft. The corresponding dynamics closer to Earth can be ...

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A fractally fractionated spacecraft

A fractally fractionated spacecraft

... between spacecraft are designed to be with reference to the mission ...When spacecraft carry radio antenna designed to work as a distributed array, design distance depends on the wavelength ...several ...

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