Overview and GNC design of the CubeSat Proximity Operations Demonstration (CPOD) mission

Roscoe, Christopher W. T.; Westphal, Jason J.; Mosleh, Ehson

doi:10.1016/j.actaastro.2018.03.033

Cited by 47 publications

(24 citation statements)

References 9 publications

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“…The state space model, x(t)=[x, y, z,ẋ,ẏ,ż] T , is governed by the linear time varying system (LTV) given by Eq. (1)- (3). The independent variable of this LTV system can be changed from time to true anomaly leading to the simplified Tschauner-Hempel equations, see [34].…”

Section: Translational Motionmentioning

confidence: 99%

“…After decades of development, many approaches to achieve rendezvous for different mission profiles have been used, see [1] for an historical review or [2] for the basics. Nowadays, an increasing interest to demonstrate autonomous rendezvous and flight formation operations for lightweight and low-power spacecraft is arising with CPOD, PRISMA and PROBA-3 missions as examples, see [3,4,5].…”

Section: Introductionmentioning

confidence: 99%

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A flatness-based predictive controller for six-degrees of freedom spacecraft rendezvous

et al. 2020

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This work presents a closed-loop guidance algorithm for six-degrees of freedom spacecraft rendezvous with a passive target flying in an eccentric orbit. The main assumption is that the chaser vehicle has an attitude control system, based on reaction wheels, providing the necessary torque to change its orientation whereas the number of thrusters is arbitrary. The goal is to design fuel optimal manoeuvres while satisfying operational constraints and rejecting disturbances. The proposed method is as follows; first, the coupled translational and angular dynamics are transformed to equivalent algebraic relations using the relative translational states transition matrix and the attitude flatness property. Then, a direct transcription method, based on B-splines parameterization and discretization of time continuous constraints, is developed to obtain a tractable static program. Finally, a Model Predictive Controller, based on linearization around the previously computed solution, is considered to handle disturbances. Numerical results are shown and discussed.

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Section: Translational Motionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A flatness-based predictive controller for six-degrees of freedom spacecraft rendezvous

et al. 2020

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“…The DiGiTaL payload processing capabilities are inherited from the CPOD mission, including two flatsat development boards from Tyvak Nanosatellite Systems. These platforms integrate the DiGiTaL components during testing, including the NovAtel OEM628 receiver, the 800‐MHz Endeavor flight microprocessor, and an ultrahigh frequency (UHF) radio for communication between the two units.…”

Section: Project Overviewmentioning

confidence: 99%

“…As microsatellites and nanosatellites transition from being merely an educational tool to a viable scientific platform, many miniature DSS concepts have been proposed . For example, the CubeSat proximity operations demonstration (CPOD) will demonstrate rendezvous, proximity operations, and docking (RPOD) using two three‐unit (3U) CubeSats weighing approximately 5 kg . Due to the power, volume, mass, and cost constraints of small satellite systems such as CPOD, space‐hardened receivers like the BlackJack, and the integrated GPS occultation receiver (IGOR) are not feasible options for onboard navigation.…”

Section: Introductionmentioning

confidence: 99%

Distributed multi‐GNSS timing and localization for nanosatellites

Giralo

D’Amico

2019

NAVIGATION

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Recent advances in distribution and miniaturization among spacecraft and expansion of global navigation satellite systems (GNSS) motivate the Distributed Multi-GNSS Timing and Localization system. The DiGiTaL system is intended to provide nanosatellite swarms with unprecedented centimeter-level relative navigation accuracy in real time and nanosecond-level time synchronization through the integration of a multiconstellation GNSS receiver, a chipscale atomic clock, and an intersatellite link. This paper describes DiGiTaL's hardware and software design, architecture, and navigation software in detail.The swarming spacecraft are grouped into subsets, where differential GNSS is performed by a precise orbit determination module with integer ambiguity resolution in real time. The resulting precise orbits are then exchanged and fused by a swarm determination module, creating full-swarm knowledge. Finally, the DiGiTaL architecture is integrated into CubeSat avionics and tested with key hardware in the loop using Stanford's GNSS navigation testbed. For the first time, this paper shows the capability to perform centimeter-level precise relative navigation using commercial-off-the-shelf CubeSat hardware for spacecraft swarms.

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“…As micro-and nanosatellites transition from being merely an educational tool to a viable scientific platform, many small satellite-based distributed mission concepts have been proposed [19]. For example, the CubeSat Proximity Operations Demonstration (CPOD) will demonstrate rendezvous, proximity operations and docking (RPOD) using two 3-unit (3U) CubeSats weighing approximately 5 kg [20]. Due to the power, volume, mass, and cost constraints of small satellite systems such as CPOD, space-hardened receivers like the BlackJack [21] and the Integrated GPS Occultation Receiver (IGOR) [22] are not feasible options for onboard navigation.…”

Section: Introductionmentioning

confidence: 99%

Distributed Multi-GNSS Timing and Localization for Nanosatellites

Giralo

D’Amico

2018

Proceedings of the 31st International Technical Meeting of the Satellite Division of the Institute of Navigation (ION GNSS+ 201

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Recent advances in distribution and miniaturization among spacecraft and expansion of global navigation satellite systems (GNSS) motivate the Distributed Multi‐GNSS Timing and Localization system. The DiGiTaL system is intended to provide nanosatellite swarms with unprecedented centimeter‐level relative navigation accuracy in real time and nanosecond‐level time synchronization through the integration of a multiconstellation GNSS receiver, a chip‐scale atomic clock, and an intersatellite link. This paper describes DiGiTaL's hardware and software design, architecture, and navigation software in detail. The swarming spacecraft are grouped into subsets, where differential GNSS is performed by a precise orbit determination module with integer ambiguity resolution in real time. The resulting precise orbits are then exchanged and fused by a swarm determination module, creating full‐swarm knowledge. Finally, the DiGiTaL architecture is integrated into CubeSat avionics and tested with key hardware in the loop using Stanford's GNSS navigation testbed. For the first time, this paper shows the capability to perform centimeter‐level precise relative navigation using commercial‐off‐the‐shelf CubeSat hardware for spacecraft swarms.

show abstract

Overview and GNC design of the CubeSat Proximity Operations Demonstration (CPOD) mission

Cited by 47 publications

References 9 publications

A flatness-based predictive controller for six-degrees of freedom spacecraft rendezvous

A flatness-based predictive controller for six-degrees of freedom spacecraft rendezvous

Distributed multi‐GNSS timing and localization for nanosatellites

Distributed Multi-GNSS Timing and Localization for Nanosatellites

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