Design of a University Nano-Satellite: the PiCPoT Case

Corso, D. Del; Passerone, Claudio; Reyneri, Leonardo; Sansoè, Claudio; Speretta, Stefano; Tranchero, Maurizio

doi:10.1109/taes.2011.5937278

Cited by 30 publications

(13 citation statements)

References 8 publications

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“…To highlight the importance of hardening the configuration bits in an actual system, let us suppose a Texas Instrument MSP430-based system (used in [1] [23]) having the following set of configuration bits: 12-bits ADC (36 bits), 2 UART(2 × 50 bits = 100 bits), clock (30 bits), four 8-bit I/O ports (32 × 4 = 128 bits), 2 timers (2 × 20 bits = 40 bits), Interrupt-Enable register (16 bits), Program Counter (PC) + Stack Pointer (SP) initial values (16 + 16 = 32 bits). That is, a total of 382 configuration bits.…”

Section: Motivationmentioning

confidence: 99%

A Hardware-Software Approach for On-Line Soft Error Mitigation in Interrupt-Driven Applications

Martínez-Álvarez

Restrepo-Calle

Cuenca-Asensi

et al. 2016

IEEE Trans. Dependable and Secure Comput.

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Abstract-Integrity assurance of configuration data has a significant impact on microcontroller-based systems reliability. This is especially true when running applications driven by events which behavior is tightly coupled to this kind of data. This work proposes a new hybrid technique that combines hardware and software resources for detecting and recovering soft-errors in system configuration data. Our approach is based on the utilization of a common built-in microcontroller resource (timer) that works jointly with a software-based technique, which is responsible to periodically refresh the configuration data. The experiments demonstrate that non-destructive single event effects can be effectively mitigated with reduced overheads. Results show an important increase in fault coverage for SEUs and SETs, about one order of magnitude.

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Section: Motivationmentioning

confidence: 99%

A Hardware-Software Approach for On-Line Soft Error Mitigation in Interrupt-Driven Applications

Martínez-Álvarez

Restrepo-Calle

Cuenca-Asensi

et al. 2016

IEEE Trans. Dependable and Secure Comput.

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“…every kilometer or so), as illustrated in Figure Each RSU contains a GPS, a radio transceiver, a laptop-class embedded computing device, such as the versatile low-power PC/104 system [113], powered by on-board battery packs charged by solar panels [114,115]. To minimize energy consumption, the RSUs are in a vigilant low-power mode when no cars are present and no traffic information needs processing.…”

Section: The Roadside Units (Rsu)mentioning

confidence: 99%

“…To minimize energy consumption, the RSUs are in a vigilant low-power mode when no cars are present and no traffic information needs processing. In this mode, we suggest two scenarios: first, the RSU will transmit only a periodic identification (every ∆t) beacon to alert approaching cars; second, the RSU is [116,114,115]. Furthermore, assuming that the battery supports approximately 2,000 charging cycles during its lifetime, the 20% per day discharge rate of the battery translates into a 6+ years of battery life [117,116].…”

Section: The Roadside Units (Rsu)mentioning

confidence: 99%

Friend: A cyber-physical system for traffic flow related information aggregation and dissemination

El-Tawab

Olariu

Almalag

2012

2012 IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks (WoWMoM)

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A cyber-physical system for traffic Flow-Related Information aggrEgatioN and Dissemination. By integrating resources and capabilities at the nexus between the cyber and physical worlds, FRIEND will contribute to aggregating traffic flow data collected by the huge fleet of vehicles on our roads into a comprehensive, near real-time synopsis of traffic flow conditions. We anticipate providing drivers with a meaningful, color-coded, at-a-glance view of flow conditions ahead, alerting them to congested traffic.FRIEND can be used to provide accurate information about traffic flow and can be used to propagate this information. The workhorse of FRIEND is the ubiquitous lane delimiters (a.k.a. cat's eyes) on our roadways that, at the moment, are used simply as dumb reflectors.Our main vision is that by endowing cat's eyes with a modest power source, detection and communication capabilities they will play an important role in collecting, aggregating and disseminating traffic flow conditions to the driving public. We envision the cat's eyes system to be supplemented by road-side units (RSU) deployed at regular intervals (e.g. every kilometer or so). The RSUs placed on opposite sides of the roadway constitute a logical unit and are connected by optical fiber under the median. Unlike inductive loop detectors, adjacent RSUs along the roadway are not connected with each other, thus avoiding the huge cost of optical fiber. Each RSU contains a GPS device (for time synchronization), an active Radio Frequency Identification (RFID) tag for communication with passing cars, a radio transceiver for RSU to RSU communication and a laptop-class computing device.The physical components of FRIEND collect traffic flow-related data from passing vehicles. The collected data is used by FRIEND's inference engine to build beliefs about the state of the traffic, to detect traffic trends, and to disseminate relevant traffic flow-related information along the roadway. The second contribution of this thesis is the development of an incident classification and detection algorithm that can be used to classify different types of traffic incident. Then, it can notify the necessary target of the incident. We also compare our incident detection technique with other VANET techniques.Our third contribution is a novel strategy for information dissemination on highways. First, we aim to prevent secondary accidents. Second, we notify drivers far away from the accident of an expected delay that gives them the option to continue or exit before reaching the incident location. A new mechanism tracks the source of the incident while notifying drivers away from the accident. The more time the incident stays, the further the information needs to be propagated. Furthermore, the denser the traffic, the faster it will backup. In high density highways, an incident may form a backup of vehicles faster than low density highways. In order to satisfy this point, we need to propagate information as a function of density and time.iv

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“…They also allow for cheaper designs as well as ease of mass production. Nanosats might be included and removed from the swarm in an ad hoc manner, which provides easier in-orbit maintenance [6].…”

Section: Introductionmentioning

confidence: 99%

Nano-satellite swarm for SAR applications: design and robust scheduling

Pang

Kumar

Goh

et al. 2015

IEEE Trans. Aerosp. Electron. Syst.

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In this paper, the design and robust scheduling of a nano-satellite (nanosat) swarm is presented for synthetic aperture radar (SAR) applications. Based on the power budget and bandwidth limit of nanosats, the nanosats' form factor and swarm size are chosen to ensure that requirements on ground resolution and signal-to-noise ratio are met. Next, an energy-efficient and robust scheduling considering stochastic failures is proposed using scenario optimization with convexification. The effectiveness of our proposed scheduling approach is verified with mathematical rigor as well as extensive simulation results on a realistic SAR application using strip and spot modes.

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Design of a University Nano-Satellite: the PiCPoT Case

Cited by 30 publications

References 8 publications

A Hardware-Software Approach for On-Line Soft Error Mitigation in Interrupt-Driven Applications

A Hardware-Software Approach for On-Line Soft Error Mitigation in Interrupt-Driven Applications

Friend: A cyber-physical system for traffic flow related information aggregation and dissemination

Nano-satellite swarm for SAR applications: design and robust scheduling

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