Investigation of a command and data handling architecture for the SUNSAT-2 micro satellite

[摘要] ENGLISH SUMMARY: This thesis investigates the design of a Command and Data Handling (C&DH) system forpossible use on future SUNSAT satellites. The investigation begins with a description ofthe underlying components of a general C&DH system, namely telemetry (TLM) andtelecommand (TCMD). From the subsequent evaluation of these subsystems onSUNSAT-1, several recommendations to improve their functionality on the proposedC&DH design are made. Preliminary design specifications and requirements are then setup for the new design. The main requirements are flexibility and reliability.A logical improvement from the centralised TLM and TCMD designs used on SUNSAT-1,is identified, namely a bus architecture for the proposed C&DH system. Several bustechnologies are subsequently evaluated and from this, Controller Area Network (CAN)technology is chosen as a suitable, relatively high speed serial bus. Several systemarchitectures to implement CAN with on the C&DH system are then evaluated. Theconcept of CAN nodes within the C&DH system is explained, and from this, the detail ofsuch a node is presented, designed, and implemented in the form of a prototype hardwaresystem. The performance of the prototype is then evaluated against the set specificationsand requirements. Other work related to the design of a C&DH system covered in thisdocument, includes the evaluation of several international TLM and TCMD standards.From these, the recommendations ofthe Consultative Committee for Space Data Systems(CCSDS) are identified as a possible down- and uplink protocol on future satellites.

[发布机构] Stellenbosch University

[效力级别] DH)", "Consultative Committee for Space Data Systems (CCSDS)", "Dissertations -- Electronic engineering"]