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ISO 16290-2013 pdf free download
ISO 16290-2013 pdf free download.Space systems — Definition of the Technology Readiness Levels (TRLs) and their criteria of assessment
Systèmes spa tiaux — Definition des Niveaux de Maturité de Ia Technologie (NMT) et de leurs critères d’évaluation.
TRL 5 is reached when the critical functions of the element are demonstrated in the relevant environment using appropriate breadboards, which are generally not full scale or lull function. The test performance is in agreement with analytical predictions.
AtTRL 5, the mission objectivesand operational environment are preliminary but sufficiently understood for enabling a preliminary definition of: the element performance requirements, the associated relevant environment, and the preliminary design of the element. Missing or incomplete requirements are acceptable at this stage as far as they do not affect the identification of the element critical functions and the associated verification plan.
For reaching TRL 5, the critical functions ofthe element are identified, requiring specific verification, and the corresponding relevant environment Is defined. In relation with the critical functions identification, scaling requirements are defined and a verification plan is established and the breadboard tests successfully executed for securing the element performance and removing the unknowns.
The breadboards can be tailored to the critical function verification needs but shall be representative of the element, as necessary for unambiguously removing the unknowns and demonstrating the element performance.
It is worth noting that some of the critical function unknowns can be related to the performance requirements themselves. For example, a performance or design parameter can be unknown or inaccurately specified, although clearly associated to a critical function and to well-defined mission performance requirements. For this specific case, the breadboard demonstration should mitigate the uncertainty on this parameter, with potential feedback on the element design.
When TRL 5 is reached, the element feasibility can be considered as demonstrated, subject to scaling effects, since the critical functions performance is verified through breadboard testing in the relevant environment. The element performance requirements are often consolidated at this stage, taking into account the breadboard verification tests. However, the element development is not fully secured because of uncertainty resulting from scaling effects. There are also remaining risks associated with a failure in the identification of critical functions, a lack of completeness in the associated verification plan, and/or an underestimation of coupling effects between the element parts that make the model(s) inappropriate for removing the unknowns.
The following are examples of TRL 5:
a) A 3,5 m two-mirror space telescope is proposed for far infrared astronomy and is operated at 70 K. The primary mirror is parabolic and is made of 12 silicon carbide petals assembled with a high-temperature brazing process. The optical performance in cold environment is identified as a critical function and the 3,5 m primary mirror as a critical part. ISO 16290-2013 pdf free download.
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