Chapter 5 Robust Performance Tailoring with Tuning - SSL - MIT

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Figure 5-7: Uncertainty points considered in Monte Carlo hardware simulation study,
∆ = 10%.
(Figure 5-8(a)), shows the nominal and tuned performances obtained for each of the
designs. The nominal performance values are denoted by gray dots forming a vertical
line. The maximum and minimum values are marked with horizontal error bars. The
tuned performances are plotted in a similar fashion but in balck. The requirement
is indicated by the solid line at 220µm. The nominal PT hardware covers a large
range of performance values ranging from 98.54µm to 1266.8µm. Once the poorly
performing designs are tuned the range is decreased considerably to a maximum value
of only 289.50µm. However, the maximum tuned value does not meet the performance
requirement indicating that some number of the PT simulations do not have sufficient
tuning authority. In contrast, the range of RPT peformances is very small. In the
nominal configuration the performances range from 259.81µm to 303.5µm, and once
tuned range from 249µm to 271.21µm. Note that none of the nominal designs meet
the requirement, and although tuning improves the performance, it is not sufficient to
bring the simulations within the required performance, and not a single tuned RPT
design is successful. The RPTT design has a greater range of nominal performance
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