Incorporating functional partitioning into a synthesis methodology leads to several important advantages. In functional partitioning, we first partition a functional specification into smaller subspecifications and then synthesize structure for each, in contrast to the current approach of first synthesizing structure for the entire specification and then partitioning that structure. One advantage is the improvement in I/O performance and package count, when partitioning among hardware blocks with size and I/O constraints, such as FPGAs or blocks within an ASIC. A second advantage is reduction in synthesis runtimes. We describe these important advantages, concluding that further research on functional partitioning can lead to improved results from synthesis environments.

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A single-stage subsonic compressor was examined with respect to compressor instabilities. During the inception of rotating stall, the transients of the pressure rise and mass flow were measured as well as their hysteresis. The development of the stall cell and the characteristics of the unstable operating range were determined.Several measurement techniques and data analysis methods for the real-time detection of unstable compressor operation and aspects of their implementation on a digital signal processor are discussed.The results of the work are meant to serve as a basis for the design of an active stall avoidance system.

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