Global buses in deep-submicron (DSM) system-onchip designs consume significant amounts of power, have large propagation delays, and are easy to catch transmission errors due to DSM noise. A comprehensive fault-tolerant mechanism for transient and permanent failures is proposed in this paper. Based on the special NoC with a network monitor, a flit level point-to-point error detection scheme is added to routers to handle transient failures on the data links, while a dynamic routing mechanism is produced to deal with permanent link failures as well. In addition, there is some Build-in testing of the monitor to increase the reliability of the architecture. The result of the experiment demonstrates the advantage of the mechanism in terms of throughput and latency, while the consumptions of area and power overheads are acceptable.I.

Due to the small tilt angle, a tiltrotor operates in non-axial flow conditions during shipboard take-off and landing. The non-uniformity of the blade’s air-load is high, resulting in structural deformation with high fluctuation frequency, affecting the rotor’s aerodynamic characteristics. A new computational fluid-dynamic computational structural dynamics (CFD-CSD) solver is proposed to analyze the effects of the blade’s elastic deformation on the aerodynamic characteristics. This method is suitable for the aeroelastic simulation of shipboard tiltrotor take-offs and landings. The CFD method uses the Reynolds-averaged Navier-Stokes (RANS) equations as the control equation, while the CSD solver is based on the Timoshenko beam model. The solvers are combined with a two-way loose coupling strategy to improve the solution efficiency. The reverse overset assembly technique (ROAT) is utilized to eliminate the effects of orphan mesh points after deformation. The simulation is conducted during take-off and landing at different heights and different tilt angles, using the XV-15 tiltrotor as an example. An analysis of the rotor’s air-load and the mutual interference of the vortex and wake indicates that when the tiltrotor takes off or lands with a small tilt angle, the wing shedding vortex causes the rotor’s wake to roll upward before it reaches the ship’s deck, producing strong thrust fluctuations. The elastic deformation of the blade reduces the fluctuations in the thrust amplitude. This phenomenon is more pronounced in areas of high fluctuations in the blade’s air-load.

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