Combining image processing and optimization techniques, we automatically align a lattice of points (atoms) with horizons and faults in a 3-D seismic image. Connecting these points yields an unstructured space-filling polyhedral (atomic) mesh. This single data structure can integrate multiple tasks, such as seismic interpretation, reservoir characterization, and flow simulation, thereby reducing...

CMOS data latches used in critical applications must be immune to soft errors such as single event upsets. Existing designs protect the stored data against errors in the internal nodes, but may be vulnerable to transient faults in the control and data lines. The problem becomes more severe as feature sizes decrease. In this paper, we enhance the Dual Interlocked Storage Cell (DICE) to withstand...

This paper aims at the blade root moment sensor fault detection and isolation issue. The underlying problem is crucial to the successful application of the individual pitch control system which plays a key role for reducing the blade loads of large offshore wind turbines. In this paper, a wind turbine model is built based on the closed loop identification technique, where the wind dynamics is i...

Recently, technology trends have been leading to increasing transient and permanent faults. To address the problem, space redundancy such as dual modular redundancy (DMR) and triple modular redundancy (TMR) are commonly adopted for fault detection and correction. As introduced in paper [1], using a fine-grained space redundancy named Dynamic Adaptive Redundant Architecture (DARA), only multiple...

This paper develops a fault detection and isolation (FDI) and active fault tolerant control (FTC) of pitch actuators in wind turbines (WTs). This is accomplished combining a disturbance compensator with a controller, both of which are formulated in the discrete-time domain. The disturbance compensator has a dual purpose: to reconstruct the actuator fault (which is used by the FDI technique) and...

Abstract: Multi-phase motors are gaining more attention due to the advantages of good fault tolerance capability and high power density, etc. By applying dual-rotor technology to multi-phase machines, a five-phase dual-rotor permanent magnet synchronous motor (DRPMSM) is researched in this paper to further promote their torque density and fault tolerance capability. It has two rotors and two se...

The shrinking of technology nodes allows higher performance, but susceptibility to soft errors increases. protection has been implemented mainly by lockstep or hardened process techniques, which results in a lower frequency, larger area, and power consumption. We propose technique that only slightly affects the maximal frequency. area consumption increase are comparable with dual architectures....

we introduce the notions of t-dual rickart and strongly t-dual rickart modules. we provide several characterizations and investigate properties of each of these concepts. it is shown that every free (resp. finitely generated free) $r$-module is t-dual rickart if and only if $overline{z}^2(r)$ is a  direct summand of $r$ and end$(overline{z}^2(r))$ is a semisimple (resp. regular) ring. it is sho...