This paper formulates the transfer function of Triple Modular Redundancy (TMR) Fault-tolerant sensors system. The first attempt was to present a practicable model of a triple modular redundancy faulttolerant system for sensors working synchronously with same input. Analogues and digital sensors are separately modeled to show the difference in their transfer functions as resulted from their diff...

International Symposium on Shared Memory Multiprocessing, 1991 20 Fault-Tolerant Design for Multistage Routing Networks Andr e DeHon, Thomas Knight Jr., and Henry Minsky As the size of digital systems increases, the average length of time between single component failures diminishes. To avoid component related failures, large computers must be fault-tolerant; that is, the computer must perform ...

A component-based software architecture is presented to support the process of designing and developing fault-tolerant computerised control systems. To this end, we combine an idealised fault-tolerant component, the C2 architecture style and protective wrappers, and embed fault tolerance techniques into component definitions. The resulting architecture is described by normaland abnormal-activit...

ÐIn a fault-tolerant distributed system, it is often necessary for nonfaulty processes to agree on the value of a shared data item. The criterion of Approximate Agreement does not require processes to achieve exact agreement on a value; rather, they need only agree to within a predefined numerical tolerance. Approximate Agreement can be achieved through convergent voting algorithms. Previous re...

Checkpointing is a relatively cost effective method for achieving fault tolerance in real-time systems. Since checkpointing schemes depend on time redundancy, they could affect the correctness of the system by causing deadlines to be missed. This paper provides exact schedulability tests for fault tolerant task sets under specified failure hypothesis and employing checkpointing to assist in fau...

In this paper, an active fault tolerant control (FTC) strategy is presented for linear dynamic systems. The robust observer-based fault detection and isolation (FDI) systems are applied to guide the reconfiguration of controller parameters to achieve the optimal control performance during different operating conditions of the system: fault-free, fault detected and fault isolated. The selection ...

Fault Tolerant Control for Bimodal Piecewise Affine Systems

The falling cost of both communication and mobile computing devices (laptop computers, hand-held computers, etc.) is making mobile computing affordable to both business users and private consumers. People on the road want to use their laptops to read Email, login on remote machines, buy or sell stocks, and so on; rescue workers at disaster sites (fires, floods, earthquakes, etc.) would like to ...

The expanding application of computing systems and the continuing advances in semiconductor technology are forcing the on-chip inclusion of design for dependability features (concurrent fault tolerance). These features detect, log and provide recovery from errors induced by faults concurrently with the operation of the system. A very difficult task is the hardware validation of concurrent fault...

In this paper, we study the fault-tolerant support for realtime applications. In particular, we study the scheduling issues and kernel support for fault monitors and the primary-backup task model. Using the powerful scheduling framework in RED-Linux, we can support a jitterless fault monitoring. We can also provide the task execution isolation so that an erroneous runaway task will not take awa...