52 results about "Error-tolerant design" patented technology

Methods, storage mediums, and apparatuses for evaluating the reliability of Three-Dimensional (3D) Network-on-Chip (NoC) designs are described. The described embodiments provide a 3D NoC specific fault-injector tool which is able to model logic-level fault models of 3D NoC specific physical faults in 3D-NoC platform. These embodiments automate the whole process of static and dynamic fault injection base on the user preference and reports the specific reliability metrics for 3D NoC platform as a single tool. The described embodiments can be used for the reliability evaluation and effectiveness of fault-tolerant designs in any of the 3D-many core designs such as manycore systems in different ranges of application from embedded systems in cellphones to larger systems which can be used in next generation of autonomous cars or hypercube memory cells.

The present invention provides a fault injection method based on programmable logic device and its device. Its kernel lies in that a fault injection module is set in the interior of programmable logic device having need of making fault injection to obtain the signal of the described programmable logic device, the described fault injection module can inject the correspondent fault into the obtained signal and can output the signal in which the fault is injected. Said invention has no need of external fault injection equipment or scrambling equipment, and can utilize the fault injection module set in the interior of programmable logic device to make fault injection process have no need of manual intervention and do not damage the programmable logic device.

The invention discloses a fault-tolerant design method of a self-reconfigurable D/TMR (Dual/Triple Modular Redundancy) system based on an FPGA (Field Programmable Gate Array), comprising the following work steps: (a) utilizing a DMR bit stream to configure a dynamic reconfigurable area; (b) detecting the state of a DMR system through a detection circuit and judging whether faults exit; if not, keeping a DMR state of the dynamic reconfigurable area; otherwise, reading a configuration TMR bit stream on a CF (Collaborative Filtering) card; and configuring the dynamic reconfigurable area into a TMR state. The fault-tolerant design method provided by the invention can overcome the disadvantages of a fault-tolerant mechanism, has the advantages of higher resource utilization rate, high fault-tolerant capability and high reliability, and can realize rapid self-repairing of faults. The invention further discloses the self-reconfigurable D/TMR system based on the FPGA.

Aggressive technology scaling impacts parametric yield, life span, and reliability of circuits fabricated in advanced nanometric nodes. These issues may become showstoppers when scaling deeper to the sub-10 nm domain. To mitigate them various approaches have been proposed including increasing guard-bands, fault-tolerant design, and canary circuits. Each of them is subject to several of the following drawbacks; large area, power, or performance penalty; false positives; false negatives; and in sufficient coverage of the failures encountered in the deep nanometric domain. The invention presents a highly efficient double-sampling architecture, which allow mitigating all these failures at low area and performance penalties, and also enable significant power reduction.

The invention discloses a fault injection design and verification method of a memory with EDAC error tolerance. Reading and writing access of a data/instruction domain and a check domain is controlleddifferently according to working modes, in the test mode, during reading operation of the data/instruction domain, a control signal of the reading operation of the data/instruction domain is only effective, and test reading access of the data/instruction domain is realized; during reading operation of the check domain, a control signal of the reading operation of the check domain is only effective, and test reading access of the check domain is realized; during fault injection of the data/instruction domain, a control signal of the writing operation of the data/instruction domain is only effective; during fault injection of the check domain, a control signal of writing operation of the check domain is only effective, and any fault injection of the data/instruction domain and the check domain is realized. Independent reading and writing access of the data/instruction domain and the check domain is realzied, and testability of the memory after error tolerance design is guaranteed.

The invention, which belongs to the technical field of unmanned ship control, relates to an unmanned ship fault estimation method based on an iterative adaptive observer. The method comprises the steps: decomposing an unmanned surface vessel model containing steering engine failures and sensor failures into two subsystems simultaneously through coordinate transformation, enabling subsystem 1 to only contain steering engine failures and the subsystem 2 to only contain sensor failures; for the subsystem 1, designing an adaptive fault observer to estimate a steering engine efficiency factor; forthe subsystem 2, designing an iterative adaptive fault observer to estimate a sensor fault; and establishing an error equation of the subsystem 1 and the subsystem 2, and judging the stability of theerror system. According to the inbvention, accurate estimation of the fault condition of the unmanned ship system can be realized, and information such as the fault occurrence time, the development process and the severity degree of the fault is given, so that the safety of the unmanned ship can be conveniently monitored by an operation center; the steering engine failure condition and the sensorfailure condition of the unmanned ship can be estimated at the same time, so that the cost of fault-tolerant design is reduced.

The invention discloses a fault-tolerant design method of an absolute photoelectric encoder measuring channel. The method comprises: subjecting a fine code angle data Dc9 state and with an A13 channelsignal to timing sequence fusion obtain a turning signal; setting a twelve-bit reversible counter according to the turning signal; performing state diagnosis on the A13 channel and the fine code channel; and in case of abnormal state diagnosis, setting the initial value of the twelve-bit reversible counter by coarse code and fine code channel level timing sequence features. When fine code channels J1 and J2 and a medium code channel A13 are normal, and at least one of A1 to A8 channels is normal, the method can automatically correct errors within one round at the initial power up, outputs correct angle data, and greatly improves reliability.

The invention discloses a register single event effect analog simulation method for an aerospace chip. The method comprises the steps of constructing a parameterized register fault simulation model; randomly replacing the normal register simulation model in the chip netlist with a register fault simulation model, wherein the replacement number is determined by the error turnover rate of the spacenavigation chip set in the space environment and the total number of registers in the chip, the error occurrence time of the registers is randomly selected from 0 to the maximum simulation time, simulating the simulation fault module behavior through a simulation tool, and then verifying the effectiveness of the chip-level register fault-tolerant strategy. According to the method, the single eventeffect soft error can be simulated and the hard error formed by the high-energy single event effect can be simulated without analyzing codes and independently designing a test case. The method can support the aerospace radiation reinforcement research and can be applied to verification and analysis of fault-tolerant design of the single event effect fault.

The invention discloses a remote control decoding fault-tolerance method. When the received remote control key-pressing code is a repeated key-pressing code, a tolerance value is given. When the code error rate of the remote control decoding is lower than the tolerance value, the key-pressing value with code error is set as the key-pressing value corresponding to the last key-pressing. When the code error rate of the remote control decoding is higher than the tolerance value, the key-pressing value with code error is set as the key-pressing value corresponding to no operation of key-pressing. Thus false action of the TV set can be prevented. In the invention, the fault-tolerance design is added to the remote control decoding software, namely, certain tolerance for code error is provided. When the code error rate is lower than the tolerance value, the key-pressing is considered as repeated; when the code error rate is higher than the tolerance value, no key-pressing is believed to occur until the key is released. The tolerance value is determined according to the light or electromagnetic wave disturbance degree in the environment, thus the remote control reliability of the TV set is effectively improved and false action of the TV set is prevented, which is good for promoting the whole quality of the TV set.

A process method for applying a machine learning algorithm to automobile software development function safety comprises the following seven steps: step 1, a project starting stage: adopting a machinelearning decision-making door; 2, a software security requirement stage: standardizing and describing security requirements; Step 3, a software architecture design stage: adopting a fault-tolerant design method; 4, a software development stage: collecting data; 5, a software development stage and model selection; 6, a software development stage and model implementation are carried out; And 7, a software integration stage, verification and testing. According to the method, in the development process of automobile electronic software, the property of partial standardized description is clear, analgorithm feature selection model based on various machine learning is facilitated, and then the development efficiency and safety are improved. Based on the above, the method has a good applicationprospect.

The invention discloses a DCS external-mounting intelligent control system and method based on the fault-tolerant design. The system is characterized in that a signal input module, a signal processingmodule and a DCS automatic control module are sequentially connected; the DCS automatic control module, an automatic tracking undisturbed switching module and a signal output module are sequentiallyconnected; the signal processing module, a DCS Modbus communication module, an external-mounting Modbus communication module and an external-mounting control module are sequentially connected, a fault-tolerant control module is connected with the DCS automatic control module and the automatic tracking undisturbed switching module, and a communication verification and fault tolerance module is connected with the Modbus communication module and the external-mounting control module. The system and method disclosed by the invention can effectively solve a problem of poor reliability of the DCS external-mounting control system.

A system is provided for synchronizing clocks. The system includes a plurality of devices in a network, each device having a local clock. The system is configured to synchronize the local clocks according to a primary spanning tree, where the primary spanning tree has a plurality of nodes connected through a plurality of primary links, each node of the plurality of nodes representing a respective device of the plurality of devices. The system is also configured to compute a backup spanning tree before a failure is detected in the primary spanning tree, wherein the backup spanning tree includes one or more backup links that are different from the primary links. As such, upon detection of a failure in the primary spanning tree, the system reconfigures the plurality of devices such that clock synchronization is performed according to the backup spanning tree.

The invention relates to a Zynq-7000-based scratch-pad memory single event upset protection method which is applied to a memory fault-tolerant design of Zynq-7000SoC in a space environment, and aims to solve the problems that single event upset affects data reliability of a memory on an internal pad of a Zynq-7000 chip in a space environment. Correct communication between dual-core processors in the Zynq-7000 chip is guaranteed. On the basis of resource characteristics of the Zynq-7000 chip, data reinforcing operation of communication between the dual-core processors and the scratch-pad memory is realized by a software EDAC method, state tags of a single-bit error and a dual-bit error and dual-core synchronous write-back operation of the single-bit error are realized by a software interruption mode, and functions of single-error-correcting and double-error-detecting and data write-back of data are fulfilled in an ARM processor, therefore, the single event upset resistance of the memory on the internal pad of Zynq-7000 is improved, and an important means is provided for reliability of data communication between the dual-core processes in Zynq-7000 SoC.

The invention discloses a cooperative self-adaptive cruise control fault-tolerant design system based on expected function safety, and aims at cooperative self-adaptive cruise control of an intelligent network connection automobile technology to carry out fault-tolerant design based on the expected function safety. The system includes two parts of: hazard analysis and evaluation based on expected function safety, function improvement and test evaluation and performance defect fault-tolerant control based on the expected function safety. wherein the performance defect fault-tolerant control based on expected function safety comprises an information acquisition layer, an upper-layer controller fusing performance defect tolerance, decision logic, a CACC fault-tolerant lower-layer controller and a car following execution layer. The invention aims to provide a cooperative self-adaptive cruise control fault-tolerant design architecture based on expected function safety, which is used for solving the problem of vehicle damage caused by insufficient design and functional defects of the existing cooperative self-adaptive cruise control function, and ensuring the driving safety in a cooperative self-adaptive cruise control function mode.

The invention discloses an SEU fault tolerance design applied to an FPGA. An idea of a reconfigurable technology is used for SEU fault tolerance in the FPGA to improve the operation reliability of a system. Switching of a logic function is achieved by a reconfigurable region A through dynamically loading a configuration file A1.bit or A2.bit.

The invention discloses an A/C-mode responder system with the anti-human error function. The system comprises three LRUs: a transceiver host, a control box and an omnidirectional antenna. The transceiver host mainly completes processing of a transceiving signal, protocol processing, interface adaptation, and emergency identification and management and is capable of monitoring the system state to identify an external operation so as to select a working mode. The control box is used for completing setting of the system working mode and parameter setting by the flight personnel according to setting permission of opening working modes and parameters of the system and aircraft flight state provided by the transceiver host. The omnidirectional antenna is used for receiving an interrogation signal sent by a ground secondary radar. According to the system, the human operation authority is minimized; for the necessary manual operations, an error-proof operation and anti-error operation design is made for avoiding the false operation and the violation operation, so that the equipment and system failures caused by human factors are reduced effectively and the system redundancy is improved substantially and thus the continuous and effective ground monitoring is supported.

The invention relates to a sub-threshold single-cycle clock frequency reduction control circuit. The control circuit comprises two input ports; one output port, the input end port inputs a clock signal and an input pulse signal respectively; and the output port outputs the clock down-conversion signal after frequency reduction, and based on the sub-threshold single-cycle clock down-conversion control circuit provided by the invention, the clock down-conversion signal after frequency reduction is output by controlling the level states of the input pulse signal and the clock signal, so that single-cycle clock down-conversion control is realized. The sub-threshold single-cycle clock frequency reduction control circuit provided by the invention is simple in control signal and suitable for being applied to fault-tolerant design, error correction control and circuits with single-cycle clock frequency reduction requirements.