32 results about "Common mode failure" patented technology

An electrically actuated braking system for an aircraft, comprising: an electro-mechanical brake actuator (EMAbrake) proximate a wheel of the aircraft, the EMAbrake including a motor; an electro-mechanical actuator controller (EMAC) including a first motor controller for generating a first drive signal for the EMAbrake, and a second motor controller for generating a second drive signal for the EMAbrake, wherein the first motor controller and the second motor controller are dissimilar so as to provide protection against common mode failure of the first and second motor controllers.

An electrically actuated braking system for an aircraft, including: an electro-mechanical brake actuator (EMAbrake) proximate a wheel of the aircraft, the EMAbrake including a motor; an electro-mechanical actuator controller (EMAC) including a first motor controller for generating a first drive signal for the EMAbrake, and a second motor controller for generating a second drive signal for the EMAbrake, wherein the first motor controller and the second motor controller are dissimilar so as to provide protection against common mode failure of the first and second motor controllers.

The invention relates to a method and system for improving reliability of emergency power supplies of a nuclear power plant. At least one path of high-capacity battery energy storage system (fixed energy storage system and / or movable energy storage system) is used to supplement or replace final emergency power supplies of a nuclear power plant. When all existing emergency power supplies of the nuclear power plant fail, the system is started to supply power for equipment in an emergency plant of the nuclear power plant so as to keep discharging waste heat of reactor cores and cooling spent fuel pools of the nuclear power plant, thus ensuring the safety of the nuclear power station. The method and system provided by the invention can be used for resisting against extreme weathers and avoiding common mode failure of the emergency power supplies in the extreme weathers, can strength the reliability of the emergency power supplies of the nuclear power plant and can at least reduce the melting probability of reactor cores by 21.6%, thereby improving the integral nuclear safety level of the nuclear power plant.

The invention discloses a flooded subzone partitioning system for a nuclear power plant. The system is characterized by comprising a flooded subzone preliminary partitioning module, a flooded water level calculating module and a flooded subzone determining and optimizing module, wherein the flooded subzone preliminary partitioning module is used for preliminarily carrying out flooded subzone partitioning on an area of the nuclear power plant according to distribution conditions of flooding sources and important devices in the area of the nuclear power plant; the flooded water level calculating module is connected with the flooded subzone preliminary partitioning module and is used for calculating a flooded water level of each flooded subzone; and the flooded subzone determining and optimizing module is connected with the flooded water level calculating module and is used for determining existing subzones or optimizing and adjusting flooded subzones according to influence on the important devices in corresponding subzones caused by flooded water levels. According to the system, devices and components of different safe series, which execute the same safety function, are effectively isolated, and common-mode failure of different series devices, which execute some safety function, caused by flooding of the same time is avoided. In addition, the invention further discloses a flooded subzone partitioning method for the nuclear power plant.

The present invention belongs to the field of Internet, and particularly relates to a reliability evaluation method used for a multiple fault mode cloud computing platform. The present invention aims to establish a reliability evaluation method for the multiple fault mode cloud computing platform based on an expanding form multivalued decision diagram of a BDD so as to allow synchronous modeling and analysis in multiple fault modes and improve the accuracy and the efficiency of the reliability analysis. The reliability evaluation method is implemented by the following technical scheme: the reliability evaluation method used for the multiple fault mode cloud computing platform comprises the following steps of: S1, multiple fault mode MDD modeling; S2, system MDD model construction; and S3: reliability evaluation based on MDD. For each fault mode of a common mode fault, a propagation fault and a component fault, a non-overlapping event space is established based on a logical combination among faults or a state space of a component, and the MDD model for each fault mode is constructed according to the non-overlapping event space.