286results about How to "Meet reliability requirements" patented technology

A hydropower station set LCU active pulse adjusting system disclosed by the present invention comprises a module of obtaining a set active target value, a module of obtaining a power adjusting mode, a module of obtaining opening mode initial values by an interpolation algorithm, a module of obtaining an adjustment pulse width by a modified proportional algorithm and a set active monitoring module. According to the present invention, and according to the head change, the interpolation algorithm is used to calculate the opening mode initial values comprising a set active current value, an adjustment target value, an adjustment dead zone value and a pulse adjustment proportion coefficient K value, and the modified proportional algorithm is used to calculate a power pulse width. The hydropower station set LCU active power pulse adjusting system is provided for the first time, and satisfies the set active adjustment rapid stability and reliability requirements of a large-scale hydropower station monitoring system.

The invention provides a transformer substation communication network state online monitoring system and method. The monitoring system comprises a state managing area, a state monitoring area and a state judging area. A communication network flow failure action threshold value is set and calculated through the state managing area; exchange messages at all ports of all exchangers are mirrored to the monitoring system in real time through the state monitoring area, the messages, devices and network performance are monitored in real time, the network measured flow is inputted to the state judging area, and meanwhile the message analysis content is conveyed to the state judging area; initial failure judgment is conducted through the state judging area according to the monitoring message time sequence and the message coding reasonability, the network measured flow and the network flow failure action threshold value are compared, and network failures are positioned, controlled and recovered. The transformer substation communication network state online monitoring system and method have the advantages that the online monitoring capacity and the real-time protection capacity are achieved, and the requirement of an intelligent transformer substation for the reliability of a communication network can be met.

The invention relates to a method for evading co-channel interference through deflection antenna pointing and a satellite communication system. The method comprises the following steps: arranging morethan one space-borne antenna on an NGEO communication satellite; determining a constellation configuration of the NGEO satellite communication system, and ground user type and distribution, and selecting variables to describe the normal orientation of the space-borne antenna of the NGEO satellite communication system; according to an interference protection regulation for the GEO satellite systemof ITU, selecting a group of indexes alpha for balancing the interference degree of the satellite communication system to the GEO satellite system; determining a group of indexes beta for balancing link quality of the satellite communication system; establishing a nonlinear optimization model of the normal orientation of the phased array antenna according to the indexes alpha and the indexes beta; and solving optimal variables through iterations and outputting a set of optimal phased array antenna deflection pointing setting scheme. The method for evading co-channel interference through deflection antenna pointing and the satellite communication system in the present invention ensure own communication link quality and reliability requirements, so that the satellite system can coexist effectively with the GEO satellite system at the same frequency.

The invention relates to a current measuring device based on combined PCB type Rogowski coils and a method thereof. The device comprises one or more pairs of PCB type Rogowski coils, an amplifier circuit unit, an integral circuit unit and a sampling circuit unit. One or more pairs of PCB Rogowski coils orderly are connected in series. The directions of current flow in the winding wires of any two adjacent PCB Rogowski coils are opposite. Through holes in the PCB Rogowski coils pass through conductors with the conduction of current, and differential voltage signals are measured. The one or more pairs of PCB type Rogowski coils in series connection are electrically connected to the amplifier circuit unit. The amplifier circuit unit amplifies and outputs the differential voltage signals. The integral circuit unit integrates the amplified differential voltage signals to obtain reducing voltage signals which are proportional to the measured current in the conductors with the conduction of current. The sampling circuit unit samples the reducing voltage signals. The device and the method have the advantages of good parameter consistence and high reproducibility, and stability of a mutual inductance coefficient is ensured.

The invention discloses a variable-step self-adaptive echo interference cancellation method based on preliminary channel estimation, which comprises a preliminary channel estimation process based on correlation detection, a channel tracking process based on a variable-step self-adaptive algorithm and an echo cancellation process, wherein the initial characteristic parameters of the echo channel are acquired in the preliminary channel estimation process; the precise channel tracking process is completed according to the channel characteristic parameters acquired by the channel preliminary estimation process; and the extraction of useful signals is completed in the echo cancellation process. The invention is suitable for processing the problems of channel estimation, channel identification,channel tracking and echo interference cancellation in time-invariant channels and time-variant channels. The method can quickly capture the characteristics of the echo channel, track the variation process of the channel in real time, and accurately restore the signals submerged in echo interference noise in real time.

The invention provides a cache cluster-based cache method. The method comprises the following steps: determining a subarea number of a cache subarea corresponding to to-be-written data by a cache client; querying information of a main node of the cache subarea corresponding to the to-be-written data from a view service node according to the subarea number; receiving the information, returned by the view service node, of the main node of the cache subarea corresponding to the to-be-written data, and sending a write request to the main node of the cache subarea corresponding to the to-be-written data according to the main node information, wherein the write request carries the to-be-written data; writing the to-be-written data into a local write-back cache by the main node of the cache subarea corresponding to the to-be-written data according to the write request; and acquiring information of standby nodes of the cache subarea corresponding to the to-be-written data from the view service node, and copying the to-be-written data into the standby nodes of the cache subarea corresponding to the to-be-written data. The method is capable of enhancing the reliability of cache-scale clusters.

The invention discloses an iron phosphate lithium battery power supply management system used for service robots and a working method. The system comprises a iron phosphate lithium battery set, and the iron phosphate lithium battery set is connected with a lithium battery hardware protection circuit. The input end of the lithium battery hardware protection circuit is connected with a charging interface, and the output end of the lithium battery hardware protection circuit is connected with a power supply input interface. The power supply input interface is connected with a power loop and a control loop respectively through a main switch. The output end of the lithium battery hardware protection circuit is connected with a power supplying power supply of an electric quantity measurement and display circuit, and the power supplying power supply of the electric quantity measurement and display circuit supplies power for the electric quantity measurement and display circuit. The electric quantity measurement and display circuit comprises an STM32 chip, wherein the STM32 chip conducts battery remaining power percentage SOC estimation in a mode of combining an ampere-hour integral method and an open circuit voltage method. By means of the system, the power supplies of the service robots can be managed, stable work of an iron lithium battery set is guaranteed, the battery set information is obtained in real time, and the system has the function of power supply expansion.

The invention discloses a 12-cylinder water cooling diesel engine. The engine comprises a crank connecting rod mechanism arranged on a fixed part, a gas distribution mechanism, a transmission mechanism, a cooling system, a lubricating system, a fuel supply system, an intake/exhaust system, an electric system and a starting mechanism. The water cooling engine widens the power range, increases the power from traditional 195-499 kW to 780 kW, preferably exerts the characteristics of high power, small size, compact structure and low fuel consumption of the series of diesel engines, adapts to the market demands, satisfies the use requirements of users, is better in market competitiveness, can be applied to such fields as engineering machinery and generator sets, and widens the application field of 132-series engines.

The invention relates to a city government hotline data integration platform comprising a unified basic support platform and the service application system of each data source department. The unified basic support platform comprises a basic facility layer, a data resource layer, an application support layer and an application service layer which are arranged from the bottom to the top in turn. The data resource layer acquires the data of all the data source departments. The application support layer performs basic arrangement on the data and acquires the basic data of the data resource layer and then performs the basic service and is used for providing service support to the application service layer. The service application systems establish information interaction channels with the application service layer and realize the application service for the data source departments. Various government affair service hotlines are integrated based on the mayor's open telephone, and the public service hotlines with integration of consulting, service, assistance, supervision and complaint, public opinion analysis and coordinated supervision are established so that various non-urgent appeals of the people put forward to the government apart from urgent alarm are received in a unified way.

The invention discloses a transformer maintenance decision method for optimizing reliability and economy. The transformer maintenance decision method comprises the following steps: (1) establishing a failure rate function and a reliability function considering preventive maintenance; (2) determining the maximum maintenance period of a transformer so that the transformer meets certain reliability; (3) performing regular preventive maintenance on the transformer in the maximum maintenance period, and performing optimization solution on the optimal preventive maintenance period by using maintenance cost minimality as a target function; and (4) determining the maintenance priority of transformer components through quantitative analysis of failure mode of internal parts of the transformers so that the maintenance schedule is more definite. The transformer maintenance decision method can solve the disadvantage that the decision of the preventive maintenance period of the transformer has no regard for the reliability change of the transformer and the influence on the system, and the maintenance of the transformer is optimized in the two aspects of reliability and economy.

The invention discloses a broadband low-current measurement device based on an isolated PCB-type Rogowski coil. The measurement device comprises the isolated PCB-type Rogowski coil, an integral circuit, an amplifying circuit and a signal receiving device. The integral circuit is a current mode integral unit achieved through a transconductance amplifier. According to the broadband low-current measurement device, measurement of power-frequency or high-frequency high-precision low currents can be achieved, the measurement bandwidth can reach 50-20KHz, the measurement precision can reach 0.5A, and defects of a conventional Rogowski coil in low current measurement are eliminated. According to the broadband low-current measurement device, the isolated PCB-type Rogowski coil serves as a sensing head, the broadband low-current measurement device has the advantages of being easy to install, low in weight, easy to manufacture and the like, and by means of the current mode integral unit achieved through the transconductance amplifier, errors can be effectively reduced and the bandwidth is increased.

The invention discloses a multi-terminal flexible direct-current power distribution network-oriented protection method based on the voltages of current-limiting inductors. The method comprises the steps of fault starting, fault detection, fault identification and fault pole selection. According to the fault starting, du/dt and di/dt are adopted as criteria. According to the fault detection, low-voltage and over-current protection is adopted to detect whether a line fails or not. According to the fault identification, internal and external faults can be reliably identified on the basis of the voltages of the current-limiting inductors at two ends of a direct-current line. According to the fault pole selection, whether a positive pole, a negative pole or a bipolar fault occurs in a system isdetermined on the basis of the voltages of the current-limiting inductors at two ends of the direct-current line. After a corresponding fault is detected, a tripping signal is sent out, a corresponding direct-current circuit breaker acts, and the fault is removed. With the method of the invention adopted, the problem that the quickness of a traditional direct-current power distribution network protection is poor is solved. Fault identification is carried out through the voltages at the two ends o of the current-limiting inductors.

The invention discloses a fault tolerance system and method of a server. The system comprises a server pool, a client and a pooling device, wherein the server pool comprises a plurality of servers; the client is used for accessing the server pool; the pooling device is used for managing the server pool composed of the plurality of the servers and carrying out real-time monitoring and collection on operation states of each server; if one server breaks down, the faulted server is immediately removed from the server pool, so as to assure that the servers in the server pool are normally operated; if the connection between parts of the clients and the faulted server is discontinuous due to the fault of the server, parts of the clients are redistributed by the pooling device and the next server operated normally is got; and in the fault tolerance system, the discontinuous connection and service can be smoothly taken over by the new server through a state sharing mechanism. According to the fault tolerance system and method of the server, provided by the invention, the fault tolerance performance of the server can be improved and the normal operation of the system is assured.

An embodiment of the invention discloses a ring network-based communication method. A ring network comprises a plurality of apparatuses; the apparatuses are physically connected mutually to form a single ring; each apparatus at least comprises two ports; and the ring network comprises a main line and a spare line which are in a communication state. The method comprises the following steps that: in each communication period of performing real-time communication, each apparatus of the apparatuses sends messages from the main line and the spare line according to a previously set sequence and receives the messages sent by other apparatuses; and when the messages which are mutually redundant and sent by the same apparatus, the equipment selects a message from the messages which are mutually redundant. In each communication period, all apparatuses redundantly send the messages according to an initially configured sequence so as to avoid message collision, avoid the influence of packet loss, error code and the like on the communication, and improve the determinacy and the stability of the communication of the ring network.

The present invention discloses an open tube HgTe source Te-Cd-Hg epitaxial material heat treatment method. The stable mercury steam pressure required for heat treatment is provided by adopting graphite box structure. Said graphite box also can be implemented by utilizing improved liquid-phase epitaxial graphite boat, and its open tube process provides a way for batch production of the part. The success rate of using said process to make hole conduction heat treatment can be up to 100%. The hole density of the material of 77K temp. can be arbitrarily regulated in the range of 5X10 to the power 15 to 5X10 to the power 16 cm (-3). At the same time, the dislocation of material surface in the course of heat treatment does not produce increment effect, and the material composition and appearance form can be better retained.

The invention provides an adaptive fault diagnosis method of an aircraft generator rectifier. State monitoring and fault detection of the aircraft generator rectifier are realized. The implementation contents of the method comprise the following steps: determining working modes of a diode of the aircraft generator rectifier; acquiring historical data of the diode of the aircraft generator rectifier under various working modes; training by using the historical data; establishing classifiers for various working modes of the diode of the aircraft generator rectifier on the basis of a stumps method; changing weights of the different classifiers by using an adaptive method to generate an integral binary classifier; finally introducing an active learning mechanism by using a Generalized Bradley-Terry model to form a multi-classifier. The method is integrated in FADEC (Full Authority Digital Engine Control) of an aircraft engine, so fault monitoring of the generator rectifier can be realized, the accuracy and the efficiency for fault diagnosis of the aircraft generator rectifier are improved, and connection can be automatically cut off by the system when a fault of the rectifier occurs to prevent damage from being caused to subordinate equipment.

The invention discloses an electric power communication service routing assignment method based on service importance. The method comprises the following steps of: S1, performing network simplification for an electric power communication routing network, setting a source node and a target node, seeking K paths according to different circuit transmission paths, and setting corresponding importance for each path, wherein K is not less than 1; S2, obtaining a logic mapping matrix G and a threshold value TH according to an electric power communication routing network reliability analysis model; S3, seeking a complete set CS and a touch set TS according to the logic mapping matrix G and the threshold value TH; S4, substituting node reliability with service node risk degree, meanwhile, substituting edge reliability with service path risk degree, finally, calculating a numerical value of reliability, and thereby obtaining an optimal path of the electric power communication routing network.

The invention provides a liquid cooling rack of a miniature array device. Flow dividers are connected with an external cooling liquid source through self-sealing bayonet liquid connectors. Main flow channels of the flow dividers are provided with branch flow channels for dividing cooling liquid to module cold plates and power cold plates. The module cold plates are communicated with the flow dividers through blind insertion liquid connectors. A mounting space for a receiving and dispatching module is formed between the adjacent module cold plates. The two power cold plates are fixedly arranged above and below the integration of the module cold plates respectively. The power cold plates are connected with a digital processing module integrated liquid cooling structure through self-sealing blind insertion liquid connectors. The liquid cooling rack has the functions of complex flow channel organization, heat dissipation and force bearing; through a compact and ingenious structural layout and flow channel design, heat dissipation of the receiving and dispatching module with high heating flux density is achieved through limited liquid cooling resources; meanwhile, effective heat management of multiple functional modules with differentiated heat dissipation requirements is achieved, and the miniaturization requirement for platform loading is met.

The invention discloses an easy-to-maintain redox flow battery energy storage system. Redundant structures are both designed in a parallel connected string unit and a series connected single battery pack of the system, when in failure of single string and single battery which are put into operation, the standby single string and the single battery can be put into the operation without affecting the normal operation of the whole battery system and the battery string, and the maintenance is easy, thereby being in line with the requirements of high reliability of a power system on the battery of the energy storage system.

The invention provides an integrated integration electric car battery exchange system, comprising a battery exchange sub-system (1), an external sub-system (2) and an auxiliary sub-system (3), wherein the external sub-system (2) provides a power supply and a service object to the battery exchange sub-system (1); the auxiliary sub-system (3) is used for monitoring the battery exchange sub-system (1) in real time in an omnibearing manner; the temperature and the humidity of the battery exchange sub-system (1) are adjusted; fire control is provided. By adopting a manner of systematically classifying internal and external facilities of an electric car battery exchange station, the integrated integration electric car battery exchange system has the advantages of being clear in structure division, excellent in operating performance, modular in configuration, intelligent in function and the like, and clearly defines the modularization, distribution/intelligence of each part function.

The invention provides a thrust boosting system for an engine The thrust boosting system comprises a gel propellant accommodating device, an ejector, an igniter, a pipeline, a booster, a flow valve and a central processor, wherein the gel propellant accommodating device is used for accommodating a gel propellant; the ejector is arranged in the thrust boosting combustion chamber or the inner jet tube of the engine, and is used for ejecting the gel propellant; the igniter is arranged in the thrust boosting combustion chamber or the inner jet tube of the engine, and is used for igniting the gel propellant; the pipeline is in fluid communication with the gel propellant accommodating device and the ejector; the booster is coupled on the pipeline, and is used for boosting the gel propellant in the pipeline; the flow valve is coupled on the pipeline and is used for adjusting the flow of the gel propellant in the pipeline; the central processor is electrically connected with the booster and the flow valve, and is used for controlling the boosting value of the booster on the gel propellant and the aperture of the flow valve. According to the system and the method, thrust of the engine can be increased under the condition that an air compressor is not damaged, and the technical problem of instance increase of thrust under a special working condition of the engine is solved.