45results about How to "In line with the actual operating conditions" patented technology

The invention discloses a method for identifying parameters of synchronous wind-driven generators on the basis of an improved particle swarm optimization algorithm. The method has the advantages that selection genetic operation, crossover genetic operation and mutation genetic operation are carried out on the basis of the particle swarm optimization algorithm, so that the global search capacity and the local search capacity of the particle swarm algorithm can be improved, and the convergence speed of the particle swarm algorithm can be increased; measured data are directly acquired via a control center, so that the parameters of the synchronous wind-driven generators can be identified in an online manner, an existing method for identifying parameters of wind-driven generators in an offline manner under the condition of machine halt is changed, and normal running of the synchronous wind-driven generators is unaffected; the identified parameters effectively conform to actual running conditions of the synchronous wind-driven generators, and accordingly steady states, dynamic states and transient characteristics of the synchronous wind-driven generators can be effectively reflected.

The invention discloses an air conditioner heating operation control method. The method comprises the steps that the actual heating capacity of air conditioner operation and the actual temperature change of a room where an air conditioner is located in a set time period are obtained; the reference temperature change corresponding to the actual heating capacity is determined according to the actual heating capacity; a target parameter is determined according to the comparison result between the actual temperature change and the reference temperature change corresponding to the actual heating capacity, and the air conditioner is controlled to operate according to the target parameter; and the actual heating capacity is determined according to real-time compressor frequency, the real-time indoor temperature, the real-time outdoor temperature, the real-time indoor unit rotation speed, the real-time outdoor unit rotation speed and the real-time operation power. By the application of the air conditioner heating operation control method, control performance of the air conditioner can be improved.

The invention discloses a cophase power supply system flow controller dynamic reliability evaluating method. The influence of the actual traction load randomness and impact on the junction temperature fluctuation of a power element is taken into account. Power loss and a thermal network model are used to calculate the junction temperature of the power element. A physical model based on a failure mechanism and a linear fatigue damage cumulative model are combined to calculate the power module failure rate of a flow controller. The PFC reliability is analyzed by using a dynamic reliability assessment method which takes into account the variation of the element failure rate. According to the invention, the redundancy of a power module is analyzed; the number of cascaded modules of the flow controller is optimized; and a necessary basis is provided for engineering design and operation maintenance of a cophase power supply system.

The invention provides a database fault discovery method and device, electronic equipment and a storage medium. The method comprises the steps of determining a target threshold according to the targetdata set and the probability distribution characteristic function corresponding to each piece of target data in the target data set, wherein the target data areused for representing the historical usage rate of the storage device of the target database in a historical preset duration; if it is determined that the target to-be-tested data is abnormal data according to the target threshold, judgingwhether other target to-be-tested data in the abnormal time window is abnormal data, and if yes, determining that the target database fails; determining the target threshold based on each historicalusage rate and the corresponding probability distribution characteristic function, so that the reasonability and precision of the target threshold are effectively improved. And an abnormal time windowis introduced, so that the fault discovery process is strongly associated with the actual operation periodicity of the target database, and the fault discovery rationality is further improved. The method does not need to consider business diversity to construct a corresponding model, and has the advantages of strong realizability and high utilization rate.

The invention discloses an elastic side bearing fatigue test device. The elastic side bearing fatigue test device comprises a side bearing seat, a base composition, a horizontally arranged connecting beam, a horizontal loading device and a vertical loading device, wherein the side bearing seat is used for placing a side bearing; the base composition is provided with a supporting table which supports the side bearing; one end of the connecting beam is fixedly connected to the side bearing while the other end of the connecting arm is hinged to a positioning pin; the positioning pin is fixedly arranged a positioning pin boss which is far from the base composition at a certain distance; the horizontal loading device is used for applying a horizontal load to the side bearing; and the vertical loading device is arranged on a side bearing wearing plate of the elastic side bearing for applying a vertical load to the elastic side bearing. According to the elastic side bearing fatigue test device and method, the actual applying work condition of the elastic side bearing can be simulated, so that the reliability of an elastic side bearing fatigue test result is improved.

The present invention discloses a method for detecting the refrigerating energy efficiency ratio of an air conditioner online and a method for detecting the refrigerating capacity of the air conditioner online. The method for detecting the refrigerating energy efficiency ratio of the air conditioner online includes the following steps that: in the operation process of the air conditioner, real-time compressor frequency, real-time indoor temperature, real-time outdoor temperature, real-time internal unit rotation speed and real-time external unit rotation speed are obtained; a real-time core energy efficiency ratio corresponding to the real-time compressor frequency and the real-time outdoor temperature is determined according to a typical compressor frequency, a typical outdoor temperature, a typical core energy efficiency ratio and a typical relation expression; a real-time indoor temperature energy efficiency ratio correction factor is determined according to the real-time indoor temperature and rated indoor temperature, a real-time internal unit rotation speed energy efficiency ratio correction factor is determined according to real-time internal unit rotation speed and rated internal unit rotation speed, and a real-time external unit rotation speed energy efficiency correction factor is determined according to the real-time external unit rotation speed and rated external unit rotation speed; and a real-time refrigerating energy efficiency ratio is determined according to the real-time core energy efficiency ratio and the energy efficiency correction factors. With the methods of the invention adopted, the refrigerating energy efficiency ratio and refrigerating capacity of the air conditioner under different working conditions can be detected in real time.

A method for predicting a gasoline engine spark advance angle based on the gray system theory belongs to the technical field of the control of an engine spark advance angle. The method comprises the following steps: regularly and continuously sampling cooling water temperature T (0) (k) of the petrol engine, inlet temperature t (0) (k) of the gasoline engine, rotating speed n (0) (k) of the throttle percentage gasoline engine, and air-fuel ratio lambda (0) (k) of the gasoline engine under a continuous working condition; taking initialized spark advance angle Beta' (0) (k) as a reference sequence of grey association analysis; carrying out one-step gray accumulating generation on the spark advance angle Beta (0) (k) to obtain gray one-step accumulating generation sequence Beta (1) (k) of the spark advance angle Beta (0) (k); and building gray single-argument first-order predicting models of all gasoline engine factor sequences influencing the spark advance angle. By adopting the gray system theory, the optimum spark advance angle can be actively predicted; and the storage space can be saved and the precision and the efficiency of the work of the spark control system can be improved by taking the advantages of little prediction data quantity and high short-term prediction accuracy of the grey system.

The invention provides a credibility evaluation method for a complex simulation system based on task orientation. The credibility evaluation method comprises the following steps of carrying out pre-analysis on the complex simulation system; for a simulation task to be executed by a complex simulation system, segmenting the simulation task into a plurality of sub-tasks according to different stagesof an execution process, constructing an information network corresponding to each sub-task, and superposing the information networks according to a time sequence to form a system cooperative network; converting and mapping the system cooperative network into a credibility index network of the complex simulation system, and calculating a credibility conduction coefficient between nodes accordingto the comprehensive credibility of cooperative operation of every two adjacent nodes and the credibility of a single node; and forming a credibility conduction chain according to the credibility conduction coefficient in the index network and the credibility of a single node and a time sequence, and deducing to obtain the final credibility. The invention provides an implementation method for credibility evaluation of a complex simulation system, and provides technical support for evaluation and optimization improvement of the complex simulation system in the fields of aviation, spaceflight, military affairs, traffic and the like.

The invention provides an equipment fault alarm method and device, and belongs to the field of equipment fault alarm. The method comprises the following steps: acquiring a vibration signal of to-be-tested equipment, and calculating the statistical magnitude of the vibration signal; monitoring the operation condition of the to-be-tested equipment, and comparing the statistical magnitude of the vibration signal with an alarm threshold corresponding to the current operation condition if the operation condition is not changed; if the operation condition changes, recalculating an alarm threshold value, comparing the statistical magnitude of the vibration signal with the alarm threshold value corresponding to the changed operation condition, and determining whether to generate an alarm signal ornot according to a comparison result, wherein the alarm threshold value corresponds to the operation condition of the to-be-tested equipment, calculating the statistical magnitude of the vibration signals of the to-be-tested equipment in a time window under a certain operation condition, and determining the alarm threshold value of the operation condition according to the statistical magnitude ofthe vibration signals of the to-be-tested equipment in the time window. The method can adapt to various operation working conditions, and the fault alarm accuracy of equipment with complex working conditions is improved.

The invention discloses a full-automatic recloser type feeder automation function testing device. The full-automatic recloser type feeder automation function testing device comprises a current outputunit, a voltage output unit, a switch state unit, a control unit and a wiring terminal; the current output unit, the voltage output unit, the switch state unit and the control unit are all located inside the device, and the wiring terminal is located outside the device. According to the invention, the actual operation condition can be simulated, and the switch state, telemetry acquisition and terminal strategy action are organically combined. The device is small in size and convenient to carry, and can simultaneously meet laboratory and field test requirements. The device only needs one current source to satisfy synchronous simulation of a current fault state and a normal state, and is flexible in output and low in cost. The device organically combines the voltage, the current and the switch state, can simulate the fault condition of each terminal in the actual distribution network fault state, and is more real in simulation.

The invention discloses a direct current supporting capacitor testing device for outputting alternating current and direct current composite voltage. The device comprises an alternating current voltage output module and a direct current voltage output module; the alternating current voltage output module and the direct current voltage output module are connected in parallel to form a parallel port; one end of the parallel port is connected with a direct current supporting capacitor to be tested, and the other end of the parallel port is grounded; the alternating current voltage output module is used for outputting alternating voltage with adjustable amplitude and frequency; and the direct current voltage output module is used for outputting direct current voltage with adjustable amplitudeand boosting rate. The direct current supporting capacitor testing device can output alternating current and direct current composite voltage, can also output single direct current or alternating current voltage, and accords with the actual operation working condition of the direct current support capacitor; and meanwhile, the amplitude and the frequency of the output alternating current voltage can be adjusted, and the amplitude and the boosting rate of the direct current voltage can also be adjusted, so that the performance parameters of the capacitor which are as close to the actual engineering as possible are obtained, and the reliability of the testing performance of the direct current supporting capacitor is improved.

The invention discloses a method applied to fusion reactor cladding accurate engineering design. The method comprises the following steps: firstly, performing plasma calculation to obtain anisotropicneutron source distribution and cladding first wall surface heat flux density distribution; combining anisotropic neutron source distribution obtained through plasma calculation in neutron transport physics calculation with material temperature distribution obtained through thermohydraulics calculation, and obtaining cladding core heat source distribution and cladding tritium propagation rate; obtaining material temperature distribution of different areas in the cladding by utilizing cladding first wall surface heat flux density distribution provided by plasma calculation and nuclear heat source distribution provided by neutron transport calculation in thermal hydraulics calculation; neutron transport calculation and thermal hydraulics calculation needing to be mutually iterated until therequirements of material temperature safe operation limitation and cladding tritium propagation rate are met. According to the method, engineering design can be carried out on the fusion reactor cladding in the real service environment of the cladding, the defect that in a traditional method, an isotropic neutron source and the surface heat flux of the first wall of the uniform cladding are adopted is overcome, and accurate engineering design of the cladding is achieved.

The invention provides a method and a system for detecting a dynamic lift range of a gag bit of a common-rail oil injector and relates to the technical field of monitoring. The method comprises the following steps: S1) driving a displacement sensor and a detecting needle to detect an end face of the gag bit of a detected common-rail oil injector by controlling the motion of a driving device through an industrial personal computer; S2) controlling a sensing device to stop running by the industrial personal computer according to a trigger signal sent by the displacement sensor while sending a preset pulse width to an ECU (Electronic Control Unit) by the industrial personal computer, and controlling a high-low pressure driver to electrify the detected common-rail oil injector by the ECU according to the preset pulse width, when the end face of the gag bit is detected by the detecting needle; S3) collecting the displacement of the detected common-rail oil injector in real time by the displacement sensor according to a contact measuring mode of the detecting needle; S4) acquiring the lift range of the gag bit by the industrial personal computer according to the displacement, thereby finishing the detection. According to the method provided by the invention, the detection is performed under a dynamic state, so that the practical running working condition of the gag bit is met and the accuracy is high; the accuracy is higher due to the contact type detection of the detecting needle; the repeated detecting precision is high.

The invention discloses an inversion device and a power control method thereof. The inversion device comprises a shell, a power module and a heat dissipation structure, the power module is arranged inthe shell and comprises a boosting power switch tube and an inversion power switch tube; the heat dissipation structure is arranged in the shell and comprises a draught fan, a boosting radiator and an inversion radiator; the draught fan supplies air in the first direction, and the boosting radiator and the inversion radiator are both arranged on the air outlet side of the fan and used for radiating heat for the boosting power switch tube and the inversion power switch tube respectively. The projections of the boosting radiator and the inversion radiator along the first direction are at leastpartially overlapped, and the boosting radiator is arranged closer to the fan than the inversion radiator along the air supply direction of the fan. According to the inversion device, the air supply air flow passing through the boosting radiator can still dissipate heat of the inversion radiator, and the inversion device can meet the larger heat dissipation requirement of an inversion power switchtube.

The invention discloses a dynamic early warning method for the growing of the dirt of a reclaimed water heat exchanger, and the method comprises three parts: 1, carrying out the fitting of a heat transfer criterion equation of two sides of the heat exchanger in a clean state through data sampling; 2, carrying out the plotting of a dirt thermal resistance increase characteristic curve through the collection of the data of the reclaimed water heat exchanger in one operation period, and building a dirt thermal resistance increase mathematical model; 3, carrying out the dirt growing early warning of the next period through employing the dirt thermal resistance increase characteristic curve and the dirt thermal resistance increase mathematical model, which are obtained in a former period, and carrying out online updating. The method can achieve the early warning of the growing of dirt, can achieve the online updating, provides decision making basis for the operation and maintenance of the heat exchanger through the early warning of the growing of dirt in the next period, and can enable the reclaimed water heat exchanger to operate in an energy-saving and efficient manner.

The invention discloses a method for formulating a vibration limit value of an aeronautical transmission system. The method comprises the following steps: 1) determining a life value of the aeronautical transmission system and an S-N curve of a material; 2) establishing a multi-flexible dynamic model of the aeronautical transmission system; 3) measuring vibration values of each shafting of the aeronautical transmission system under different working conditions and load conditions, and calculating dynamic stress and load of each shafting of the aeronautical transmission system along with time history; 4) compiling a load spectrum based on the load of each shafting of the aeronautical transmission system along with the time history; 5) calculating the service life of each shafting of the aeronautical transmission system under different working conditions and load conditions; 6) establishing a coupling relation between the vibration values and the service life of each shafting of the aeronautical transmission system under different working conditions and load conditions. According to the method for formulating the limit value through combination of simulation and tests, a large number of tests are avoided, and the cost of time, manpower, material resources and the like is saved.

The invention provides a nonuniform spraying device for a SCR cold-state mode experiment. The nonuniform spraying device is arranged in a flue gas and comprises multiple spraying subunits of a same structure, and each spraying subunit comprises a NOx / tracer gas diluting air inlet pipe, a support pipe communicated with the NOx / tracer gas diluting air inlet pipe, multiple nozzles arranged on the support pipe and a static mixing pipe arranged at a spout of each nozzle. The device can realize nonuniform spraying of NOx / tracer gas in the SCR cold-state mode experiment, so that experiment parameters are ensured to better meet actual running conditions, and accuracy and reliability of the cold mode experiment are improved. The invention further provides a spraying method based on the device.

The embodiment of the invention provides a servo load moment calculation method and equipment applied to an aircraft and a storage medium. The method comprises the steps of: acquiring a static load parameter of an air rudder in the aircraft, and determining a static load of the air rudder according to the static load parameter; acquiring a dynamic load parameter of the air rudder, and determininga dynamic load of the air rudder according to the dynamic load parameter; and determining a servo load moment of an aircraft servo system according to the static load and the dynamic load. According to the servo load moment calculation method and equipment applied to the aircraft and the storage medium provided by the embodiment of the invention, the control precision of the servo system can be improved.

The invention discloses a calculation method for calculating the available capacity of a wind power plant, and belongs to the field of electric power system planning and design. The calculation method mainly comprises the following steps: selecting sample data and performing data preprocessing; carrying out statistical calculation on the active power output probability of each power output segment within a certain time scale; fitting a continuous function curve of each function model based on various function models with a maximum likelihood estimation or least square fitting method; and evaluating the goodness of fit of the fitted curves with a goodness of fit evaluation index, selecting an optimal fitting model, and performing generalization performance examination. As proved by a result, a model established by the method has high generalization performance, and the calculated available capacity curve accuracy of the wind power plant is high.

The invention discloses an optical fiber differential protection field simulation test system and method based on a Beidou system. The system consists of a line local side test unit and an opposite side test unit, and each test unit internally comprises a Beidou communication module, a data simulation module and a data interface module. The Beidou communication module receives a satellite time tick message to realize clock synchronization, and interacts test control information and a test result with the opposite side test unit through a short message; the data simulation module simulates testvirtual data required by a protection device according to the input system operation parameters; and the data interface module outputs test sampling analog quantity and switch position information tothe protection device and collects tripping information output by the protection device at the same time. According to the invention, the problem that there is no systematic debugging technology of line optical fiber differential protection in a transformer substation site at present can be solved to meet the requirements of power system users for field detection of line protection devices.

The invention relates to a multi-step prediction method for ultra-supercritical boiler heating surface pipe wall overtemperature early warning, which comprises the following steps: step 1, collectingtraining data in a training stage, preprocessing the collected training data, then constructing a time sequence network model, and carrying out offline training; and step 2, acquiring input data as input of the time sequence network model in a use stage to obtain a prediction result of the metal wall temperature data. The method has the beneficial effects that the pipe wall temperature of the heating surface can be predicted in advance, and guidance is provided for over-temperature control; longer time sequence feature information can be captured, and the prediction precision is improved; timeis subjected to sinusoidal encoding, so that transition of each day is smooth, and the actual operation condition is better met; the problem that the sensor cannot work for a long time due to directmeasurement can be solved, and wall temperature prediction at different positions can be realized; latest data can be conveniently added, the model is retrained, and good anti-interference performanceis achieved.

An online detection method for a refrigeration energy efficiency ratio and a refrigeration capacity of an air conditioner. The online detection method for a refrigeration energy efficiency ratio comprises: during the operational process of an air conditioner, acquiring a real-time compressor frequency, a real-time indoor temperature, a real-time outdoor temperature, a real-time inner machine rotation speed and a real-time outer machine rotation speed; determining a real-time core energy efficiency ratio corresponding to the real-time compressor frequency and the real-time indoor temperature according to a typical compressor frequency, a typical outdoor temperature, a typical core energy efficiency ratio and a typical relational expression; determining a real-time indoor temperature energy efficiency ratio correction factor according to the real-time indoor temperature and a rated indoor temperature, determining a real-time inner machine rotation speed energy efficiency ratio correction factor according to the real-time inner machine rotation speed and a rated inner machine rotation speed, and determining a real-time outer machine rotation speed energy efficiency ratio correction factor according to the real-time outer machine rotation speed and a rated outer machine rotation speed; and determining a real-time refrigeration energy efficiency ratio according to the real-time core energy efficiency ratio and each energy efficiency ratio correction factor. Thus, the real-time detection of a refrigeration energy efficiency ratio and a refrigeration capacity under different operational working conditions of an air conditioner can be achieved.

The invention discloses a partial discharge test system for a basin-type insulator epoxy insulating material, and the system comprises a test cavity which is internally provided with a ground electrode, and the ground electrode is internally provided with a heating device which is used for directly heating the ground electrode and indirectly heating the basin-type insulator epoxy insulating material and filling gas in the test cavity. A gradient temperature environment is formed by the ground electrode, the basin-type insulator epoxy insulating material and the filling gas; a high-voltage electrode is further arranged in the test cavity, one end of the high-voltage electrode is externally connected with a power source, the other end of the high-voltage electrode is connected with a basin-type insulator epoxy insulating material arranged on the ground electrode, and the high-voltage electrode and the ground electrode form an electrode assembly which is used for carrying out a partial discharge test on the basin-type insulator epoxy insulating material in a gradient temperature environment.