37results about How to "Short calculation cycle" patented technology

The invention provides a novel INS (inertial navigation system) / GPS (global position system) combined position and orientation method. The novel INS / GPS combined position and orientation method includes adopting a linear Kalman filter to perform filtering estimation to GPS original measurement data, and outputting optimal GPS navigation estimation value; according to the optimal position estimation value, providing initial position information to the INS, according to the optimal speed estimation value, providing initial speed information to the INS and solving INS initial measuring data to acquire INS navigation information; adopting a dynamic error model to establish a 9-order extended Kalman filter, integrating the INS navigation information with an optimal GPS navigation estimation value, performing feedback rectification to all INS navigation information at the same moment, and outputting optimal position data and orientation data after rectification and integration. The novel INS / GPS combined position and orientation method has such advantages as high precision, fast data processing speed and low hardware requirement and is applicable to low-cost INS / GPS combined position and orientation plan.

The invention discloses an optimization method of cycloid pin wheel profile modification based on particle swarm algorithm, and the method comprises the steps of determining a design variable and an object function according to a basic parameter of a cycloid wheel; re-determining a constrained condition according to a traditional constraint method and constraint requirements to a reshaped cycloid wheel tooth tip gap and a tooth root gap provided by the invention; playing the global optimization ability of particle swarm optimization algorithm in combination with the reshaped characteristics of the cycloid wheel to construct a particle swarm optimization algorithm model after the cycloid wheel shaping optimization; making an optimization object that the reshaped tooth profile can get close to a corner shaping tooth profile maximally and a return difference as small as possible is guaranteed, and further increasing the constraint requirement to the tooth tip gap and the tooth root gap on the basis of the traditional constraint, thereby obtaining a shaping tooth profile with an optimal equidistant and offset. In this way, the invention discloses the optimization method of cycloid needle wheel tooth profile modification based on the particle swarm algorithm with a short calculating period and high calculating precision, and the effect is good.

The embodiment of the invention provides a check value calculation method and a device of cyclic redundancy check. The method comprises the following steps: inputting the data packet which is equal to the first preset bit wide to a cyclic redundancy check calculation unit corresponding to the first preset bit wide for calculating check value when the data packet which is equal to the first presetbit wide in the data stream is received; and splitting the data packet which is less than the first preset bit wide into two or more data segments with different bit wide when the data packet which is less than the first preset bit wide in the data stream is received, and inputting the split data segments with different bit wide into the cyclic redundancy check calculation unit corresponding to the bit wide of the split data segments for calculating check value. The embodiment of the invention can effectively improve the efficiency of redundancy check value calculation, reduce the time to calculate the cyclic redundancy check value and can effectively satisfy the requirement of data transmission in high speed communication system.

The invention discloses a split jet aerator, which comprises the following parts: suction inlet, water nozzle, mixing tube, dispersing pipe, tail pipe and distributor, wherein the distributor connects the tail pipe; a cone with the action of deflecting the composite liquid and reducing the local resistance is set in the pipe segment with diffusing angle of tail pipe; the CFD company adopts artificial software value to optimize the design of the structure of jet aerator, which transmits the composite liquid of effluent-living sludge into water nozzle; certain vacuum is formed in the course of jet to form three-phased composite liquid of gas, liquid and solid, which enters into the dispersing pipe to form jet distributor with certain pressure to do inclined ejection to aerate oxygen and stir. The invention improves more dynamic efficiency and more oxygen utility than traditional one, which possesses larger suction quantity, higher bubble quality, evener stirring power and more energy saving.

The invention discloses a method for determining the position of an erosion line of a hearth of a blast furnace and belongs to the technical field of prolonging service life of the blast furnace. Compared with the prior art, the method for determining the erosion line of the hearth of the blast furnace has the advantages that the calculation amount is small, and accuracy is high. According to the method, a temperature field in a brick line of the hearth is directly calculated based on a steady-state heat conduction equation by a method for stabilizing a grid by using finite elements or finite difference; the heat conductivity coefficient of the brick lining is determined according to the temperature of grid nodes in iterative computation; if the temperature is more than 1,450 DEG C, the temperature field in the brick lining of the hearth is calculated and determined by using the effective heat conductivity coefficient of molten iron; the position of the position of the 1,150-DEG C erosion line is determined according to the temperature field; according to the method for determining the position of the erosion line, the temperature field is only needed to be calculated once; and compared with the conventional method, the method has the advantages that the calculation amount is greatly reduced, the calculation cycle is shortened, various requirements of operation of the blast furnace can be met, the calculation stability is greatly improved, and the division temperature of the molten iron and the brick line is set to be 1,450 DEG C, so that the actual requirement of the blast furnace can be met.

The invention provides a booster navigation and positioning solving method applicable to high-dynamic rolling reentry. The booster navigation and positioning solving method comprises the following steps: (1) establishing a high-dynamic attitude solving equation according to an optimized three-subsample equivalent rotating vector method; (2) establishing a speed and position navigation solving model of a boosting returning section according to the high-dynamic attitude solving equation established by step (1); (3) establishing an error model of an MEMS (Micro-electromechanical Systems) inertialdevice; identifying errors of the MEMS inertial device according to the speed and position navigation solving model of the boosting returning section of step (2) and boosting reentry actual measurement data, so as to obtain a revised MEMS inertial device output result; and (4) substituting the revised MEMS inertial device output result obtained by step (3) into the speed and position navigation solving model of the boosting returning section of step (2) to realize navigation and positioning solving of a boosting reentry process. The algorithm has the advantages of high solving precision, short calculation period, capability of being adaptive to large-attitude maneuvering and the like, and can provide accurate navigation position information for a booster reentry section.

The invention discloses an online blast furnace soft melting zone root position monitoring method. The method comprises the steps that the average density of heat flow passing through furnace linings is calculated by collecting the flow rate and temperature of cooling media in layers of cooling equipment of a blast furnace, the temperature difference between an inlet and an outlet, and other data; the average temperatures of the hot surfaces of all the layers of the furnace linings are calculated by analyzing the heat resistance of all parts between the cooling media and the hot surfaces of the furnace linings and combining the average heat flow density, the temperatures are used as the central point temperatures of the hot surfaces and subjected to interpolation or fitting, and thus, longitudinal temperature distribution of the heat surfaces of the blast furnace is obtained; the upper boundary temperature and the lower boundary temperature of a soft melting zone are calculated according to the phase composition of a to-be-smelted object, and the upper boundary position and the lower boundary position of the root of the soft melting zone can be determined by combining the longitudinal temperature distribution; and thus, online monitoring of the root position of the soft melting zone of the blast furnace can be achieved through online monitoring of the low rate and temperature of the cooling media, the temperature difference between the inlet and the outlet, and other data. The online blast furnace soft melting zone root position monitoring method has the advantages that timeliness is good, calculation is easy, and equipment investment is small; information including longitudinal temperature distribution of the heat surfaces of the furnace linings, the root position of the soft melting zone and the like can be monitored in real time; and theoretical direction is provided for optimized operation of the blast furnace and smooth production.

The invention discloses a transformer fault cumulative effect evaluation method based on a topological model of a power distribution network. The transformer fault cumulative effect evaluation method comprises the following steps of: depending on batch processing of a transient simulation program and a short-circuit current calculation program of simulation software PSD-BPA, completing a transformer cumulative effect evaluation function of the power distribution network by setting up a topological model of the power distribution network, calculating electric parameters and operation modes of the topological model of the power distribution network and the practical power distribution network, modifying the operation mode of a main network and a transient steady file, and setting up an end bus short-circuit fault simulation model of the power distribution network and a short-circuit calculation method; and, after the end bus of the power distribution network is failed, calculating short-circuit current flowing through a transformer via a transformer short-circuit fault current cumulative effect calculation model, superposing the short-circuit current with a cumulative effect initial value so as to obtain a transformer short-circuit fault current cumulative effect value, finally, outputting a result to perform graphical display, and performing evaluation. By means of the transformer fault cumulative effect evaluation method disclosed by the invention, condition early-warning and equipment overhaul preference strategies are provided for power distribution network equipment; and thus, the transformer fault cumulative effect evaluation method has good application prospects.

The invention discloses a rapid reconstruction method of a deformed antenna subreflector shape based on subreflector structure strain. The method comprises the following steps of determining the parameters of a main reflector, a subreflector and a back structure as well as operating frequency and material properties of a double-reflector antenna, and the distributional position and number of strain sensors; extracting the measured value of the strain sensors and setting up the finite element model of the antenna; determining a node at an antenna subreflector target point and a modal shape matrix corresponding to the node; determining a node at the strain sensor on the antenna subreflector and a strain modal shape matrix corresponding to the node; calculating the broad sense modal coordinate of the double-reflecting plane antenna; calculating the nodal displacement of an antenna subreflector target point; calculating the position of the antenna subreflector target point subjected to deformation according to the nodal displacement of the antenna subreflector target point and combined with the ideal position of the target pint, so as to rapidly reconstruct the subreflector shape of adeformed antenna. The method can be used for rapidly and effectively reconstructing the subreflector shape of the deformed antenna, and the double-reflecting plane antenna is conducive to meeting theindex requirement on electrical properties.

The invention discloses an optimization design method for uniform liquid distribution of a heat exchanger. The method comprises: simulating an air flow state in the heat exchanger and a refrigerant heat exchange state of each heat exchange pipe by using FLUENT software, obtaining the refrigerant heat exchange state of each heat exchange pipe, and obtaining a refrigerant heat exchange pressure drop of each heat exchange pipe according to the refrigerant heat exchange state of each heat exchange pipe; and according to the refrigerant heat exchange pressure drop of each heat exchange pipe, assuming that a resistance pressure drop required to be applied to a refrigerant by each liquid distribution capillary tube is reversely deduced when the refrigerant is reasonably utilized, and finally obtaining the required size of each liquid distribution capillary tube, wherein an obtained result is accurate. The method has the following advantages: (1) a working state of the heat exchanger is simulated by constructing a virtual model, so that the calculation cycle is short and the manpower and material resources are saved; and (2) the result can be obtained through computer operation, the operation is simple and convenient, the model is convenient to modify, and a complicated model can be adapted.

The invention provides a prepayment management system and an edge computing communication terminal. An edge computing communication terminal is arranged between an electric meter and a cloud background server; the edge computing communication terminal establishes a virtual ammeter data computing storage module with a unique number for each accessed ammeter; a cloud background server is replaced tocarry out degree reading and electric charge calculation on the electric meter; a common electric meter without a prepayment function can achieve the prepayment function, electric charge and prepayment balance calculation can be completed more quickly, electricity control can be conducted more quickly and timely, and it is guaranteed that important data and commands such as electricity price information, recharging data and an electricity control instruction are encrypted through an algorithm and are safely communicated through a wide area network. The problem of resource limitation caused bythe fact that a traditional background prepayment system needs server and network communication expansion due to increase of the number of ammeters is solved, and the ammeter access amount is increased. The prepayment function of an ammeter user is not influenced by cloud background server faults and communication network faults, the system reliability is high, and the data communication is safe.

The invention provides a time-saving and effort-saving method for calculating air intake volume of a front-end module of a car engine cabin. The instantaneous-condition air intake volume in a real car driving condition can be considered in an early design period. The method specifically comprises the steps of A, defining an air intake system of the front-end module of the engine cabin and dividing a front-end air intake channel of the whole engine cabin into a plurality of parts and paths according to flow characteristics; B, performing CFD flow field calculation on the engine cabin and calculating resistance of the parts and the paths of the air intake system of the front-end module of the engine cabin; C, defining resistance characteristics of the parts and the paths; D, establishing a balance calculation model of the air intake volume of the front-end module of the engine cabin by utilizing KULI software; E, determining an instantaneous condition of car running and inputting a defined complete car speed in the instantaneous condition into the calculation model in the step D; and F, reversely deriving the instantaneous-condition air intake volume of the front-end module according to the balance calculation model of the KULI software.

The invention discloses a fuel cell engine three-dimensional thermal management simulation method, and belongs to the technical field of fuel cell thermal management. The method comprises the following steps: establishing a fuel cell engine thermal management system, and respectively establishing three-dimensional fluid domain models of a large circulation system and a small circulation system; respectively establishing a plurality of common planes of the large circulation system and the small circulation system to obtain respective common node grids; discretizing the three-dimensional fluid domain models of the large circulation system and the small circulation system respectively; establishing a material layer thermal attribute model after discretization of the large circulation system and the small circulation system through Ansys Fluent software; establishing mathematical models of parts of the large circulation system and the small circulation system; and inputting boundary conditions of the parts so as to carry out simulation solution calculation. According to the simulation method, the analysis result is more intuitive and convenient, the thermal management system model is simplified, the calculation period is short, the simulation precision is high, and the flow resistance, the temperature change and the flow distribution can be effectively evaluated.

The invention provides a frequency acquisition method and a device of a single chip microcomputer, comprising the following steps: recording the capture counting difference between two capture eventsand the number of capture events; Calculating a time difference between two adjacent capture events according to the capture count difference; calculating A target frequency according to that time difference and the number of capture events. Thus the design calculation cycle is short and the calculation frequency is completed within the set time. The calculation precision is high, and the timer parameters can be adjusted automatically according to different frequencies, so that more accurate measurement can be realized.

The invention discloses an industrial process small sample fault diagnosis method based on deep optimal feature transmission, and the method comprises the steps: constructing a reduced source domain and target domain deep adaptation network based on domain adaptation, carrying out the analysis of industrial small sample fault data, and rapidly building an industrial small sample fault diagnosis quantitative model based on deep optimal feature transmission; constructing a fault adaptation task set according to the historical fault adaptation tasks; representing the fault adaptation task set in an embedding space; and carrying out model identification and parameter estimation on the normal form learned by the embedded space, and updating the optimal characteristics of the transmission depth of the model, thereby obtaining a fault classification result under an unknown fault task. According to the method, the fault type of the sparse heterogeneous industrial signals under different working conditions can be accurately predicted, the algorithm complexity is low, the calculation period is short, and the portability is high.

The invention discloses calculation models of a leaf spring torsional vibration damper in the technical field of diesel engines. The calculation models include the rigidity calculation model and the leaf spring stress calculation model of the leaf spring torsional vibration damper, wherein the rigidity calculation model is obtained by calculating the bending moment of spring leaves, the interaction force between two spring leaves, the tail end deflection, the total moment and the turn angle, and the leaf spring stress calculation model is obtained by calculating the interaction force between two spring leaves, the bending moment of the spring leaves and the bend section modulus. The calculation models are reasonable in design, high in calculation precision and suitable for model selection and optimization design of the leaf spring torsional vibration damper.

The invention discloses a quick calculation method for an auxiliary surface deformation position posture based on the strain of an antenna supporting leg. The method comprises the steps that structural parameters, working frequencies and material attributes of a main surface, an auxiliary surface, the supporting leg and a back rack of a double-reflection-surface antenna and the distribution positions and number of strain sensors are determined; measurement values of the strain sensors on the antenna supporting leg are extracted, and a finite element model is established; nodes of a junction ofthe antenna supporting leg and the auxiliary surface and corresponding modal vibration mode matrixes are determined; nodes at the strain sensors on the antenna supporting leg and corresponding strainmodal vibration mode matrixes are determined; generalized modal coordinates of the antenna auxiliary surface are calculated; displacement of a connection point of the antenna supporting leg and the auxiliary surface is calculated; the position of the deformed connection point of the antenna supporting leg and the auxiliary surface is calculated; the translation amount of a vertex of the auxiliarysurface before and after deformation and a coordinate conversion matrix before and after deformation of the connection point are calculated, and the position posture after deformation of the auxiliary surface is obtained. According to the quick calculation method, displacement of the connection point of the antenna supporting leg and the auxiliary surface can be quickly and effectively calculated, and the method helps to meet the index requirement of electric performance of the double-reflection-surface antenna.

The invention discloses a method for predicting the performance of a centrifugal pump as a turbine based on an improved artificial neural network. The method firstly calculates the head of the optimal working point of the pump as a turbine at each specific speed in sections. H BEP,T ,flow Q BEP,T , calculate the flow rate of each operating point under the turbine state Q i and Q BEP,T The ratio a and Q i corresponding H i and H BEP,T the square root b of the ratio of Carry out L1 and L2 regularization at the same time; use the training set to train the artificial neural network; finally input the geometric parameters, a and b of the centrifugal pump to be predicted in the turbine state into the artificial neural network after training, and output Head and efficiency for each flow condition. The method of the invention has wide application range, high prediction accuracy and short calculation period.

The invention provides a booster navigation and positioning solving method applicable to high-dynamic rolling reentry. The booster navigation and positioning solving method comprises the following steps: (1) establishing a high-dynamic attitude solving equation according to an optimized three-subsample equivalent rotating vector method; (2) establishing a speed and position navigation solving model of a boosting returning section according to the high-dynamic attitude solving equation established by step (1); (3) establishing an error model of an MEMS (Micro-electromechanical Systems) inertialdevice; identifying errors of the MEMS inertial device according to the speed and position navigation solving model of the boosting returning section of step (2) and boosting reentry actual measurement data, so as to obtain a revised MEMS inertial device output result; and (4) substituting the revised MEMS inertial device output result obtained by step (3) into the speed and position navigation solving model of the boosting returning section of step (2) to realize navigation and positioning solving of a boosting reentry process. The algorithm has the advantages of high solving precision, short calculation period, capability of being adaptive to large-attitude maneuvering and the like, and can provide accurate navigation position information for a booster reentry section.

The invention provides a method of calculating a total process deformation curve of rock mass. The method comprises obtaining structure data of the rock mass, calculating total process deformation data of the rock mass and drawing a total process stress-drain curve of the rock mass. With the weak link strength theory of rock mass mechanics as the basis, the invention obtains structure data of therock mass by comprehensively considering geological conditions of the rock mass, and through SMRM computing software, calculates total process deformation data of the rock mass; and finally, through SMRM computing software again, draws total process deformation data of the rock mass into the total process stress-strain curve of the rock mass, so as to provide rock mass information closer to authentic structure and environmental state for engineering construction and offer important reference data for engineering construction, such that engineering construction design is more reasonable.

The invention provides a novel INS (inertial navigation system) / GPS (global position system) combined position and orientation method. The novel INS / GPS combined position and orientation method includes adopting a linear Kalman filter to perform filtering estimation to GPS original measurement data, and outputting optimal GPS navigation estimation value; according to the optimal position estimation value, providing initial position information to the INS, according to the optimal speed estimation value, providing initial speed information to the INS and solving INS initial measuring data to acquire INS navigation information; adopting a dynamic error model to establish a 9-order extended Kalman filter, integrating the INS navigation information with an optimal GPS navigation estimation value, performing feedback rectification to all INS navigation information at the same moment, and outputting optimal position data and orientation data after rectification and integration. The novel INS / GPS combined position and orientation method has such advantages as high precision, fast data processing speed and low hardware requirement and is applicable to low-cost INS / GPS combined position and orientation plan.

This application discloses a distribution network typhoon disaster loss assessment method and device, the method includes: according to the basic wind pressure calculated from the preset wind direction and wind speed value, the preset parameter samples and the preset mapping relationship to calculate and obtain multiple groups of electric poles Conductor and pole wind load; according to multiple groups of conductors and pole wind load, calculate the multiple pole base bending moments of each pole based on the principle of moment balance; count the poles that are greater than the preset pole resistance bending moment The number of base bending moments is taken as the number of pole failures; the number of pole failures of each pole is divided by the total number of base bending moments of the poles to obtain the failure probability of each pole, and the failure probability is taken as the pole failure rate of each pole. Vulnerability: Update the preset wind direction and speed value to obtain the vulnerability of each pole under different wind directions and speeds. The present application solves the technical problem that the model established in the prior art for the damage of electric poles of complex distribution network lines has a long calculation cycle and cannot effectively evaluate the damage of regional distribution network lines.

The embodiment of the invention provides a check value calculation method and a device of cyclic redundancy check. The method comprises the following steps: inputting the data packet which is equal to the first preset bit wide to a cyclic redundancy check calculation unit corresponding to the first preset bit wide for calculating check value when the data packet which is equal to the first presetbit wide in the data stream is received; and splitting the data packet which is less than the first preset bit wide into two or more data segments with different bit wide when the data packet which is less than the first preset bit wide in the data stream is received, and inputting the split data segments with different bit wide into the cyclic redundancy check calculation unit corresponding to the bit wide of the split data segments for calculating check value. The embodiment of the invention can effectively improve the efficiency of redundancy check value calculation, reduce the time to calculate the cyclic redundancy check value and can effectively satisfy the requirement of data transmission in high speed communication system.

The invention discloses a quick calculation method for an auxiliary surface deformation position posture based on the strain of an antenna supporting leg. The method comprises the steps that structural parameters, working frequencies and material attributes of a main surface, an auxiliary surface, the supporting leg and a back rack of a double-reflection-surface antenna and the distribution positions and number of strain sensors are determined; measurement values of the strain sensors on the antenna supporting leg are extracted, and a finite element model is established; nodes of a junction ofthe antenna supporting leg and the auxiliary surface and corresponding modal vibration mode matrixes are determined; nodes at the strain sensors on the antenna supporting leg and corresponding strainmodal vibration mode matrixes are determined; generalized modal coordinates of the antenna auxiliary surface are calculated; displacement of a connection point of the antenna supporting leg and the auxiliary surface is calculated; the position of the deformed connection point of the antenna supporting leg and the auxiliary surface is calculated; the translation amount of a vertex of the auxiliarysurface before and after deformation and a coordinate conversion matrix before and after deformation of the connection point are calculated, and the position posture after deformation of the auxiliary surface is obtained. According to the quick calculation method, displacement of the connection point of the antenna supporting leg and the auxiliary surface can be quickly and effectively calculated, and the method helps to meet the index requirement of electric performance of the double-reflection-surface antenna.

The invention discloses a split jet aerator, which comprises the following parts: suction inlet, water nozzle, mixing tube, dispersing pipe, tail pipe and distributor, wherein the distributor connects the tail pipe; a cone with the action of deflecting the composite liquid and reducing the local resistance is set in the pipe segment with diffusing angle of tail pipe; the CFD company adopts artificial software value to optimize the design of the structure of jet aerator, which transmits the composite liquid of effluent-living sludge into water nozzle; certain vacuum is formed in the course of jet to form three-phased composite liquid of gas, liquid and solid, which enters into the dispersing pipe to form jet distributor with certain pressure to do inclined ejection to aerate oxygen and stir. The invention improves more dynamic efficiency and more oxygen utility than traditional one, which possesses larger suction quantity, higher bubble quality, evener stirring power and more energy saving.

The invention discloses calculation models of a leaf spring torsional vibration damper in the technical field of diesel engines. The calculation models include the rigidity calculation model and the leaf spring stress calculation model of the leaf spring torsional vibration damper, wherein the rigidity calculation model is obtained by calculating the bending moment of spring leaves, the interaction force between two spring leaves, the tail end deflection, the total moment and the turn angle, and the leaf spring stress calculation model is obtained by calculating the interaction force between two spring leaves, the bending moment of the spring leaves and the bend section modulus. The calculation models are reasonable in design, high in calculation precision and suitable for model selection and optimization design of the leaf spring torsional vibration damper.

The invention provides a PWM signal optimization method for a charging process of a charging pile. The PWM signal optimization method comprises the steps of initializing a prediction equation, carrying out prediction processing and updating a state. The invention relates to electronic equipment and a storage medium which are used to execute the PWM signal optimization method for the charging process of a charging pile. The invention further relates to a PWM signal optimization device for the charging process of the charging pile. A Kalman filtering algorithm used by the invention can process the sampling data in real time, occupies a small memory, does not need to reserve other historical data except the previous state quantity, is high in calculation speed, and conducts new value estimation of the current state according to a specified recursion method only by combining the estimated value calculated by combining the previous state on the basis of the state equation of the system andthe measured value after new data is measured.