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129results about How to "Guarantee effectiveness" patented technology

Planning method for recovering autonomous underwater vehicle (AUV) through guide cable of surface unmanned ship

The invention discloses a planning method for recovering an autonomous underwater vehicle (AUV) through a guide cable of a surface unmanned ship. The recovery logical flow comprises the following steps: firstly, starting a recovery process after the AUV ends a task; secondly, judging whether data are abnormal or not; thirdly, judging the state of the AUV, if the state of the AUV is abnormal, performing state exception processing, otherwise issuing an instruction, and executing a next step action; and finally, take whether the recovery is successful as a criterion for judging the end of a logical flow. The invention has the beneficial effects that a planning method of coordinated docking recovery between the autonomous underwater vehicle and the surface unmanned ship is proposed specific tothe operation process of autonomous recovery of the underwater vehicle by the surface unmanned ship. The planning method includes the control strategies of start/stop of a recovery task, coordinatedcontrol of docking and re-planning after docking failure; the effectiveness of the whole recovery process is ensured through whole process planning adjustment; and the success rate of autonomous recovery of the underwater vehicle by the surface unmanned ship is greatly improved.
Owner:HOHAI UNIV

Fuzzy control method of automobile nonlinear active suspension system

The invention aims to provide a fuzzy control method of an automobile nonlinear active suspension system. The method includes the following steps that A, an active suspension system model is established, the state control expectation of the active suspension system is preset, and fractional order differential of a control error signal is defined; B, a fuzzy controller is designed, the control error signal and the fractional order differential of the control error signal are adopted for the fuzzy controller to serve as input variables, and the suspension control force serves as controller output; C, road impact load simulation is conducted on the active suspension system model under the action of the fuzzy controller, and the order parameter of the fractional order differential of the control error signal is determined according to a comprehensive performance index function; D, the control error signal and the fractional order differential of the control error signal serve as the input variables of the fuzzy controller, the output control force of the fuzzy controller is obtained, and control over the actual active suspension system is finished. By means of the fuzzy control method, the problems that by means of an existing technical scheme, scale factors and quantifying factors restrain one another, and the calculated quantity is large are solved, and the fuzzy control method has the advantages of being accurate in control and efficient in calculation.
Owner:GUANGXI UNIVERSITY OF TECHNOLOGY

Electric mechanical type brake system electric control unit based on CAN bus network communication

The invention discloses an electronic control unit of an electromechanical braking system, which bases on CAN bus network communication. The electronic control unit comprises a CAN bus network, a major control node and four minor control nodes, wherein, the major control node receives signals sent by a travel route sensor of a brake pedal and four wheel speed sensors, and then generates a corresponding control signal which is sent to the CAN bus network; the minor control nodes receive own signals from the CAN bus network; the signals received by the minor control nodes go through certain processing and are sent to a braking motor; the braking motor then drives an executive mechanism to brake the wheel. The system of the invention can not only compensate for the defects that traditional hydraulic braking system has too long braking pipelines, excessive valve elements, braking hysteresis happening easily, long braking distance, environment contamination caused by braking liquid, and the like, but also maintain data communication with high efficiency and high reliability in a plurality of electronic control systems of automobiles, which has the function of integrating ABS, TCS, ESP, etc.
Owner:ZHEJIANG ASIA PACIFIC MECHANICAL & ELECTRONICS

Modeling method of ash content accumulation model of diesel particulate filter

ActiveCN108798833AReduce the chance of overloadingDanger of damageInternal combustion piston enginesExhaust apparatusModel methodLoad cycle
The invention discloses a modeling method of an ash content accumulation model of a diesel particulate filter. The modeling method comprises the steps that step 1, the status of an engine is checked;step 2, the diesel particulate filter is weighed initially; step 3, ash content is subjected to loading cycle; step 4, a regeneration mode is entered; step 5, a reference point is tested, the accumulation cycle of the ash content is completed, the next accumulation cycle of the ash content is carried out; step 6, the number times of the accumulation cycle of the ash content is confirmed; step 7, the diesel particulate filter is weighed, engine oil is replaced, and data are recorded; step 8, the running time of the engine is confirmed; and step 9, modeling is carried out for analyzing the corresponding numerical relationship between ash content accumulation and fuel consumption. According to the modeling method of the ash content accumulation model of the diesel particulate filter, the relationship between the ash content accumulation rate and fuel oil consumption and engine oil consumption can be established accurately, and the control accuracy and effectiveness of an ECU for the regeneration process of the diesel particulate filter can be ensured.
Owner:SAIC MOTOR

Quasi-real-time data increment distribution middleware based on Oracle Streams technology and method

The invention discloses quasi-real-time data increment distribution middleware based on the Oracle Streams technology and a method. The middleware comprises a data source module, a message receiving and processing module and a data pool module, wherein the data source module is used for capturing operation information, generating a captured message queue, transferring the captured message queue to an application message queue, parsing messages in the application message queue and then transmitting the messages to the message receiving and processing module on a TCP (Transmission Control Protocol) server; the message receiving and processing module is used for receiving TCP messages, parsing the messages into asynchronous processing messages capable of being recognized by the server, further processing data according to set conversion cleaning rules and then transmitting the data to the data pool module; the data pool module is used for receiving processed data update and synchronizing the data to a plurality of heterogeneous target databases. According to the data increment distribution middleware based on the Oracle Streams technology, the effectiveness of data updating in a distributed environment is ensured, meanwhile, the additional load to a production library caused by data synchronization is effectively lowered, and the performance of the production library is guaranteed.
Owner:DAREWAY SOFTWARE

Digitized quantitative evaluation method of oilfield waterflooding process

ActiveCN107965301AImprove timeliness and efficiencyStrengthen the supervision of water injection processFluid removalResourcesIndex systemEngineering
The invention discloses a digitized quantitative evaluation method of oilfield waterflooding process. The method comprises the following steps of 1, creating a waterflooding process precision management effectiveness evaluation index system structure; 2, creating each level evaluation element fuzzy judgment matrix; 3, according to the fuzzy judgment matrix, creating a fuzzy consistent matrix of evaluation elements; 4, according to the fuzzy consistent matrix, determining each evaluation index weight by using hierarchy rank-ordering; 5, combining oilfield waterflooding development status and waterflooding management check requirements, making a degree of membership table of different index ranges of each evaluation factor; checking the degree of membership according to the value of the eachevaluation factor, and obtaining quantitative results according to the weight. The digitized quantitative evaluation method improves the efficiency and timeliness of analysis evaluation; the digitized quantitative evaluation method takes full advantage of oilfield informatization construction achievements, ensures the timeliness and authenticity of data, has high accuracy, overcomes problems of difficulty in index data acquisition and the like, and provides basis for the quantitative management check of the waterflooding process.
Owner:PETROCHINA CO LTD

Three-dimensional similarity test device and test method for mining of inclined coal seam with adjustable confined aquifer inclination angle

PendingCN112269015AReal step-by-step excavationReal segmental excavationEarth material testingLongwall miningMining engineering
The invention discloses a three-dimensional similarity test device and test method for mining of an inclined coal seam with an adjustable confined aquifer inclination angle, and relates to the field of confined water inclined coal seam mining similarity tests. The three-dimensional similarity test device comprises a test support, an internal frame, a model storage cavity, a loading plate, a horizontal loading system, a vertical loading system, a water pressure loading system, an inclination angle adjusting system, a signal acquisition and processing system, a three-dimensional test model and acoal seam mining simulation system. The test device realizes the adjustability of the inclination angle of the confined aquifer, the gradient distribution of the water pressure load of the aquifer and the authenticity of the stress state of the inclined coal seam in the vertical direction and the horizontal direction, and realizes the segmental and step-by-step excavation simulation of the coal seam in the closed space of the three-dimensional similar model; and the test device can truly invert generation, expansion and penetration of rock stratum fractures of the mining floor of the inclinedcoal seam on the confined water to finally form a dynamic evolution process of a water guide channel, and can better carry out prediction research on water inrush of the mining floor of the inclinedcoal seam with different inclination angles on the confined water in the strike of long-wall mining.
Owner:ANHUI UNIV OF SCI & TECH

Method for managing engineering site based on unmanned aerial vehicle aerial photography and building information model

The invention discloses a method for managing an engineering site based on unmanned vehicle aerial photography and a building information model, and the method comprises the steps: firstly building athree-dimensional building information model of the engineering site, and building engineering construction stage progress models of different stages according to an engineering progress plan and an actual completion condition; a timing unmanned aerial vehicle aerial photography system is established, and the standardization and effectiveness of aerial photography are guaranteed; performing three-dimensional display on the progress condition of the building information model; and inserting the aerial photo into an engineering construction stage progress model, adjusting the position size to enable the image to be aligned with the model, finishing an engineering site construction management model for engineering site management, and implementing monitoring management of an engineering construction site according to the model. According to the method, the aerial photography of the unmanned aerial vehicle and the building information model are combined, the same-platform browsing of the aerial photography of the unmanned aerial vehicle and the building information model is realized, the correspondence between the aerial photography of the unmanned aerial vehicle and the spatial position of the building information model is ensured, and the real-time monitoring of an engineering site construction process is realized.
Owner:SHANGHAI BAOYE GRP CORP

Network terminal information processing method used for remote meter reading and terminal information processing method

The invention provides a network terminal information processing method used for remote meter reading and a terminal information processing method, and relates to the technical field of communication. According to the network terminal information processing method used for remote meter reading, a heartbeat mechanism processing mode is adopted; when an inquire command is obtained each time, whether a terminal command corresponding a terminal code exists or not is inquired in a terminal command library according to the inquire command, the terminal command is transmitted to the terminal corresponding to the inquire command when it is judged that the terminal command corresponding to the terminal code exists, a network terminal obtains the inquire command transmitted by the terminal or transmitted by a specified command generation module every a certain time, and therefore the network terminal can know a code of the network terminal needing command issuing and transmits the terminal command to the corresponding terminal when the corresponding terminal command is locally stored. It is accordingly guaranteed that the network terminal can issue the corresponding control command to the terminal in time, and the control effectiveness of a terminal device is guaranteed.
Owner:太原迪创智能科技有限公司

Processing method and device for predicting aerospace product assembly hours

The invention provides a processing method and device for predicting aerospace product assembly hours. The processing method comprises the steps of creating a process classification library and a textcorpus; sequentially selecting pre-selection processes in the process card database, and obtaining a pre-selection process text and a pre-selection text corpus of the pre-selection processes; performing text mining on the pre-selected process text according to a pre-selected text corpus to obtain a pre-selected text feature vector; when determining that all the processes in the process card database have been traversed, training a man-hour calculation model corresponding to each process type, and storing the man-hour calculation model in a man-hour calculation model library; and obtaining a man-hour prediction value of the to-be-executed process according to the description text of the to-be-executed process and the man-hour calculation model library. According to the invention, the man-hour calculation model based on the process text features is constructed to carry out man-hour prediction, the problem that the current man-hour prediction is not suitable for aerospace products is solved, the accuracy and effectiveness of aerospace product assembly time prediction are ensured, and the production efficiency is further improved.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY +1

Photovoltaic power generation big data prediction method based on feature conversion multi-label learning

The invention requests to protect a photovoltaic power generation big data prediction method based on feature conversion multi-label learning. The method comprises the following steps: 101, carrying out preprocessing operation on data; 102, dividing training set data and verification set data according to historical data and time; 103, performing feature engineering operation on the historical data of the photovoltaic power station; 104, performing feature selection based on the AUC maximum value on the data set with the constructed features; 105, establishing a plurality of machine learning models, and constructing an algorithm model based on feature conversion multi-label learning; 106, accurately predicting the power generation condition of the photovoltaic panel according to the data of the photovoltaic power station based on an algorithm model of feature conversion multi-label learning. According to the historical data of the photovoltaic power station, whether the power generation of the photovoltaic panel reaches the standard or not every day in the future week is predicted, the performance of the photovoltaic panel body is effectively guaranteed, and therefore data supportand decision support are provided for national power input.
Owner:CHONGQING UNIV OF POSTS & TELECOMM

Method for quantitatively characterizing contribution of flow field shearing to interface free energy of oil-water emulsification process

ActiveCN108918347AAchieving Microscale DescriptionsEnsure quantificationSurface tension analysisFluid fieldEmulsified oil
The invention relates to a method for quantitatively characterizing contribution of flow field shearing to interface free energy of an oil-water emulsification process, and the method comprises: (1) deformation description of oil-water emulsified droplets under the flow field shearing; (2) establishment of the relationship between flow field shear stress and emulsified oil droplet-water interfacetension; (3) acquisition of deformation characteristic parameters of the oil-water emulsified droplets under the flow field shearing; (4) correlation between flow field shear energy and interface freeenergy change of the oil-water emulsification process; (5) quantitative characterization of the contribution of the flow field shearing to the interface free energy of the oil-water emulsification process; and (6) repetition of steps (2) to (5) to quantify flow field shear energy and interface free energy change of the oil-water emulsification process in an another physical oil-water medium, or another characteristic flow field to realize the quantitative characterization of the contribution of the flow field shearing of different properties to the interface free energy of different physicaloil-water emulsification processes. The method solves the problems of description of oil-water emulsification behaviors and deformation microscale and stress of the emulsified droplets in the shear flow field of an oil field gathering and transportation system.
Owner:NORTHEAST GASOLINEEUM UNIV
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