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1153results about How to "Adaptable" patented technology

Method for automatically adjusting speed loop control parameters of alternating-current servo system based on inertia identification

ActiveCN101989827ASimple design principleAdaptableVector control systemsSingle motor speed/torque controlControl parametersTorque observer
The invention discloses a method for automatically adjusting speed loop control parameters of an alternating-current servo system based on inertia identification, which comprises the following steps: firstly, a current loop and a servo motor are used as generalized objects, and estimated values of the servo motor and the rotary inertia loaded on the servo motor are obtained by the inertia identification based on a disturbance torque observer; and then a pole collocation method is adopted to adjust proportion parameters and integral parameters of a speed loop proportion integration differentiation (PID) controller automatically. In method for automatically adjusting the speed loop control parameters of the alternating-current servo system based on inertia identification provided by the invention, by combining the inertia identification algorithm based on the disturbance torque observer with the characteristics of an alternating-current servo system, auto-adjustment of the speed loop PID parameters for the alternating-current servo system can be realized under different rotary inertias. Engineers do not need to set and adjust the controller parameters manually according to the experience and the system can automatically carry out the auto-adjustment of the speed loop parameters. Compared with the prior art, the method for automatically adjusting the speed loop control parametersof the alternating-current servo system based on inertia identification is simple in design principle, and has the advantages of good adaptability under the condition that the inertia change of the external load equipment is obvious, and the like.
Owner:SOUTHEAST UNIV +1

Fault location method based on single-terminal location

The invention provides a fault location method based on single-terminal location. The method is characterized by using a transmission line travelling wave fault location device to measure the power frequency quantity of a home terminal bus of a transmission line when short circuit happens to the transmission line, determining the fault point range by an impedance method and estimating the transition resistance; then analyzing the transient voltage/current travelling waves through wavelet transform and adopting a single-terminal travelling wave method combined with the length of line to directly compute the positions of the fault points if the faults are judged to be common short circuit faults; and adopting a transmission line single-terminal fault location method combining the impedance method and the travelling wave method to compute the positions of the fault points if the faults are judged to be special short circuit faults. The method has the following beneficial effects: the accuracy of fault location is ensured by utilizing the single-terminal travelling wave method, can be within 500m and is not affected by such factors as the length of line and the like; and the method can adapt to fault location under the condition of different fault types and is basically not affected by such factors as the transition resistance, the line structure, the system operation mode and the like.
Owner:CHINA EPRI SCIENCE & TECHNOLOGY CO LTD +2

All-ground-anchor type single-tower double-span cable-stayed bridge structure and construction method thereof

InactiveCN106012797AAdaptableStrong terrain adaptabilityCable-stayed bridgeBridge erection/assemblyStructural systemCable stayed
An all-ground-anchor type single-tower double-span cable-stayed bridge system comprises a main beam, a stay cable, a main tower and an anchor. The main beam is composed of a side span main beam body and a main span main beam body. The length of the side span main beam body is far smaller than that of the main span main beam body, and the side span main beam body and the main span main beam body are asymmetrically distributed. The side span main beam body is supported by a support arranged on a side span buttress main tower lower beam and fixedly connected with the main span main beam body and the anchor. The stay cable comprises a main span stay cable body and a side span stay cable body. The main span stay cable body supports the main span main beam body. The upper end of the side span stay cable body is anchored to the main tower and corresponds to the main span stay cable body in position. The lower end of the side span stay cable body is anchored to the anchor. The main tower provides anchorage for the main span stay cable body and the side span stay cable body and meanwhile transmits the vertical force of the side span stay cable body to a foundation through a main tower bearing table and a main tower foundation. The anchor provides anchorage for the whole side span stay cable body and meanwhile balances the horizontal force transmitted by the side span main beam body. The invention further discloses a construction method of the cable-stayed bridge system. The cable-stayed bridge system is high in adaptability, reasonable in structural system, easy and convenient to construct, short in construction period, low in manufacturing cost and small in safety risk in the construction period.
Owner:TONGJI UNIV

Measuring system of three-dimensional shape of strong reflecting surface based on high dynamic strip projector

ActiveCN102937425AAdaptableOvercome the influence of background light on measurementUsing optical meansThree dimensional shapeOptical measurements
The invention relates to a measuring system of a three-dimensional shape of a strong reflecting surface based on a high dynamic strip projector. The measuring system comprises a computer, the high dynamic strip projector and an image acquisition unit. Projection control information is sent to the high dynamic strip projector by the system through the computer, strip images in different light intensities and gray levels are controlled to be projected, meanwhile, control information is sent to the image acquisition unit by the computer, and the image acquisition unit is controlled to carry out photographing in different time periods of exposure; collected image information is transmitted to the computer by the image acquisition unit, the image is processed by the computer, and three-dimensional information of a to-be-detected object is acquired by image fusion, dephasing, phase unwrapping and stereo matching. According to the measuring system of the three-dimensional shape of the strong reflecting surface based on the high dynamic strip projector, saturation and/or excessive darkness of a collected strip image caused by the strong reflecting surface can be overcome, high-precision non-contact optical measurement of the three-dimensional shapes of the strong reflecting surfaces of metals and the like can be realized, and the measuring system of the three-dimensional shape of the strong reflecting surface based on the high dynamic strip projector can be applied to high-precision non-contact optical measurement of the three-dimensional shapes of the strong reflecting surfaces and mirror-similar surfaces of various metals.
Owner:BEIHANG UNIV

Fine shear-wave (S-wave) impedance access technology based on logging and prestack channel set seismic data

InactiveCN101634717AAdaptableEasy to operateSeismic signal processingSeismology for water-loggingOffset distanceAccess technology
The invention relates to a fine S-wave impedance access technology based on a logging and prestack channel set seismic data. The technology is characterized by calculating an elastic modulus of a dry rock matrix and a modulus of saturated fluid rock by a Xu-White equation; taking a conventional sound wave and a density logging as a datum curve based on the estimation of initial S-Wave speed, and correcting and inputting elastic parameters to obtain the initially corrected S-wave impedance information; and establishing an iterative inversion model via an error obtained by comparing the change rule changing with offset distance of amplitude of the prestack channel set and an actual outdoor seismic channel set synthesized by a P-wave and a S-wave and density information with a wave group by a rotation orthogonal direction-based method to finally obtain a S-wave impedance curve. The technology has strong adaptability, convenient operation, simple and easy calculation, strong anti-noise capability, stable S-wave parameters and the like, and position change of a plurality of main in-phase shafts between a synthetic channel set and the actual seismic channel set obtained by initial inversion parameters is consistent with the amplitude change.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

AC/DC compatible vehicle-mounted charger pre-stage circuit and vehicle-mounted charger

The invention discloses an AC/DC compatible vehicle-mounted charger pre-stage circuit and a vehicle-mounted charger. The pre-stage circuit consists of a rectifier circuit, an alternating-current voltage detection circuit, a direct-current voltage detecting circuit, a PFC circuit, a DC/DC boost circuit and a pulse width modulation integrated circuit. The input terminal of the rectifier circuit is connected with an external alternating-current input port; and the output terminal is respectively connected with the input terminal of the PFC circuit and the input terminal of the DC/DC boost circuit. An external direct-current input port is connected with the output terminal of the rectifier circuit; and the output terminal of the PFC circuit and the output terminal of the DC/DC boost circuit are connected with a post-stage power conversion circuit. A first PWM driving terminal of the pulse width modulation integrated circuit is connected with the PFC circuit; and a second PWM driving terminal of the pulse width modulation integrated circuit is connected with the DC/DC boost circuit. According to the technical scheme, compatibility of alternating-current and direct-current voltage inputs is realized; the improvement cost is low; the operation is stable; and the power grid interference and waveform distortion can be reduced.
Owner:STATE GRID CORP OF CHINA +1

Aluminum and aluminum alloy handwork double-gun double-face TIG welding technique

The invention introduces a manual double-torch double-side TIG welding technology for welding aluminum and aluminium alloy. The welding process comprises the following steps: a vertical upward welding technique is adopted, two manual welding torches simultaneously and respectively initiate arc and weld at the front side and the reverse side of welding joints to be welded; two tungsten electrodes are basically aligned; the two welding torches move simultaneously and share a melting bath; the front side of welding lines are filled with welding sticks while the reverse side is not. Welding parameters such as the reverse side welding torch current and the like are less than the welding parameters of the front side welding torch; once weld penetration is achieved and both sides are shaped; argon shield is adopted in the process of welding; inclination angles Alpha and Beta are controlled within the range of 70-100 degrees, the included angle Theta between the welding sticks and the welding torches is maintained within the range of 80-110 degrees. According to the welding technology of the invention, irregular space curve welding lines of medium wall are welded, the applied technology is flexible and the adaptability is high, thus simplifying production procedures and process steps, greatly improving welding efficiency, avoiding possibility of causing interlayer defects due to multilayer welding and improving interior quality of welding lines and appearance quality thereof.
Owner:725TH RES INST OF CHINA SHIPBUILDING INDAL CORP

Extended range electric vehicle energy management method on basis of fuzzy control

InactiveCN102951039AAdaptableGood robustnessSpeed controllerCAN busArea network
The invention relates to an extended range electric vehicle energy management method on the basis of fuzzy control, which particularly comprises the following steps that: 1, a vehicle control unit acquires a storage battery SOC (State of Charge) and bus demand power data; 2, the vehicle control unit judges whether the storage battery SOC is less than or equal to 90 percent, the step 3 is executed if yes, and if no, a range extender is controlled to be switched off by a CAN (Controller Area Network) bus; 3, a fuzzy control module carries out fuzzification on the storage battery SOC and the bus demand power data according to a membership function; 4, fuzzy reasoning is carried out on the fuzzified data according to a set fuzzy rule and the membership function; 5, defuzzification is carried out on a reasoning result by utilizing a centroid method and output power distribution values of the range extender and a storage battery are output; and 6, the vehicle control unit sends the output power distribution values of the range extender and the storage battery to the range extender and the storage battery by the CAN bus. Compared with the prior art, the extended range electric vehicle energy management method has the advantages of strong adaptability, capability of promoting the whole vehicle performance and the like.
Owner:TONGJI UNIV

Human body movement recognition system based on acceleration sensor and method

The invention relates to a human body movement recognition system based on an acceleration sensor, comprising a computer, a plurality of information acquisition subsystems and a main control machine, wherein the information acquisition subsystem and the main control machine are respectively worn on a human body; the main control machine controls the information acquisition subsystems to acquire human body acceleration information and transmits the human body acceleration information to the computer for analysis; the information acquisition subsystem and the main control machine carry out data transmission by a communication mode of wireless radio frequency, thus avoiding inconvenience and uncomfortableness of excessive wires caused by electric connection; even under the lightless condition, only a user carries out movement of relevant modes, the movement of the user can be recognized, therefore, the human body movement recognition system is less influenced by the ambient environment, and has stronger adaptability; and the movement in each movement recognition mode can be adjusted dynamically, a certain movement can be deleted or added, therefore, the user can add or delete the movement to be recognized according to his/her own needs, thus improving the adaptability of the product.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI

Device and method for realtime controlling self-adaptive temperature injection-mould machine and its temperature-adjusting circuit

InactiveCN101073913ASuppression of large hysteresisAdaptableAdaptive controlTime control
The invention is concerned with the controller, the control method and the temperature controlling circuit of the of the self-adapting temperature real-time controlling plastic jetting-moulding machine that for the closed-loop control electric plastic jetting-moulding machine. It is: the controller consists of up-position machine for monitoring and the down-position machine for execution, the up-position machine and the down-position machine connects by communicating line, processes data information processing with central processing unit. The controlling method is: a. the selection of temperature signal; b. the pretreatment of the temperature signal; c. the rule base comparison of the temperature signal; d. the self-adapting adjustment of the control parameter; e. the outputting application of the controlling signal. The advantages are: can inhibit the effect of big lag effectively, with better stability and robustness; can conclude the experience of the temperature control of accumulation and the experience of the operator of the plastic jetting-moulding machine to be the rule base and the knowledge base, add the adaptive control of the parameter at the stage of temperature rise and temperature preservation in order to reduce the difficulty of using; the control precision of the charging basket static state and the working state is high, the produce is high quality and stabilization.
Owner:宋英华 +3

Pseudomonas stutzeri CY003 for efficiently removing trite nitrogen, nitrate nitrogen and ammonia nitrogen from water and application thereof

InactiveCN101724594AAdaptableTo achieve the effect of directional enrichmentBacteriaTreatment using aerobic processesSilver carpChemistry
The invention belongs to the technical field of water environmental biological treatment and relates to a separating screen of a bacterial strain CY003 for efficiently degrading trite nitrogen, nitrate nitrogen and ammonia nitrogen, method for testing safety and preparing bacterial solution, and application for treating domestic sewage and cultivating sewage. The bacterial strain CY003 of the invention is preserved in Chinese Type Culture Collection Center and the preserved number is CCTCC No.: M209196. According to morphological observation, physiologic biochemical analysis and 16S rDNA homology analysis, the bacterial strain CY003 is Pseudomonas stutzeri which can rapidly degrade the trite nitrogen, nitrate nitrogen and ammonia nitrogen in water and is not toxic to the animals such as silver carp, crucian, freshwater shrimp, small white mouse, and the like. At normal temperature, the Pseudomonas stutzeri can excellently degrade the nitrite and the ammonia nitrogen in actual sewage. After culturing 75 h, the Pseudomonas stutzeri can degrade 94.7% and 92.7% of trite nitrogen and ammonia nitrogen in cultivating sewage and can degrade 96.2% and 94.6% of trite nitrogen and ammonia nitrogen in domestic sewage. The invention has wide application prospect.
Owner:YANGTZE RIVER FISHERIES RES INST CHINESE ACAD OF FISHERY SCI

Method for quantitatively analyzing plant nutrient content index based on leaf image characteristics

The invention belongs to the field of plant nutrition and in particular relates to a method for quantitatively analyzing plant nutrient content index based on leaf image characteristics. The method is characterized by acquiring representative sample leaves to carry out image acquisition on the sample leaves after carrying out culture in lack of nutritional elements on the given plants and obtaining the color characteristic sets and shape characteristic sets of the leaves through conversion; establishing relationship mapping tables between the leaf nutrient content index level and the color and shape characteristic sets and establishing color standards at the corresponding levels; and then analyzing images of the samples after acquiring the images of the leaves to be detected, taking the Euclidean distance as the matching evaluation index and searching the tables to obtain the nutrient index level value according to the corresponding color standards after optimizing matching. The method has the following advantages: the generality and the adaptability are stronger; the accurate nutrient content index value can be given according to the images of the leaves to be detected; and the process is simple, the detection speed is high and the method is easy to popularize.
Owner:海南易瑞可高新技术开发有限公司

Machine vision detection device and method for steel rail surface discrete defects

PendingCN107618533AReduces the effects of uneven reflections and rustAdaptableOptically investigating flaws/contaminationRailway auxillary equipmentDefect regionSmoothing filter
The invention discloses a machine vision detection device and method for steel rail surface discrete defects. The method includes the following steps that S1, a steel rail surface defect image is acquired; S2, a background smoothing filter is designed; S3, the original image is smoothened to obtain a background image; S4, the original image and the background image are differentiated; S5, dynamicthreshold value segmentation and connected region marking are conducted. According to the method, the smoothing filter is designed with local gray scale and gradient change information in the image asvariables, large-degree smoothing is conducted on the defect region with large gray scale and gradient changes in a local range, weak smoothing is conducted on shadows generated due to non-uniform reflection, rust and other interference regions, and a background image is generated, the original image and the background image are differentiated, differential image threshold segmentation is conducted, and steel rail surface defect detection is achieved. Influences of light changes, steel rail surface non-uniform reflection and rust can be effectively weakened while image defects are highlighted, and good steel rail surface defect detection effects are obtained under different rail environments.
Owner:LANZHOU JIAOTONG UNIV
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