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341results about How to "Optimizing Control Parameters" patented technology
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Remote monitoring system for air conditioners
InactiveUS7043339B2Short timeEasy to adjustSampled-variable control systemsMechanical apparatusOperating energyNetwork connection
Owner:SANYO ELECTRIC CO LTD
Postoperation anti-adhesion hydrogel and preparing method thereof
ActiveCN105194740AMeet postoperative anti-adhesion requirementsMeet nursing treatment needsSurgerySolventBiological materials
The invention discloses postoperation anti-adhesion hydrogel and a preparing method thereof. The hydrogel is prepared from sodium alginate powder, chitosan powder, acrylamide monomers, N,N'-methylene bisacrylamide, calcium sulfate, ammonium persulfate and N,N,N',N'-tetramethylethylenediamine. The preparing method of the high-strength high-tenacity chitosan and sodium alginate compound hydrogel is easy to operate, parameters are controllable, the materials are easy to obtain, and the solvent is nontoxic or low in toxicity and safe to treat and use; the method integrates advantages of the two natural biological materials, and the requirement for postoperation adhesion prevention of patients and the requirement for nursing care and treatment of medical workers can be met well. The hydrogel is soft, can be attached to the skin easily, has good flexibility and can effectively prevent wound surface adhesion and be degraded and absorbed, secondary trauma is avoided, and the hydrogel is expected to become a novel postoperation anti-adhesion material.
Owner:HARBIN INST OF TECH
Automobile chassis integrated controller hardware in-the-loop simulation test stand
InactiveCN101308386APrediction is accurateOptimizing Control ParametersElectric testing/monitoringControl systemChassis
Disclosed is a car chassis integrated controller hardware in-the-loop simulation test bed; a car multi-condition digital simulation mathematical model is established on a host machine, translated into C code format, received by a target machine through the Ethernet and then downloaded into the CPU of the target machine; an electronic control unit controls eight electromagnetic valves and receives the state of the electromagnetic valves through a PCL card to control the various car condition digital simulation model running and feedback information stored in the target machine. The car chassis integrated controller hardware in-the-loop simulation test bed has the advantages that the test bed realizes the hardware-in-the-loop of an ECU and an actuator so as to achieve more accurate prediction results of various control parameters; in the early stage of the research and development of the chassis electronic control system, the test bed optimizes the control parameters of extreme dangerous condition; the test bed also simplifies the test environment, and all the performances and optimized parameters obtained in the test are closer to that of real car testing.
Owner:TONGJI UNIV
Brake-by-wire and steer-by-wire hardware-in-the-loop test bench for vehicle
InactiveCN101561353AThe simulation prediction results are accurate and reliableReduce development difficultyVehicle steering/rolling behaviourData acquisitionCurrent sensor
The invention discloses a brake-by-wire and steer-by-wire hardware-in-the-loop test bench for a vehicle. The test bench integrates a brake-by-wire system and a steer-by-wire system into a whole, and is divided into a software part, a real-time platform, a signal processing part and a hardware part, wherein the real-time platform consists of a host and target machines 1 and 2; the host and the target machines 1 and 2 are connected by a wireless network communication system; the signal processing part consists of first and second data acquisition cards with the model of PCL-818HD, third and fourth data acquisition cards with the model of PCL-727, a fifth data acquisition card with the model of PCI-6601 and a V / F conversion module; and the hardware part comprises a rotary angle sensor (12), a torque transducer (13), an opposite rotary motor (16), a steering resistance sensor (21), a steering actuating motor (18), an EMB actuator controller, and EMB actuator, a clamping force sensor, a revolution transmitter and a current sensor.
Owner:JILIN UNIV
High-pressure sintering preparation method of high-densification high-performance nano crystal block thermoelectric material
InactiveCN101549405ASimple processSimple stepsMaterial nanotechnologyThermoelectric device manufacture/treatmentThermoelectric materialsCondensed matter physics
Owner:YANSHAN UNIV
Vehicle double clutch type automatic speed transmission hardware in ring emulation test-bed
ActiveCN101140198APrediction is accurateOptimizing Control ParametersVehicle testingMachine gearing/transmission testingAutomatic transmissionMathematical model
The invention relates to an automobile double-clutch automatic speed changer hardware-in-the-loop simulation test bed; a host machine establishes a digital simulation mathematical model of multiple working conditions of the automobile and converts the digital simulation mathematical model into a C code format, the C code format is received and downloaded to a CPU by a target machine through an Ethernet, an electric control unit controls an executive motor of the two clutches and the executive motor of a synchronizer, and the displacement of the clutch is received through a PCL board card in order to control the operation of the digital simulation model of various working conditions of the automobile stored in the target machine and the information fed back by the target machine. The invention has the advantages of realizing the hardware-in-the-loop of a TCU and an actuator, the more accurate prediction results of various control parameters, optimizing the control parameters of extremely dangerous situations in the prophase of research and development of a DCT electronic control system, simplifying the test environment, and the tested various performances and gained optimization parameters closer to the real vehicle test.
Owner:TONGJI UNIV
Catalyst design for heavy-duty diesel combustion engines
ActiveUS20150165434A1High catalytic efficiencyOptimizing Control ParametersInternal combustion piston enginesMolecular sieve catalystsCombustionHeavy duty diesel
Disclosed are washcoats, coated substrates formed from such washcoats, and catalytic converters for use in diesel applications, such as heavy duty diesel applications. Methods of preparing the coated substrates are also disclosed.
Owner:UMICORE AG & CO KG +1
Monitoring system for servo driving system
InactiveCN102207732AFlexibleShorten the timeProgramme controlComputer controlServices computingNetwork Communication Protocols
The invention relates to a monitoring system for a servo driving system, which comprises a servo driving system, a service computer and a monitoring operation system, wherein the servo driving system supports an EtherCAT bus; the service computer is connected with an EtherCAT interface of the servo driving system and is provided with a supporting real-time network card; the monitoring operation system is arranged in the service computer; and a network card driving module, an EtherCAT driving module, a process data mapping extensible markup language (XML) analysis module, an application communication protocol module and an application module comprising various using functional modules are arranged in the monitoring operation system. The monitoring system can monitor and debug single or a plurality of servo driving systems locally, also can monitor and debug a plurality of servo driving systems remotely. The monitoring system for the servo driving system has the advantages of real-time property, rapidness, accuracy and convenience, and fills a gap of bringing convenience and practicality to monitoring and debugging of the servo driving system on the basis of the real-time Ethernet EtherCAT.
Owner:SHANGHAI SANY PRECISION MACHINERY
Travel device and control method of travel device
ActiveUS20100030441A1Improve robustnessEasy to implementAnalogue computers for vehiclesSpeed controllerAttitude controlEngineering
A travel device includes an attitude detector that detects attitude information of a main body, a vehicle velocity detector that detects a vehicle velocity, a pseudo-attitude command generator that generates a pseudo-attitude information command of the main body based on the detected attitude information, the detected vehicle velocity, an input attitude information command and an input vehicle velocity command when accelerating or decelerating a vehicle, and an attitude controller that performs attitude control in such a way that the attitude information detected by the attitude detector follows the pseudo-attitude information command of the main body generated by the pseudo-attitude command generator.
Owner:TOYOTA JIDOSHA KK
Low-voltage micro-grid inverter control system based on virtual impedance and virtual power source
ActiveCN106712088ALow costAvoid adding filter inductanceAc-dc conversionSingle network parallel feeding arrangementsLow voltageVirtual control
The invention discloses a low-voltage micro-grid inverter control system based on virtual impedance and a virtual power source. The control system comprises a droop controller, a virtual controller and a voltage / current dual-loop controller, and is characterized by establishing the droop controller capable of simulating the function of the virtual power supply through improvement of droop parameters, and carrying out tracking control on the voltage of the droop controller through fractional-order PID; by analyzing relation between virtual negative inductance and micro-source reactive power sharing, determining the value of virtual negative inductance required for accurate reactive power sharing, realizing virtual impedance in the virtual controller, and feeding back voltage drop of the virtual controller to the droop controller to participate in fractional-order PID tracking control of voltage of the virtual power source; and carrying out tracking control on inverter voltage through fractional-order PID in the voltage / current dual-loop controller, determining filtering parameters in the controller according to a transfer function of a filter, and carrying out optimization on fractional-order PID controller parameters through a difference genetic algorithm. The control system can ensure low-voltage micro-grid power decoupling and improve a reactive power sharing effect.
Owner:秦皇岛市睿能光电科技有限公司
BGA (Ball Grid Array) ball embedding method using SMT (Surface Mounting Technology) chip mounter
ActiveCN103429006AEasy to operateOmit production timePrinted circuit assemblingAutomatic controlSurface mounting
The invention discloses a BGA (Ball Grid Array) ball embedding method using an SMT (Surface Mounting Technology) chip mounter. The BGA ball embedding method using the SMT chip mounter comprises the steps of: placing a solder ball carrier plate which carries a solder ball in a feeding region of a disc-shaped carrying device of the chip mounter; fixing a BGA carrier plate fixed with a BGA to the orbit of the chip mounter; and packaging the solder ball on a BGA bonding pad by using a suction nozzle of the chip mounter through special BGA ball embedding chip mounting procedures. The method simplifies BGA ball embedding operation process as the existing SMT chip mounter equipment in the production is utilized, saves cost as the BGA ball embedding chip mounting procedures which are applicable for all BGA are adopted, and a special screen plate is unnecessary to produce, and achieves a fast production response speed as the time taken for producing the screen plate is left out. In addition, as the ball embedding position, pressure and speed are controlled automatically by the high-precision chip mounter, all the parameters are controllable, the ball embedding quality is high, and the method is suitable for BGA ball embedding in batches. Furthermore, as the standard solder ball is used, the ball embedding height is consistent with a brand-new device, the height is restorable and strong universality is achieved.
Owner:CHINA ELECTRONICS TECH GRP CORP NO 14 RES INST
Hardware-in-the-loop test bench based on electromechanical braking system
InactiveCN101561354AThe result is accurateReduce testing costsVehicle testingCurrent sensorData acquisition
The invention discloses a hardware-in-the-loop test bench based on an electromechanical braking system, which is divided into a software part, a real-time platform, a signal processing part and a hardware part, wherein the real-time platform consists of a host and target machines 1 and 2; the host and the target machines 1 and 2 are connected by a wireless network; the signal processing part consists of first and second data acquisition cards with the model of PCL-818HD, third and fourth data acquisition cards with the model of PCL-727, a fifth data acquisition card with the model of PCI-6601 and a V / F conversion module; the first and second data acquisition cards with the model of PCL-818HD and the third and fourth data acquisition cards with the model of PCL-727 are connected with the target machines 1 and 2 by an ISA bus; the fifth data acquisition card with the model of PCI-6601 is connected with the target machine 2 by a PCI bus; and the hardware part comprises an EMB actuator controller, an EMB actuator, a force sensor, a revolution transmitter and a current sensor.
Owner:JILIN UNIV
Remote monitoring system for air conditioners
InactiveUS20050038567A1Sure easyShort timeSampled-variable control systemsMechanical apparatusOperating energyMonitoring system
This invention provides a remote monitoring system for air conditioners installed respectively in a plurality of buildings for concentrically monitoring the operating state of the air conditioners from a distance. The system comprises data collectors 3 installed in the respective buildings, and a remote monitor 4 connected to the data collectors 3 of all the buildings via a communication network. Each of the data collectors 3 collects state data representing the operating state of the air conditioner installed in each building and transmits the collected state data to the remote monitor 4. The remote monitor 4 receives the state data collected by each data collector 3, diagnoses the operating state of the air conditioner installed in each building based on the received state data, and outputs the result of diagnosis. In this way, the air conditioners can be optimally adjusted within a short period of time.
Owner:SANYO ELECTRIC CO LTD
Multifunctional ordered medicine release medical coating film for acute trauma and preparation method thereof
ActiveCN108324986AEasy to operateOptimizing Control ParametersAbsorbent padsBandagesFiberElectrospinning
The invention provides a multifunctional ordered medicine release medical coating film for acute trauma and a preparation method thereof. The multifunctional ordered medicine release medical coating film for acute trauma is characterized by comprising fiber formed through coaxial static spinning; the fiber comprises a bleeding stopping and pain relieving layer and an anti-bacterial healing promotion layer arranged in the bleeding stopping and pain relieving layer; the bleeding stopping and pain relieving layer comprises one or several kinds of materials from high molecular polymers, bleeding stopping factors dispersed into the high molecular polymers and pain relieving medicine; the anti-bacterial healing promotion layer comprises high molecular polymers, antibacterial medicine dispersed in the natural high molecular polymers, and mesoporous SiO2 particles loaded with bioactive factors. The preparation method is simple; the materials can be easily obtained; the treatment and the use are safe; the prepared multifunctional ordered medicine release medical coating film can be matched with different stages of the wound healing; the medicine or active substances required for wound healing can be timely and orderly released.
Owner:DONGHUA UNIV
Method for separating and preparation of Gelsemium elegans alkaloid monomer by high speed counter current chromatography
ActiveCN101323618ASimple and fast operationShort separation cycleOrganic chemistrySolid sorbent liquid separationGelsemium elegansGelsemium
The invention discloses a method for separating and preparing a gelsemium alkaloid monomer from gelsemium by adopting high-speed counter current chromatography, which pertains to the separation method of medicinal plant monomers. The invention takes total alkaloids of gelsemium as a raw material and a high-speed counter current chromatograph as a separating device and the method comprises that a solvent system which is composed of stationary phase and mobile phase is prepared; the high-speed counter current chromatograph is filled with the stationary phase and then the mobile phase is pumped in and balanced; and then sampling is conducted by a sample valve; target components are collected according to the map of a detector or in combination of the detection methods of high efficiency liquid chromatography and thin layer chromatography, and distilled under reduced pressure and then recrystallized to obtain the gelsemium alkaloid monomer with high purity. By adjusting the specific proportional parameters of the solvent system, single or multiple target gelsemium alkaloid monomers can be separated by one step or step by step. The method is convenient and efficient, large in preparation amount, less in sample loss, good in separation effect and high in controllability and applicable to automatic production and the obtained gelsemium alkaloid monomer from separation has diverse pharmacological activities and application prospect to be prepared into medicines.
Owner:FUJIAN MEDICAL UNIV
Interface system of an image-capturing device
InactiveUS20120086846A1Reduce power consumptionLimitation on parameterTelevision system detailsColor television detailsHand heldHuman–computer interaction
An interface system of an image-capturing device is disclosed, which is set on a hand-held image-capturing device. The interface system of an image-capturing device includes a display unit, a touch sensor unit, and a control unit. The display unit displays a variety of setting pictures of the image-capturing device. The touch sensor unit senses a touch of a user so as to change the setting pictures displayed on the display unit. The control unit is connected with the display unit and the touch sensor unit, for controlling the operation of the image-capturing device. The disclosed interface system of an image-capturing device enables the user to adjust various kinds of exposure parameters quickly and intuitively.
Owner:NAT CHENG KUNG UNIV
Preparation method of multifunctional oil-water separation material based on graphene oxide nanobelt
ActiveCN104815608AGood superhydrophilic underwater superoleophobic low adhesion propertiesLow costFatty/oily/floating substances removal devicesOther chemical processesThin membraneOil water
The invention discloses a preparation method of a multifunctional oil-water separation material based on graphene oxide nanobelts, wherein the preparation method includes following steps: (1) cutting functionalized graphene oxide nanobelts in an oxidizing manner; and (2) preparing a graphene oxide nanobelt porous thin film through a vacuum-suction filtering method. The porous screen multifunctional oil-water separation thin film is 38 + / - 2 cm<2> in area and is 5-200 nm in pore size. The multifunctional oil-water separation material screen film can simultaneously perform oil-water separation and heavy metal adsorption to a mixture containing oil and water and heavy metal ions and the like components which are insoluble to each other. The integrated water-purifying renewable film has very important significance on protecting environment and maintaining ecologic system balance.
Owner:HARBIN INST OF TECH
Steel with multi-scale twin-crystal structure and preparation method of steel
The invention discloses steel with a multi-scale twin-crystal structure and a preparation method of the steel. The steel with the multi-scale twin-crystal structure is of a complex microstructure, i.e., a multi-scale twin-crystal and complex phase structure, and the hardness of the steel is reduced in a gradient way from the surface to the center. The preparation method comprises the step of preparing the steel by taking austenitic stainless steel, TRIP (Transformation-Induced Plasticity) steel or TWIP (Twinning Induced Plasticity) steel as materials by using a high strain rate deformation method or high strain rate deformation and temperature deformation treatment combined method. The twin-crystal density of the multi-scale twin-crystal structure ranges from 10% to 90% and changes along with the change of depth, and the twin-crystal density of a surface layer of the multi-scale twin-crystal structure ranges from 30% to 85%, and the twin-crystal density of the center of the multi-scale twin-crystal structure ranges from 10% to 50%. The strength and the plasticity of the steel with the multi-scale twin-crystal structure, disclosed by the invention, are synchronously enhanced; and meanwhile, the favorable ductility is kept. The steel has the highest yield strength of 900-1800MPa, the tensile strength of 1000-2000MPa and the breaking elongation of 30-50%.
Owner:UNIV OF SHANGHAI FOR SCI & TECH
Glass chip for cultivating single cell array based on microfluidic patterning technology and preparation method thereof
InactiveCN103421691AEasy to operateGraphical structure is simpleTissue/virus culture apparatusCell adhesionAdhesion process
The invention discloses a glass chip for cultivating a single cell array based on microfluidic patterning technology, and a preparation method thereof, and belongs to the field of biological micro electro mechanical systems. The glass chip adopts the structure that a layer of PHEMA hydrogel pattern 2 is arranged on a glass base 4, and divides the glass base 4 into a plurality of rectangular cell growth zones 1 to generate the single cell array. The preparation process is that graphical PHEMA processing is performed on the surface of a glass sheet through a PDMS elastic stamp. The glass chip has the benefits that the stable surface chemical modification is adopted, so that hydrogel dressings capable of resisting cell adhesion is arranged on the surface of the glass in a graphical manner to form the cell graphical surface containing cell adhesion and resisting cell adhesion so as to cultivate the single cell array; the preparation process is simple and easy to operate; when the chip is applied to cell culture, the single cell growth array is obtained, and a new tool for studying basic cell biology is provided.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Preparation method of gecko structure simulating adhesive
InactiveCN103274354AGood removal effectLow costNon-macromolecular adhesive additivesDecorative surface effectsAdhesiveElectrochemistry
The invention discloses a preparation method of a gecko structure simulating adhesive and relates to a preparation method of a gecko foot simulating microarray. The preparation method of the gecko structure simulating adhesive, disclosed by the invention comprises the following steps of: (1) preparing a porous metal film by using a hydrogen bubble template method; (2) mixing a high polymer with a cross-linking agent, vacuumizing, pouring the mixed liquor on a template of the porous metal plate for curing; and (3) removing a base and the porous metal template by using chemical and electrochemical methods. The preparation method disclosed by the invention is easy to operate and needs no complex instruments; experiment parameters are controllable; and a prepared gecko foot simulating microarray structure has very high adsorption capacity, also can be easily separated from the absorptive surface and simultaneously has super-hydrophobicity and self-cleaning capability. For the gecko foot simulating microarray prepared by using the hydrogen bubble template method and taking porous metal as a template, the area is 0.1-5 square centimeters, the diameter is 0.5-100 micrometers, the height is 0.5-20 micrometers, the elasticity modulus of a material is 1-15GPa, and the shear strength is 1-150kPa.
Owner:HARBIN INST OF TECH
Process detecting device used in machine manufacturing
ActiveCN108481089AUniform growthGuaranteed accuracy requirementsMeasurement/indication equipmentsNumerical controlEngineering
The invention discloses a process detecting device used in machine manufacturing. The process detecting device comprises a fixed base plate, a numerical control machine case is arranged on the upper end face of the fixed base plate, the numerical control machine case and the fixed base plate are of an integrated structure, a clamp body is arranged in a clamp groove, a taper shaft is fixedly connected to the middle position of the upper end face of the clamp body, the upper side of the taper shaft is sleeved with an expanding sleeve, a hob module is fixedly arranged at the left end of the interior of a machining space, and the left end of a stretchable rod penetrates out of the left end wall of a stretchable space and a stretchable groove and is fixedly connected with an across-measured distance detecting device. When the process detecting device works, a dividing groove guarantees that the expanding sleeve can expand towards the periphery evenly, the coaxality is guaranteed, the accuracy requirement in the machining process is guaranteed, the measurement angle is automatically adjusted, and the accuracy of a measurement value is guaranteed; and in the measurement process, workpieces in machining do not need to be detached, tooth breaking caused by repeated clamping is avoided, machining materials are saved, and the technological controllability is increased.
Owner:XUAZHOU HEIBAILONG ENG NYLON
Electronic control hydraulic power steering system controller and control method thereof
ActiveCN102923185AImprove anti-interference abilityHandling Stability Requirements GuaranteeFluid steeringElectrical steeringMicrocontrollerMicrocomputer
The invention provides an electronic control hydraulic power steering system controller and a control method thereof. The controller comprises a microprocessor module, a power module connected with the microprocessor module, a signal conditioning module, a controller area network (CAN) module and a driver module. When a vehicle steers on site or at low speed, the controller meets the requirement for low-speed steering handiness. When the vehicle steers at high speed, the controller meets the requirement for high-speed handling stability. When the vehicle steers urgently, the controller ensures steering responsiveness. When the vehicle steers in full loading, the controller executes a control program according to assist characteristics of the vehicle at a speed lower than the current speed and enhances road feel in steering. A single chip microcomputer is adopted as a control core of the controller. Due to the fact that signals are transmitted mainly in a digital form, the controller is strong in anti-interference capacity and can enable control to achieve optimization by optimizing the curve the assist characteristics and control parameters.
Owner:JIANGSU UNIV
Rock-soil pressure sensor embedding device and embedding method thereof
ActiveCN103808435AHigh measurement accuracySmall sizeFoundation testingForce measurementEngineeringSoil material
The invention discloses a rock-soil pressure sensor embedding device and an embedding method thereof. The rock-soil pressure sensor embedding device comprises a cylindrical thin-wall vessel, a base, an upper sealing strip, a lower sealing strip, a lining, an outer lining, a band and a pressure sensor. The embedding method includes: arranging the soil pressure sensor embedding device, digging an embedding hole, levelling the basal plane of the sensor, inverting the pressure sensor embedding device, backfilling the original soil material, extracting the cylindrical thin-wall vessel, and backfilling and so on. By means of the rock-soil pressure sensor embedding device and the embedding method thereof, the digged pit slot is small, the size of a protecting layer needed for the sensor is small, the embedding efficiency is improved, the measuring precision is improved, the protecting layer is avoided from loosening in vibration rolling, and the problem of embedding the sensor in coarse granular materials is solved.
Owner:JSTI GRP CO LTD
Method for separating and preparation of Gelsemium elegans alkaloid monomer by high speed counter current chromatography
ActiveCN101323618BSimple and fast operationShort separation cycleOrganic chemistrySolid sorbent liquid separationGelsemium elegansGelsemium
Owner:FUJIAN MEDICAL UNIV
Catalyst design for heavy-duty diesel combustion engines
ActiveUS9427732B2High catalytic efficiencyOptimizing Control ParametersInternal combustion piston enginesMolecular sieve catalystsConvertersCatalytic transformation
Owner:UMICORE AG & CO KG +1
Composition with auxiliary blood sugar reduction efficacy, and preparation method and application thereof
InactiveCN106606529AGood hypoglycemic effectReduce absorptionOrganic active ingredientsHydrolysed protein ingredientsBitter gourdAdditive ingredient
The invention provides a composition with an auxiliary blood sugar reduction efficacy, and a preparation method and application thereof, and relates to the technical field of medical care. The composition is mainly prepared from the raw materials in parts by weight: 20 to 50 parts of L-arabinose and a bitter gourd preparation, wherein the bitter gourd preparation comprises any one material of 15 to 35 parts of bitter gourd powder, 10 to 50 parts of bitter gourd extracts and 1 to 5 parts of bitter gourd polypeptide. The composition has the advantages that on one hand, the effects of controlling the conversion and adsorption of the human body on sugar and enhancing the insulin are achieved, and the blood sugar can be reduced in a synergistic way; and on the other hand, the recipe selects raw materials with simple ingredients, so that the absorption is easy, and the dependence cannot be easily generated. The preparation method of the composition is characterized in that the raw materials and a bonding agent are mixed and are prepared into granules. The preparation method has the advantages that the technological process is short; the operability is high; and the industrial production is facilitated.
Owner:NANJING SHENGNUO BIO TECH IND
Method for detecting flavoring uniformity of cut tobacco based on main component analysis technology
InactiveCN108387651AOptimizing Control ParametersOptimal control methodComponent separationVapor phase chromatographyEngineering
The invention discloses a method for detecting the flavoring uniformity of cut tobacco based on a main component analysis technology. The method comprises the following steps: (1) preparing samples: uniformly taking samples by time or position from the flavoring outlet of a cut cigarette making line; (2) placing every sample in a brown headspace bottle, adding an internal standard solvent, and screwing bottle caps to seal the bottles; (3) detecting the content of volatile and semi-volatile components in every sample in a headspace-gas chromatograph / mass spectrometer (HS-GC / MS) full-scanning manner, performing mass spectrum database retrieval to achieve qualitative diagnosis, and performing quantification through an internal standard technology; (4) performing dimension reducing processingon the detection data of every sample through a PCA main component analysis technology, and projecting the data in a two-dimensional plane or a three-dimensional space; and (5) drawing a PCA map by using computer software, and detecting the flavoring uniformity of the cut tobacco according to the discrete degree of distribution of data points. The method provides a scientific and intuitive methodfor evaluating the flavoring uniformity of the cut cigarette, and can be used for detecting the flavoring uniformity of cut tobacco in different cut tobacco flavoring devices or different flavoring processes.
Owner:CHINA TOBACCO YUNNAN IND
High-speed laser welding method for invar film
InactiveCN103862173AReduce the tendency of welding hot crackingFast welding speedWelding/soldering/cutting articlesLaser beam welding apparatusLight beamOptoelectronics
The invention discloses a high-speed laser welding method for invar film, and belongs to the technical field of high-speed laser welding. According to the high-speed laser welding method for the invar film, parallel laser beams of a laser welding machine are divided into first reflection laser beams and second reflection laser beams through a weir type spectroscope, the first reflection laser beams are focused through a focus lens to form a preheating laser beam, the second reflection laser beams are focused through a focus lens to form a welding laser beam, and the preheating laser beam and the welding laser beam carry out preheating and welding on a weld joint of a welding test piece at the same time. According to the high-speed laser welding method for the invar film, welding is carried out in a double-beam laser serial mode, the previous laser beam is used for preheating, the later laser beam is used for carrying out welding, the temperature gradient and welding stress are reduced through control over distribution of weld heat input energy on the weld joint and in the nearby area, and therefore high-speed flawless welding of invar is achieved.
Owner:DALIAN UNIV OF TECH
Servo system control method based on relay feedback
ActiveCN101807878AHigh control precisionCompensation for dry frictionElectric motor controlLower limitTime delays
The invention relates to a servo system control method based on relay feedback, belonging to the technical field of motion control. The method comprises the following steps of: controlling a servo system for the first time by using a relay with an initial amplitude value to acquire a rotation rate after initial motion time; acquiring a relay amplitude value corresponding to the upper limit and the lower limit of the rotation rate according to the motion information of the first time, and respectively carrying out motion control on the servo system for the second time and the third time under the amplitude value through the relay in a time delay mode to acquire a stable response amplitude and a stable response cycle; identifying system model parameters and a dry friction magnitude according to the motion information of the second time and the third time; and carrying out optimization of control parameters and feedforward compensation of dry friction based on the identified parameters. The method of the invention can be used for quickly optimizing controller parameters and realizing effective compensation of friction, thereby improving the control accuracy of the servo system.
Owner:SHANGHAI JIAO TONG UNIV
Arch ring compilation method of parabolic double-curvature arch dam
ActiveCN107133383AThe parameters are simple and clearImprove modeling and analysis efficiencyGeometric CADSpecial data processing applicationsThree dimensional modelSoftware
The invention provides an arch ring compilation method of a parabolic double-curvature arch dam. On the basis of analysis of double-curvature arch dam basic parameters, based on the powerful parametric modeling function of CATIA software, three-dimensional modeling of the arch dam can be achieved, and dam stress analysis, rendering effect picture, generation of a two-dimensional picture and calculation of work amount and the like are conducted with a three-dimensional model imported into relevant software. The method has the advantages that building of the arch ring of a parabolic double-curvature arch dam completely relies on parametric driving, and adjustment of the arch dam shape can be completed through modification of the basic parameters, so that the modeling and analysis efficiency is greatly improved.
Owner:CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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