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96results about How to "Improve precision control" patented technology
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Controllable gain RCS active enhancement method and device
ActiveCN119203786AImprove precision controlHigh precisionWave based measurement systemsChaos modelsPrediction algorithmsFeature extraction
The invention discloses a controllable gain RCS active enhancement method and device, and the method comprises the steps: carrying out the geometric feature extraction and electromagnetic scattering feature extraction of a target three-dimensional CAD model, carrying out the fusion of a tensor network projection algorithm to generate joint feature representation data, and carrying out the dynamic updating of features according to the posture of a target; according to the feature representation data, establishing a nonlinear model by adopting multi-dimensional Lie algebraic dynamics mapping, and generating a prediction model through a chaotic system prediction algorithm; based on the prediction model, a multi-objective constraint optimization algorithm is adopted to construct a control objective function, and a self-adaptive control strategy is generated through a hybrid control law synthesis algorithm; and according to the environment parameters, an environment disturbance compensator is adopted to execute real-time compensation, and controlled quantity conversion is realized through hardware constraint mapping. According to the method, the RCS feature extraction precision and the control response speed are improved, and the system environment adaptability is enhanced.
Owner:NANJING AEROSPACE IND TECH CO LTD
Environment-friendly electrochemical polishing solution for cobalt-chromium-tungsten-nickel alloy and polishing method of environment-friendly electrochemical polishing solution
ActiveCN119663412Aavoid pollutionMeet environmental protection requirementsElectrolytic agentChemical element
The invention relates to the field of electrochemical polishing of cobalt-based alloys, in particular to an environment-friendly electrochemical polishing solution of a cobalt-chromium-tungsten-nickel alloy and a polishing method of the environment-friendly electrochemical polishing solution. The cobalt-based alloy comprises the following chemical elements in percentage by mass: 15.0-25.0% of Cr; w: 10.0% to 20.0%; 0.0% to 15.0% of Ni; the balance is Co and unavoidable impurity elements such as O, N and H. The environment-friendly polishing solution comprises the following chemical components by mole percent: 0.5-2 mol / L of ChCl; 0.7 to 1.0 L of ethylene glycol; 0 to 0.3 L of ethanol; 0.1 to 0.3 L of glacial acetic acid; and a small amount of citric acid. According to the electrolytic polishing, alloy serves as an anode, a U-shaped titanium plate serves as a cathode, the voltage is 40-60 V, the current density is 0.5-2 A / cm < 2 >, and the polishing temperature is normal temperature. The method has the advantages that the environment-friendly electrolyte is adopted, the surface of the cobalt-chromium-tungsten-nickel alloy can be polished, pollution caused by electrolyte of a traditional chromium oxide system and an acid system is avoided, the follow-up repeated cleaning procedure is reduced, and material precision control is improved.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Frequency conversion electric control device, outdoor unit and heating and ventilation equipment
ActiveCN222187170Ureduce stressImprove precision controlLighting and heating apparatusSpace heating and ventilation safety systemsFrequency conversionElectric control
The utility model relates to the technical field of air conditioner heat pumps, in particular to a variable-frequency electric control device, an outdoor unit and heating and ventilation equipment, the variable-frequency electric control device comprises a supporting plate, the supporting plate comprises a first mounting surface and a second mounting surface which are oppositely arranged, and the supporting plate is further provided with a through hole penetrating through the first mounting surface and the second mounting surface; the radiator is mounted on the first mounting surface; and the electric control board is mounted on the second mounting surface and provided with an electronic component, and the electronic component penetrates through the through hole and is in heat conduction connection with the radiator. According to the frequency conversion electric control device, the radiator and the electric control board, the supporting plate can be used as the same fixing reference, the matching precision control degree between the radiator and the electric control board can be effectively improved, the stress in the electric control board is reduced, and the flatness requirement of the electric control board is met.
Owner:HEFEI MIDEA HEATING & VENTILATING EQUIP +2
Double-shaft complete decoupling cutter servo device and design method thereof
ActiveCN119609735Aimprove balancehigh accelerationFeeding apparatusCompliant mechanismControl engineering
The invention discloses a biaxial complete decoupling cutter servo device and a design method thereof, and the biaxial complete decoupling cutter servo device comprises a compliant mechanism platform, a piezoelectric stack I, a piezoelectric stack II, a diamond cutter, a measuring baffle plate, a capacitive displacement sensor I, a capacitive displacement sensor II and an upper cover plate, the diamond cutter is installed on the cutter holder platform, the compliant mechanism platform further comprises a topology compliant mechanism, a first input guide mechanism, a second input guide mechanism and an output guide mechanism, the output guide mechanism is located at the front end of the compliant mechanism platform, and the rear end of the topology compliant mechanism is connected with the front end of the first input guide mechanism and the front end of the second input guide mechanism. According to the method, the compliant mechanism is designed by adopting a topological optimization method, and the optimal mechanism configuration-parameter design can be sought under the condition that a design domain and specified input and output effects are given and a series of constraint conditions are met, so that the mechanism performance is optimal.
Owner:NANJING UNIV OF SCI & TECH
Forming method and shaping die of high-speed wheel spoke plate
PendingCN119657752AHigh precisionimprove consistencyShaping toolsRolling resistance optimizationPunchingManufactured material
The invention discloses a forming method of a high-speed wheel spoke plate, which further comprises a shaping die used in a shaping step, and the method comprises the following steps: 1) plate shearing and blanking are carried out, and a product blank is prepared from raw materials; (2) stretching forming is conducted, and a radial plate contour piece is manufactured through the product blank; 3) punching: punching a mounting hole and a middle hole in the radial plate contour piece; (4) flanging is conducted, specifically, the edge of the radial plate contour piece is flanged; 5) shaping; according to the method, the position precision of the middle hole and the chamfer of the product is remarkably improved. Cooperative shaping machining of chamfers, mounting holes, middle holes and turned-over edges is completed in the same working procedure through the shaping die. And through the synchronous shaping process, the runout control precision and the chamfering position degree of the radial plate are remarkably improved. According to the method, the production efficiency is greatly improved, accumulative errors are reduced, and high-quality and high-efficiency production of the high-speed wheel spoke plate is achieved.
Owner:ZHEJIANG FENGCHI MECHANICAL
Frame for arc-shaped concrete structure construction and construction method
ActiveCN119221691AImprove precision controlincrease stiffnessGeometric CADForms/shuttering/falseworksArchitectural engineeringHorizontal bar
Owner:CHINA CONSTR EIGHTH BUREAU DEV & CONSTR CO LTD
Heat-conducting color-adjustable photothermal conversion film and preparation method thereof
InactiveCN119121158Aflexible adjustmentEfficient thermal conductivityVacuum evaporation coatingSputtering coatingPhotothermal conversionThin membrane
The invention discloses a heat-conducting color-adjustable photothermal conversion film and a preparation method thereof, and belongs to the technical field of solar heat collectors. According to the heat-conducting color-adjustable photo-thermal conversion film disclosed by the invention, due to the adoption of a novel material combination of the reflecting layer, the absorbing layer and the antireflection layer, the film keeps efficient heat-conducting property, and meanwhile, the color is flexibly adjusted. Compared with the prior art, the heat conduction color adjustable photothermal conversion film can keep stable heat conduction efficiency and color expression in different environments. The method has the advantages of higher photo-thermal conversion efficiency, wider adaptability and more personalized visual design.
Owner:SHAANXI UNIV OF SCI & TECH
A curved surface adsorption mechanism
ActiveCN113510736BRealize dynamic changesIncrease structural flexibilityGripping headsClassical mechanicsDisplay device
Owner:苏州奇达创机械有限公司
Walking steering device for robot
ActiveCN222554992UImprove precision controlcontrol precisionElectrical steeringMotor depositionSimulationElectric machinery
The utility model discloses a walking steering device for a robot, which comprises a steering part connected to the bottom of the robot, and the bottom of the steering part is connected with a walking part. A joint motor with high-precision control is selected, meanwhile, a spigot assembly structure in the transmission process is designed, mechanical errors are controlled to the maximum degree, and therefore position changes of the robot can be accurately controlled no matter walking or steering is conducted. On the field unmanned plant protection equipment, in cooperation with Beidou navigation and image recognition technologies, the precision of the whole equipment in field operation can be controlled to the maximum extent, the damage rate of crops caused by equipment position deviation is greatly reduced, and meanwhile the operation completion rate is increased. The joint motor is matched with the walking machine frame, the overall width of the walking mechanism can be controlled to be small, and therefore the walking mechanism has better adaptability to different crops with different plant spacing and can be widely used and popularized.
Owner:GANSU JINKEFENG AGRI EQUIP ENG CO LTD
Motor traction automatic control acceleration system
ActiveCN222636529UImprove stabilityImprove precision controlVehicle testingElectromagnetic wave reradiationAutomatic controlElectric machinery
A motor traction automatic control acceleration system comprises a motor, a runway, an automatic control system, a traction system, an acceleration vehicle, an unhooking system, a forced stop system, a weighing system and a measuring system, the motor is arranged on the runway, the automatic control system controls the motor to rotate, stop, rotate speed and tension, and the acceleration vehicle realizes directional movement through the traction system. The traction system comprises a steel wire rope, the steel wire rope connects a motor and an acceleration vehicle to form a series closed loop, the acceleration vehicle provides pulling force through the motor to achieve acceleration, the unhooking system comprises an unhooking traction tackle, the acceleration vehicle is connected with the steel wire rope through the unhooking traction tackle, and the forced stopping system is arranged at the end of a runway. The weighing system and the measuring system are arranged in a preparation area where the accelerated vehicle starts to park, and the weighing system and the measuring system are used for measuring the weight of the accelerated vehicle and the size of the vehicle type. The beneficial effects are that motor traction acceleration is good in stability and high in precision; whole-process mechanization increases efficiency; and vehicle acceleration is more stable.
Owner:BEIJING HUALUAN TRAFFIC TECH
Double-channel blanking weighing mechanism
ActiveCN119590694AImprove precision controlSmall weight deviationPackagingStructural engineeringFood packaging
The invention relates to the technical field of food packaging equipment, in particular to a double-channel blanking weighing mechanism which comprises a rack, a hopper and a weighing sensor, a first channel and a second channel are arranged at the top of the rack, feeding mesh belts are arranged in the first channel and the second channel, a detachable limiting stop block is further arranged in the second channel, and the hopper is arranged in the limiting stop block. The hopper is further internally provided with a horizontally-telescopic inserting plate, the hopper can form an opening and closing conducting structure through the inserting plate, the inserting plate is movably connected with the weight measuring sensor through a horizontal moving assembly, materials can be fed into the hopper in a large range in the first channel, the split charging gram weight is made to be close to the critical value or below, and the split charging gram weight is made to be smaller than the critical value. And then continuous single material transportation is carried out through the second channel until the gram weight enters the tolerance range, the alternate blanking effect of large-range blanking and small-range blanking can be achieved, the characteristic of small gram weight deviation is achieved, and precise control over the gram weight of the blueberries in the weighing and packaging link is facilitated.
Owner:东莞市宇格自动化有限公司
Heat supply flow adjusting device
The utility model relates to the technical field of heat supply, in particular to a heat supply flow adjusting device which comprises a cylinder body, a top seat is arranged at the top end of the cylinder body, a plurality of sliding grooves are formed in the inner wall of the top seat, a lead screw is rotatably connected to the inner top wall of the top seat through a sealing bearing, a motor is detachably arranged on the top end wall of the top seat, and the motor is connected with the sliding grooves. The output end of the motor is fixedly connected with the top end of a lead screw through a coupler, a cylinder is connected to the outer wall of the lead screw in a threaded mode, a circular plate is connected to the outer wall of the cylinder in an interference fit mode, a plurality of sliding blocks are arranged on the outer wall of the circular plate, the sliding blocks are connected into the sliding grooves in a sliding mode, and a through hole is formed in the wall face between the cylinder body and the top base in a penetrating mode. According to the utility model, a mechanical structure is adopted to control the opening and closing of the flow regulating device, high-precision flow control can be realized, the stability and energy efficiency of a heat supply system are ensured, and the water flow of the heat supply system can be accurately controlled by monitoring and regulating the flow of a pipeline in real time.
Owner:SHENYANG SANJIANG THERMAL POWER CO LTD
Machining device for rough and fine grinding of graphite mold
ActiveCN222134484UPrecision grinding processing volume controlAvoid excessive fine grindingGrinding drivesGrinding machinesBench grinderGraphite
The utility model discloses a processing device for rough and fine grinding of a graphite mould, which comprises a machine table body and a graphite mould workpiece, a table type grinding wheel mechanism is fixedly arranged at the rear part of the machine table body, and a grinding wheel disc of the table type grinding wheel mechanism is exposed out of the top surface of the machine table body and is vertically arranged along the transverse direction; sliding rail mechanisms are installed on the two sides of the machine table body correspondingly. The machining device has the beneficial effects that the distance between a stud and the bottom of a positioning hole can be adjusted in a positive and negative rotation mode of the stud of the machining limiting assembly, so that the distance is consistent with the machining amount of a graphite mold, and then in the process that the main baffle is pushed to drive a graphite mold workpiece to be accurately ground by a table type grinding wheel mechanism; the accurate grinding machining amount of the graphite die workpiece can be accurately controlled in the mode that the bottom of the positioning hole abuts against the end of the stud in a contact mode, the situation that accurate grinding machining of the graphite die workpiece is excessive is avoided, the machining quality of the graphite die workpiece is guaranteed, and waste of materials is prevented.
Owner:GUIZHOU SHENGXIN NEW ENERGY TECHNOLOGY CO LTD
A controllable gain RCS active enhancement method and device
The present invention discloses a controllable gain RCS active enhancement method and device, the method comprises performing geometric feature extraction and electromagnetic scattering feature extraction on a target three-dimensional CAD model, adopting a tensor network projection algorithm to fuse and generate joint feature characterization data, and performing feature dynamic update according to the target posture; according to the feature characterization data, a nonlinear model is established by adopting a multi-dimensional Lie algebra dynamic mapping, and a prediction model is generated by a chaotic system prediction algorithm; based on the prediction model, a control objective function is constructed by adopting a multi-objective constraint optimization algorithm, and an adaptive control strategy is generated by a hybrid control law synthesis algorithm; according to environmental parameters, an environmental disturbance compensator is used to perform real-time compensation, and control quantity conversion is realized by hardware constraint mapping. The present invention improves the RCS feature extraction accuracy and control response speed, and enhances the system environmental adaptability.
Owner:NANJING AEROSPACE IND TECH CO LTD
Calibrating and assembling tool for telescopic arm body of reach stacker
ActiveCN222536646Uachieve calibrationEnable real-time feedbackWelding/cutting auxillary devicesAuxillary welding devicesStructural engineeringStacker
The utility model relates to the technical field of cranes, and discloses a calibration assembly tool for a telescopic boom body of a reach stacker. The telescopic arm body comprises a top plate, a bottom plate and two side plates connected with the top plate and the bottom plate. The alignment mechanism is fixedly arranged on the tool platform, and the alignment mechanism comprises two groups of adsorption devices which are oppositely arranged and are respectively used for adsorbing the two side plates; and the detection mechanism is connected with the adsorption device and is used for determining the relative distance to the left side plate and the right side plate. The calibration assembly tool can improve the production efficiency.
Owner:ANHUI HELI CO LTD
Drilling and soil sampling device for soil detection
ActiveCN224122208Usmooth liftimprove representationWithdrawing sample devicesLifting framesAgricultural engineeringElectric machinery
The utility model discloses a drilling soil sampling device for soil detection, which comprises a lifting plate, a lifting adjusting mechanism, an external rotation soil breaking mechanism and a mounting clamping mechanism, the lifting adjusting mechanism comprises a conical tooth assembly, a lead screw, a threaded plate, a bottom frame and a hinge lifting frame; the external rotation soil breaking mechanism comprises a conveying pipe, a lateral frame, a first motor, a second motor, an external rotation pipe, a transmission tooth assembly, an external rotation blade, a rotating shaft and a conveying blade, and stable lifting of a lifting plate is ensured through threaded fit of a bevel tooth assembly and a lead screw, so that the drilling depth is accurately controlled, high-precision control is provided for soil sampling, and the working efficiency is improved. The external rotation ground breaking mechanism effectively breaks ground by means of the rotation function of an external rotation pipe and external rotation blades, all assemblies can be rapidly connected and fixed through the design of a clamping pipe, a clamping rod, an external extension spring rod and the like of the installation clamping mechanism, and the detachability and maintenance convenience of the equipment are improved.
Owner:DALIAN XINRUILONGCHUANG ENVIRONMENTAL PROTECTION TECH CO LTD
Welding system of liquid crystal display screen assembly
PendingCN121798137Aavoid misalignmentGuaranteed stabilityWelding/soldering/cutting articlesMetal working apparatusLiquid-crystal displaySoldering
The invention provides a welding system for a liquid crystal display screen assembly, and relates to the technical field of laser welding, the welding system comprises a supporting table, a moving assembly, a frame-shaped supporting frame, a laser welding part and a feeding assembly; the supporting table is fixedly arranged in a projection area of a lining back plate of the liquid crystal display screen assembly and used for supporting a non-edge area of the lining back plate, so that the outer periphery of the lining back plate extends outwards and exceeds the supporting table, and a circle of suspended welding operation area is formed. Through the design that a center support is matched with a cantilever type frame-shaped supporting frame, the lower portion and the periphery of the whole welding area of a workpiece are not shielded by any clamp; one-time clamping is achieved, all welding is completed, and the welding efficiency is greatly improved; and when the welding position of the cantilever type frame-shaped supporting frame is converted, the laser welding part and the feeding assembly are always kept in high-precision alignment, the situation that a laser welding point and a connecting part are staggered is avoided, and the stability of the welding effect is guaranteed.
Owner:ANHUI SALAER AUTOMATION TECH
Multifunctional pressure cylinder welding-polishing device
PendingCN119550067Aquality improvementImprove welding qualityOther manufacturing equipments/toolsWeld seamWelding process
The invention discloses a multifunctional pressure cylinder welding-grinding device which comprises a mechanical main arm, a telescopic connecting rod, an outer weld joint grinding device, a molten pool detection camera, an infrared temperature detection device, a welding gun head, an electromagnetic induction heating device, a cylinder pressure container, a base device, a clamp, a telescopic shaft, an inner weld joint grinding device and a visual and sensing device. The infrared temperature detection device and the molten pool detection camera are connected through a connecting rod and located on the two sides of the head of the welding gun. The outer welding seam polishing device is connected with the welding machine main arm through a telescopic connecting rod; the inner welding seam polishing device is connected with the base device through a telescopic shaft, a cylinder clamp is arranged on the outer side of the telescopic shaft and used for fixing cylinders with different diameters, and the visual and sensing device is assembled on the telescopic shaft of the inner welding seam polishing device so that the condition of welding seams in the cylinders can be observed conveniently. Defects and temperature in the welding process can be monitored in real time, high-precision control over welding seam polishing is achieved, and the machining efficiency and the welding joint quality are improved.
Owner:INNER MONGOLIA AEROSPACE HONGGANG MACHINERY
Omni-directional mobile chassis suspension hydraulic system and control method thereof
PendingCN119142092APrevent weak leg problemsImprove precision controlResilient suspensionsVehicle frameControl engineering
The invention discloses an omni-directional moving chassis suspension hydraulic system which is characterized in that a hydraulic oil source is mounted on a frame and connected with a multi-way valve bank, the multi-way valve bank is connected with a suspension valve block assembly, the suspension valve block assembly is connected with a positive cavity and a negative cavity of a suspension oil cylinder, and a non-return element is arranged in the suspension valve block assembly; the suspension oil cylinders are installed on a frame supporting point in groups, at least two suspension oil cylinders are arranged in each group, the suspension oil cylinders in each group are connected with the suspension valve block assembly in a parallel connection mode, a piston ball seat of each suspension oil cylinder is connected with the Mecanum wheel through a wheel axle, and a hydraulic control reversing valve is arranged between a positive cavity and a negative cavity of each suspension oil cylinder. A hydraulic control port of the hydraulic control reversing valve is connected with the multi-way valve set, and the multi-way valve set controls connection and disconnection of a positive cavity and a negative cavity of the suspension oil cylinder. A single-supporting-point type multi-suspension hydraulic communication structure is adopted, so that the grounding specific pressure of a plurality of wheat wheels at the same supporting point is kept consistent, the virtual leg phenomenon of the wheat wheels is effectively avoided, and high precision, smoothness, safety and reliability of a chassis are achieved.
Owner:BEIJING INST OF SPACE LAUNCH TECH
Wire pipe positioning support in steel bar truss floor support plate
The utility model discloses a positioning bracket for a wire pipe in a steel bar truss floor support plate, which belongs to the technical field of construction of wire pipes in floor slabs and comprises a support rod, a connecting part, an adjusting rod, a mounting plate, a positioning nut and a clamping part, the supporting rods are arranged between every two adjacent top steel bars in a spanning mode. The connecting parts are arranged at the two ends of the supporting rod and connected with top steel bars. The adjusting rod is vertically arranged below the supporting rod and connected with the supporting rod, and external threads are arranged on the surface of the adjusting rod. One end of the mounting plate sleeves the adjusting rod; the positioning nuts are in threaded connection with the adjusting rod, and are arranged above and below the mounting plate correspondingly; and the clamping part is arranged at the bottom of the mounting plate and is used for clamping and fixing the wire pipe. The installation position of the adjusting rod can be reasonably selected according to the arrangement position of the line pipe, and therefore the installation position of the line pipe is not limited by the position of an upper chord steel bar. And the mounting plate can be longitudinally adjusted on the adjusting rod, so that the laying height of the wire pipe can be flexibly selected according to the design condition.
Owner:北京常营建设集团有限公司
Shielding steel plate embedded part and S-shaped sleeve group structure and installation and construction method
PendingCN119195466ASolve the shielding effectsolve functionForms/shuttering/falseworksBuilding material handlingStructural engineeringMechanical engineering
The invention discloses a shielding steel plate embedded part and S-shaped sleeve group structure and an installation construction method. The shielding steel plate embedded part and S-shaped sleeve group structure comprises a lower concrete pouring body, a fixed embedded part, a supporting stand column, a transverse supporting assembly, an embedded part supporting steel plate, a shielding steel plate embedded part and an S-shaped sleeve. The fixed embedded part is embedded in a lower concrete pouring body in advance, the supporting stand column is installed on the fixed embedded part, the transverse supporting assembly is installed on the supporting stand column, the embedded part supporting steel plate is installed on the top of the supporting stand column, and the shielding steel plate embedded part is installed on the embedded part supporting steel plate. The shielding steel plate embedded parts comprise the first shielding steel plate embedded part and the second shielding steel plate embedded part, the first shielding steel plate embedded part is located on the front face of the wall to be poured, and the second shielding steel plate embedded part is located on the back face of the wall to be poured. And an S-shaped sleeve is arranged between the first shielding steel plate embedded part and the second shielding steel plate embedded part. The overall stability of the large overweight wall shielding steel plate embedded part and the S-shaped sleeve group structure is improved, and the installation precision requirement is guaranteed.
Owner:CHINA NUCLEAR IND HUAXING CONSTR
Variable-size storage mechanism capable of conveying articles
InactiveCN119408899Aeffective protectionsmall sizeConveyorsConveyor partsMechanical engineeringRetainer (device)
The invention discloses a variable-size storage mechanism capable of conveying articles, and belongs to the technical field of industrial automation. According to the device, a baffle synchronous belt conveying mechanism is used for conveying articles, and a pan-tilt mechanism is used for achieving deformation. The mode that articles are pushed at equal intervals on the side face is adopted, it can be guaranteed that the posture of the articles is not changed during conveying, the posture difference of the articles during conveying is avoided, meanwhile, the device can deform in the V-shaped state, and the size can be contracted when needed so that the storage problem can be solved. The device comprises a baffle synchronous belt transmission module, a holder module, an arc sliding rail module, a mounting bottom plate, an article storage bottom plate and a limiting baffle combination. The baffle synchronous belt transmission module is used for pushing articles; the holder module is used for driving the mechanism to deform; the arc slide rail module is used for ensuring mechanism stability; the mounting bottom plate is used for fixing the device; the article storage bottom plate is used for bearing articles; the limiting baffle combination is used for limiting postures of objects. The method is mainly used for solving the problems of object posture difference and overlarge storage size in the conveying process.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
A LMS adaptive filter design method based on high-precision control system
ActiveCN112803918BMeet filtering needshigh dynamic designAdaptive networkHarmonic reduction arrangementDigital signal processingAdaptive filter
The invention relates to a LMS adaptive filter design method based on a high-precision control system, and belongs to the field of digital signal processing. The method comprises the following steps: step one, setting a performance index of the LMS adaptive filter; step two, setting a selected sampling rate of the LMS adaptive filter according to the performance index of step one; step three, setting a weight update step length μ of the LMS adaptive filter according to the performance index of step one; step four, optimizing an expected signal d(n) of the LMS adaptive filter; setting the number of sampling points Δ according to the expected signal d(n); step five, setting an order M of the LMS adaptive filter; and completing the design of the LMS adaptive filter. The method takes into account dynamic and static performance requirements, is suitable for a high-precision large dynamic control system, and has the advantages of simple structure, convenient engineering implementation, and the like.
Owner:BEIJING AEROSPACE AUTOMATIC CONTROL RES INST
A closed electromagnetic structure
This utility model relates to a closed electromagnet structure, belonging to the field of electrical control switch technology. It includes a housing, within which an electromagnet assembly penetrates one end face of the housing. The electromagnet assembly includes a moving iron core, with a coil frame nested between the moving iron core and the housing. A coil is mounted on the coil frame. A stationary iron core, sleeved with the coil frame, is located at the front end of the moving iron core. A push rod, threadedly fixed to the moving iron core, is located within the stationary iron core. One end of the push rod is threaded onto the moving iron core, forming a linkage between the push rod and the moving iron core. The other end of the push rod passes through the stationary iron core and protrudes outside the housing for outputting power. It has the advantages of simple structure, stable and reliable performance, convenient assembly, and long service life. By optimizing the magnetic circuit and mechanical structure, it can achieve fast response, high-precision control, and high-efficiency output.
Owner:HANGZHOU ZHIJIANG SWITCHGERA
Preparation method of N-type silicon carbide epitaxial wafer
PendingCN119275087AResidue reductionImprove precision controlFinal product manufactureSemiconductor/solid-state device manufacturingCarbide siliconDopant
The invention relates to a preparation method of an N-type silicon carbide epitaxial wafer, in particular to the technical field of silicon carbide epitaxial growth, and the preparation method comprises the steps: carrying out the etching of a substrate, and sequentially carrying out the growth of an N-type buffer layer and an N-type drift layer, and obtaining the N-type silicon carbide epitaxial wafer; an N-type dopant used in the growth of the N-type drift layer comprises a cyanosilane compound. According to the preparation method provided by the invention, by adopting the specific N-type dopant cyanosilane compound, the memory effect of N in the reaction cavity can be remarkably reduced during growth of the N-type epitaxial layer, so that the doping uniformity of N-type SiC in different batches is improved, and stable N doping is favorably realized.
Owner:JINGFENG XINCHI (SHANGHAI) SEMICON TECH CO LTD +2
Quick-release type square and round buckle capable of being accurately adjusted
The utility model relates to a quick release type accurately adjustable square and round buckle which comprises four mounting plates with T-shaped cross sections, each mounting plate comprises a transverse plate and a vertical plate perpendicular to the transverse plate, the four mounting plates are detachably connected end to end to form a square frame shape, and the vertical plates are located on the opposite inner sides of the square frame. A sawtooth-shaped limiting section is arranged between the first end and the middle of the transverse plate, and a limiting piece used for being limited to the adjacent limiting section is arranged at the second end of the transverse plate. According to the square and round buckle, the technical problem of low adjusting precision caused by large distance between two adjacent adjusting through holes of the square and round buckle in the prior art is solved. By means of the limiting section, the precision control is higher, the column formwork is positioned more accurately, original pin piece type fixing is omitted, the installation process is more convenient, meanwhile, pin piece loss is avoided, material loss and waste are avoided, the pressing handle and the installation round rod are matched to control lifting of the limiting plate to conduct disassembly operation, and the disassembly efficiency is improved. And the whole square and round buckle is more convenient and labor-saving to mount and dismount.
Owner:CHINA CONSTR EIGHTH ENG DIV CORP LTD ZHEJIANG CONSTR CO LTD
A bellows fatigue life detection system and detection method
ActiveCN118583677Baccurate locationPrecise position controlNuclear energy generationMaterial strength using repeated/pulsating forces
The present invention provides a bellows fatigue life detection system and detection method, which belongs to the field of bellows detection technology, and solves the problems of insufficient motion control accuracy, significant motion overshoot phenomenon and single test conditions in the detection process of traditional bellows fatigue life detection devices. The bellows fatigue life detection system of the present invention includes a truss, a bottom sliding unit is arranged at the bottom of the truss, a second air guide device is driven translationally on the bottom sliding unit, a first air guide device is arranged on one side of the truss, and a detection station is formed between the first air guide device and the second air guide device. The present invention can achieve high-precision positioning and control by using a bottom slide servo motor, a first slide servo motor and a second slide servo motor in conjunction with the application of an encoder; the design of the present invention takes into account different test requirements and environmental conditions, and can adapt to a wider range of test conditions by adjusting the slide position.
Owner:ZHEJIANG WEIFU TECH CO LTD
Double-cantilever medical hollow fiber membrane curling device
The utility model discloses a double-cantilever medical hollow fiber membrane curling device which comprises a spline transmission shaft, gear boxes, a rotating shaft, hobbing teeth and a base, a sliding rail is arranged on the base, a sliding block set is arranged on the front portion and the rear portion of the sliding rail respectively, a first gear box and a second gear box are installed on the front sliding block set and the rear sliding block set respectively, and the spline transmission shaft penetrates through the two gear boxes. A worm transmission structure is arranged in each gear box to transmit power of the spline transmission shaft to the rotating shaft, hobbing teeth are arranged on the rotating shaft, the two hobbing teeth on one side are opposite in rotating direction and meshed, a tow of the hollow fiber membrane is clamped between the two hobbing teeth to be bent, and corrugation pressing operation of the tow of the hollow fiber membrane is synchronously conducted from the two ends of the rotating shaft. And the balance of the rotating shaft is improved, meanwhile, the corrugation pressing efficiency can be improved, double-line operation is achieved, and layout can be more convenient for subsequent winding.
Owner:CHENGDU HEDA AUTOMATION EQUIP
Micro-hole electric spark forming machining device and method
ActiveCN119457282Aeasy to operateImprove stabilityElectrical-based machining electrodesElectrical-based auxillary apparatusDrive wheelDetent
The invention relates to the technical field of micropore electric spark forming machining, in particular to a micropore electric spark forming machining device and method.The device comprises an electric spark machine tool spindle, a zero-point positioner, a zero-point positioning chuck and a device body, the zero-point positioner is installed at the tail end of the electric spark machine tool spindle, and one end of the zero-point positioning chuck is connected with the zero-point positioner; the device body is installed on the connecting shaft, and a wheel set formed by a first driven wheel and a second driven wheel, a wheel set formed by a third driven wheel and a driving wheel and a wheel set formed by a fourth driven wheel and a fifth driven wheel are arranged on the outer side face of the device body. Gaps for micro electrodes with the diameter smaller than 0.1 mm to pass through are formed between the first driven wheel and the second driven wheel, between the third driven wheel and the driving wheel and between the fourth driven wheel and the fifth driven wheel, a conductive clamping device is arranged at the tail end of the device body, and the micro electrodes penetrate through the gaps of the wheel sets and the conductive clamping device. Machining current is transmitted to the micro electrode through the electric spark machine tool spindle and the conductive clamping device.
Owner:XINXIANG AVIATION IND GROUP
Vehicle acceleration system capable of automatically controlling weight of drop hammer
PendingCN119394576Aimprove securityImprove precision controlProgramme control in sequence/logic controllersShock testingLine sensorAutomatic control
A vehicle acceleration system capable of automatically controlling the weight of a drop hammer comprises the drop hammer, a loading and unloading arm, a tower body, a self-control traction system, an acceleration vehicle and a forced stop system, the top of a drop hammer box body is opened and divided into a plurality of bearing grooves, the bottom of the drop hammer box body is provided with a mounting groove and a pressure strain gauge, and a wireless sensor is arranged in the mounting groove; the pressure strain gauges make contact with the bottoms of the balancing weights and transmit the pressure to the loading and unloading arm through the wireless sensors, and the loading and unloading arm automatically increases and decreases the balancing weights according to the weight needed by the drop hammer. The drop hammer is arranged in the middle of a column type frame of the tower body, the self-control traction system lifts the drop hammer, the drop hammer, the tower body and the acceleration vehicle are connected into a closed loop through a steel wire rope, gravitational potential energy of downward free falling of the drop hammer is converted into acceleration vehicle running kinetic energy, and the acceleration vehicle reaches a specified speed to make contact with the forced stop system, breaks away from the closed loop and continues to freely run forwards. The system is high in safety, high in precision control, mechanized in the whole process, capable of improving the vehicle acceleration efficiency, more perfect in cooperation with different vehicle types, convenient to operate and economical.
Owner:BEIJING HUALUAN TRAFFIC TECH