87results about How to "Improve design reliability" patented technology

The invention discloses a magnetic field modulation hybrid excitation motor and a multi-working-wave design method thereof. The motor comprises a stator and a rotor, wherein the stator comprises a stator iron core, two sets of windings and permanent magnets, the two sets of windings comprise an armature winding and an exciting winding, the stator iron core is designed as an open slot, one set of windings is distributed in the open slot of the stator iron core, and is wound on one stator tooth in a centralized manner, the outer surface of each stator tooth is provided with a groove, the other set of windings is placed in the groove of the stator tooth, each stator tooth is split into two modulation teeth through the groove, one permanent magnet is placed on each modulation tooth, the otherwinding is wound on two adjacent modulation teeth formed by splitting different stator teeth in a centralized mode, and the magnetizing direction of the permanent magnets is consistent with or opposite to the direction of a magnetic field formed by the excitation winding on the modulation teeth. According to the invention, the permanent magnet magnetomotive force and the excitation magnetomotive force are connected in parallel on the magnetic circuit and are independent from each other, so that the risk of irreversible demagnetization caused by the introduction of an excitation current permanent magnet is avoided, and the effective exertion of the magnetic regulation capability is ensured.

The invention provides a fusing structure and method of an aircraft engine under loads caused by FOB (fan blade off). The aircraft engine comprises a fan rotor, a stator piece intermediate case, a first bearing, a second bearing, a first supporting conical arm and a second supporting wall, wherein the fan rotor is supported by the first bearing and the second bearing, the first bearing is supported on the stator piece intermediate case through the first supporting conical arm, and the second bearing is supported on the stator piece intermediate case through the second supporting wall. The first supporting conical arm is of a thin-wall annular structure and comprises an upper conical arm body and a lower conical arm body. The upper conical arm body is provided with an upper combining surface. The lower conical arm body is provided with a lower combining surface. One of the upper combining surface and the lower combining surface is a concave spherical surface, and the other one is a convex spherical surface. The upper combining surface and the lower combining surface are complementary and are welded into the fusing structure with the strength lower than that of a parent material. The spherical center of the fusing structure is located at the axis of the fan rotor.

The invention discloses a thermal error precision conversion and model building method of a machine tool. The method comprises the following steps: 1) establishing and simplifying a machine tool CAD (Computer Aided Design) model; 2) carrying out CAE (Computer Aided Engineering) thermoanalysis on the simplified machine tool CAD model; 3) extracting the thermal deformation value of each motion axis unit through a CAE thermoanalysis postprocessing module, and converting the thermal deformation value into a basic geometrical error of a unit; and 4) on the basis of the basic geometrical error of the unit, establishing a thermal error model of a machine tool work space. Designers who adopt the method can foresee the thermal deformation of the machine tool and predict the tail end errors, the tail end precision and the like of the machine tool in a machine tool design stage, so that design reliability is increased. The method can save a great quantity of time and money on the basis of CAE software, and can provide comprehensive thermal error information.

This invention discloses a DC solid state relay including an input circuit and an electronic switch circuit responding to the output signals of the input circuit and executing switch operations, in which, the input circuit includes a photoelectric diode, the input of which is connected with exterior circuits, the positive and negative ends are coupled to the electronic switch circuit.

The invention relates to a quick design method of an earth-moon L1 Lagrange point transfer orbit, and belongs to the technical field of spacecraft orbit design and optimization. The quick design method comprises the following steps: a detector applies a first-time maneuvering pulse to the ideal orbit entering point of a Halos orbit, and carries out reverse recursion on the first-time maneuvering pulse to a perilune position which meets leveraging constraints from the Halo orbit of the L1 Lagrange point; the detector applies a second-time maneuvering pulse to the perilune, and enters an earth-moon transfer orbit segment; and the detector applies a third-time maneuvering pulse and finally realizes earth parking orbit capture. Since the design method adopts an inverse integration strategy, a practical detector track departs from the earth, and finally, the Halo orbit of the earth-moon L1 Lagrange point can be achieved. The quick design method aims at different constraint sets, can automatically regulate the target orbit entering point of the Halos orbit, avoids the selection uncertainty of the orbit entering point, and has good reliability and practicality. In addition, speed increment required for finishing a task is small.

The invention discloses a star sensor software online fault monitoring system and a monitoring method thereof. The method comprises the following steps of: writing to-be-transmitted star sensor software key data into an FPGA module by a CPU module by utilizing an address mapping manner; after the FPGA module detects that the electric level state of a handshake signal sent by the CPU module changes, sending the star sensor software key data to ground reception equipment by the FPGA module; and analyzing and displaying star sensor software operation condition by the ground reception equipment in real time, and monitoring software faults online. According to the Star sensor software online fault monitoring system and monitoring method thereof, real-time online monitoring is carried out on star sensor software, the fault problems in the software operation process can be timely positioned, so that the visibility of the star sensor software faults is increased and the troubleshooting efficiency of the star sensor software faults is improved.

The invention relates to a power supply system capable of reducing Rack GPU (Graphics Processing Unit) voltage fluctuation. The power supply system is characterized in comprising a PSU (Program Storage Unit) power supply module, two power supply copper plates, two adaption copper plates and two crown clips, wherein the two power supply copper plates are independently a first power supply copper plate and a second power supply copper plate; the two adaption copper plates are independently a first adaption copper plate and a second adaption copper plate; the crown clips are independently a first crown clip and a second crown clip; the PSU power supply module is connected with the first power supply copper plate; the first power supply plate is connected with the first crown clip through the first adaption copper plate; the first crown clip is connected with a BUS BAR, wherein the BUS BAR is connected with the second power supply copper plate through the second adaption copper plate and the second crown clip in sequence; and the second power supply copper plate is connected with a GPU module mainboard.

The invention provides an intelligent watt-hour meter reliability prediction cloud service platform. By adopting a component stress method to predict the whole meter reliability and the module level reliability of an intelligent watt-hour meter, the failure rate problem of main components in the design can be pointed out to designers in the early stage of product development, so that a reasonable basis is provided for the design or improvement of a product, and a basis is provided for the reliability growth and validation test of the intelligent watt-hour meter. By establishing a cloud platform service mode, watt-hour meter reliability data and prediction service is provided for all parties of industry-university-research and testing organizations in the industry. An intelligent watt-hour meter reliability prediction system is established by adopting a service platform way, and different levels of users and different categories of resources are integrated systematically, so that the standard reliability prediction system is formed; the intelligent watt-hour meter reliability prediction cloud service platform provides a great help to improvement of intelligent watt-hour meter design reliability by engineers, and has great superiority compared with the traditional reliability prediction manual mode.

A portable communication apparatus includes a first antenna radiator, a second antenna radiator, a first feeding point, a second feeding point, and a matching circuit. The first antenna radiator is used for radiating a high-frequency band signal. The second antenna radiator is used for radiating a low-frequency band signal. The first feeding point is coupled to the first antenna radiator and is utilized for processing feed-in or feed-out of the signal of first antenna radiator. The second feeding point is coupled to the second antenna radiator and is utilized for processing feed-in or feed-out of the signal of second antenna radiator. The first feeding point is separate from the second feeding point. The matching circuit is coupled to the first and second feeding points, and used for impedance matching with the first antenna radiator and the second antenna radiator.

The invention relates to a pulsar detector multi-target optimization method based on multi-field coupling analysis. According to the pulsar detector multi-target optimization method, based on X-ray total reflection theory and multi-field coupling characteristic analysis, a multi-target optimization model using detection sensitivity and weight minimization as a target is established, and multi-target optimization is performed by using a Pareto method based on a genetic algorithm to obtain a product multi-target Pareto noninferior solution set; three dimensional modeling is driven based on optimized data, an X-ray pulsar detector light machine thermal coupling analysis model is established, and thermal and structural environmental conditions are simultaneously applied to obtain the strain and the displacement distribution of the product; and the deformation of the surface shape of an optical lens is extracted, the deformed optical system surface shape is obtained by using a polynomial fitting method, and the focusing performance is analyzed based on a ray tracing method. According to the present invention, the automation of the whole process comprising modeling, analysis and design optimization of the X-ray pulsar detector is achieved, and the multi-target pareto solution set of the product is obtained, such that the design efficiency is improved, and more reasonable selections are provided for the design staff.

The invention provides a circuit board schematic diagram design method and device, electronic equipment and a storage medium. The method comprises the steps of receiving input design scheme data; according to the component library, calling a schematic diagram design model to analyze the design scheme data, and outputting a circuit board schematic diagram corresponding to the design scheme data; wherein the schematic diagram design model is obtained by training through a deep learning algorithm; the method comprises the following steps: automatically analyzing received design scheme data by utilizing a schematic diagram design model obtained by training a deep learning algorithm, and automatically obtaining a circuit board schematic diagram corresponding to the design scheme data input by auser according to related component design data obtained from a component library; the automatic design of the schematic diagram of the circuit board is realized, the design efficiency of the schematic diagram of the circuit board is improved, and the whole design process does not need manual participation, so that design errors caused by human factors are avoided, and the design reliability of the schematic diagram of the circuit board is improved.

The invention relates to a high-and-small flow classifying throttling mechanism capable of changing flow resistance within a large range. The mechanism comprises a housing, a motor component fixedly arranged on the housing, an inlet flow guide cover arranged at an inlet of the housing, a small-flow adjusting component, an electrical adjusting component and a rack cover covering the inlet flow guide cover, wherein an inner cavity of the inlet flow guide cover is a flow inlet flow way. According to the mechanism, a small-flow hole and a high-flow hole are respectively designed, so that the high-and-small flow classifying, and the quick switching can be realized. When an engine starts, in order to avoid the ignition shock of a thrust chamber, the less flow is needed, and the high-flow status is needed to be quickly switched. The mechanism is provided with a spring and a gas control chamber, so that the high flow and the small flow can be quickly switched after the control chamber is deflated, and the design reliability of a product can be improved.

The invention discloses an auxiliary test tool and method for a wave spring, and the tool comprises an upper hoop ring and a lower hoop ring. The internal diameters of the upper and lower hoop rings are adapted to the external diameter of a press plate of an electronic universal material testing machine. The upper hoop ring is used for holding an upper press disc of the electronic universal material testing machine, and the lower hoop ring is used for holding a lower press disc of the electronic universal material testing machine. The tool also comprises an extensometer which is installed on the upper and lower hoop rings, and is used for measuring the change of the distance between the upper hoop ring and the lower hoop ring. According to the invention, the auxiliary test tool and the electronic universal material testing machine are employed for automatic constant-speed loading, and the extensometer is used for directly measuring the deformation of the wave spring in a loading process. The tool can avoid a test error caused by manual loading and single-point sampling in the prior art, improves the test precision, and is simple in operation. A test curve is automatically recordedby a computer, and the performance analysis accuracy and testing efficiency of the wave spring are improved.

The invention relates to heat engineering, power engineering and the field of electric heating of liquids, water for instance; it can be used in circulation water heating systems and hot water supply, and as a universal device for diverse electric heaters. An object of the invention are to enhance the ease of fabrication, fabricability, and operability for block electrodes and electrode heating boilers on the whole, to increase the reliability of device both in static and dynamic modes ones. The invention meets an object of extended performance capabilities, versatility and flexibility of the device, potential diversification and enhancement of adaptability in solving particular problems. Moreover, the invention allows improvement of convection in water heating boilers and reduction of uniformity of sludge and rust deposition on electrodes thus increasing the heater effective performance time. The invention object comprises an improvement of protection against breakdowns between the electrodes as well, phase current load imbalance reduction, electrode protection against non-uniform deformation during operation in dynamic conditions. It is also an object of the invention to extend i the range of constructional capacity control without design and dimensional changes. FIG. 2 provides a schematic of electrodes (1) arrangement on the basis (3) located on the inner case (2) side with electrodes (1) slightly deviating from the longitudinal symmetric axis of the case (2) and irregularly spaced on the basis, electrode longitudinal axes deviating from each other at small angles. (4)—outer electrode terminals (1).

The invention provides a cryogenic propellant thermodynamic exhaust system ground integration test device and method, the cryogenic propellant thermodynamic exhaust system ground integration test device comprises a storage tank (1), a vacuum container (2), an active thermodynamic exhaust system and a passive thermodynamic exhaust system, the storage tank (1) is located in the vacuum container (2)and is fixedly connected with the inner wall of the vacuum container (2); an interlayer between the storage tank (1) and the vacuum container (2) is vacuumized through a vacuum unit (21) to simulate the outer space environment. According to the ground integration test device and method, various exhaust schemes and combinations thereof can be tested, most test structural parts in each scheme are arranged outside the storage tank, maintenance is convenient, and the design reliability is improved; structural parts such as a jet mixing device arranged in the storage tank are simple in structure and high in stability.

The invention provides a differentiated simulation design method. According to the method, an electric performance result obtained by performing signal simulation on a wiring rule provided by a chip manufacturer is taken as a reference standard; and when the simulation result of a differentiated wiring design of a user product is better than the simulation result of the wiring rule of the chip manufacturer, the risk degree of the design is low, namely the differentiated wiring design is suitable for a product patternmaking test. The method comprises the following specific steps of: simulating the wiring rule provided by the chip manufacturer; taking the simulation result as a standard for judging whether the differentiated design is reliable; performing a large amount of analogue simulation on differentiated products to make a wiring rule which has a better simulation result than the wiring rule provided by the chip manufacturer; and performing a subsequent design according to the wiring rule. By adopting the differentiated simulation design method, the design reliability of the products is improved greatly, and the differentiated design of the products is realized.

The invention discloses an environmental stress screening time optimizing method and environmental stress screening time optimizing equipment for an electronic product, and belongs to the field of reliability tests of electronic products. Environmental stress screening is an important means for eliminating early failures of a product, and is achieved by applying an appropriate environmental stressto the product before leaving a factory and eliminating potential defects so as to guarantee using reliability of the product. Implementation of the environmental stress screening can reduce the maintenance cost after the product is put into use while the production cost is increased. During the environmental stress screening, component-level and assembly-level screening cost is fully considered,and especially calculation of time and expense cost is introduced, so that the screening time cost is fully considered during the environmental stress screening, and while the design reliability is improved, the screening time is shortened and the production cost is reduced so as to improve the economic efficiency and the production efficiency of an enterprise.

The invention relates to a battery signal acquisition module and a battery protection system using the battery signal acquisition module. The battery signal acquisition module comprises a plurality ofacquisition lines and a acquisition circuit, wherein the acquisition lines are connected with an external battery assembly; the acquisition circuit is connected with the plurality of acquisition line; the acquisition circuit obtains monitoring data of voltage, current or temperature of the battery assembly through the plurality of acquisition lines; the plurality of acquisition lines and the acquisition circuit are arranged on a first flexible circuit board.

The invention relates to a method for each Ethernet data processing module of a verifying base station and equipment thereof. When network data flow is stable, and a sudden peak value of the network data flow happens, the Ethernet data processing module is respectively simulated into a uniform distribution model and a normal distribution model. One Ethernet data processing module is verified whether the module can achieve seamless butt joint with other Ethernet data processing modules by simulated working environment in design stage, thereby remarkably improving design reliability of the Ethernet data processing modules, and simultaneously improving design efficiency of the Ethernet data processing modules.

The invention provides a circuit board, a via hole structure for a circuit board, and a method for realizing a via hole in a circuit board. The circuit board and the method for realizing a via hole ina circuit board are based on the via hole structure for a circuit board. The via hole structure is applied to a circuit board having one group of signal layers for signal transmission and at least one ground layer for grounding; and all signal layers and the ground layer are laminated mutually. Besides, the via hole structure is composed of insulating dielectric layers distributed along an axialdirection of a via hole, first conductive layers for communication of different signals layers on the circuit board, and second conductive layers connected with the ground layers of the circuit board;each two of the first conductive layers, the second conductive layers and the insulating dielectric layers are parallel to each other; and the space between the first conductive layers and the secondconductive layers are filled with the insulating dielectric layers. Therefore, the operation is simplified; the design space of the via hole on the circuit board is saved; and a problem of incontinuity of impedance of the original via hole is solved.

The invention discloses a ferrite switch driver with a self-feedback latch switch-off function. The ferrite switch driver comprises a logic conversion circuit, a driver amplifying circuit, an H-bridgepower driving circuit and a comparator feedback circuit. The logic conversion circuit receives a superior control signal and a feedback signal of the comparator feedback circuit, processes the signals, inputs the signals to the driver amplification circuit for amplification, and then inputs the signals to the H-bridge power drive circuit to drive the ferrite coil. Meanwhile, the comparator feedback circuit samples the current of the ferrite coil, and when the current reaches a preset value, the comparator feedback circuit sends a positive pulse to the logic conversion circuit to turn off theH-bridge power driving circuit. Under the condition that a microcontroller or an FPGA or a CPLD is not used, the ferrite coil can be effectively driven to the preset current, and automatic feedback and latch turn-off can be achieved. Compared with a ferrite switch driver using a microcontroller or an FPGA or a CPLD, the ferrite switch driver has the advantages of being simple in structure, lower in cost, higher in speed and higher in reliability.

The invention discloses a broadband up-converter and an up-conversion method. The invention relates to the technical field of communication, in particular to a digital broadband up-converter and a digital up-conversion method in a digital wireless broadcast technology. The up-conversion method is mainly characterized by comprising the following steps of: carrying out first up-conversion on a digital baseband I / Q (In-phase / Quadrature) signal by adopting a complex multiplier and a digital controlled oscillator I, namely a frequency spectrum shift with small step; then carrying out secondary up-conversion on the digital signal subjected to the frequency spectrum shift with small step to shift the signal frequency spectrum to the needed high frequency section; finally, further processing the signal and then converting the signal into a simulated radio-frequency signal, and wirelessly transmitting the simulated radio-frequency signal to a receiving end by an emitter. In the invention, the up-conversion method can realize broadband up-conversion of with small step adjustment and the broadband up-converter has the advantages of simple structure and good reliability.

The invention discloses a storage battery and voltage stabilizing source switching power supply circuit applied to a cubesat. The circuit comprises a storage battery power supply circuit and a voltagestabilizing source power supply circuit; the front end of the storage battery power supply circuit is connected with a storage battery module on a satellite; the front end of the voltage stabilizingsource power supply circuit is connected with a voltage stabilizing source device outside the satellite; and the rear ends of the storage battery power supply circuit and the voltage stabilizing source power supply circuit are connected with a bus of an on-satellite power supply system. After the voltage stabilizing source power supply circuit is connected with the voltage stabilizing source device outside the satellite, the voltage stabilizing source power supply circuit connects a voltage stabilizing source with the bus, the storage battery power supply circuit disconnects a storage batteryfrom the bus, the voltage stabilizing source provides power consumption during debugging of the whole satellite, and electric energy in the storage battery is not used. When the voltage stabilizing source power supply circuit is not connected with the voltage stabilizing source device, the storage battery power supply circuit connects the storage battery with the bus, and the storage battery provides power consumption for the whole satellite during working. The power supply can be automatically switched, the use is convenient, the thought is novel, and the problem of insufficient power storageof the storage battery during long-time debugging of the cubesat is solved.

The invention discloses a space closed type flexible precise adjusting device and an assembling method thereof. The device comprises a rhombic elastic structure (1), a spiral assembly 1 (2), a spiralassembly 2 (3), a translation screw rod (4), a limiting stud (5), a motor assembly (6), an angular displacement sensor (7), an anti-torque support (8) and a linear displacement sensor assembly (9). According to the closed type flexible precise adjusting device, through the transmission design of a differential screw, submicron-level high precision and high self-locking performance are achieved, and meanwhile displacement transmission is conducted through the rhombus elastic structure (1); and the torsion resistance of the device is greatly improved through the anti-torque support (8). The assembling method plays an important role in guaranteeing the performance of the device and mainly comprises the steps of firstly completing assembling of the main spiral assembly, the standby spiral assembly and a translation screw rod, then installing the structure with the rhombic elastic support as the reference, installing the linear displacement sensor assembly, then installing the main motor assembly and the standby motor assembly, and finally installing the anti-torque supporting structure.

The driving torque design method of the large overload spacecraft driving mechanism of the present invention considers the large deformation reaction of the flexible load battery wing, and solves it in real time through rigid-flexible coupling dynamics reverse, based on the generalized modal mass matrix full coupling algorithm in rigid-flexible coupling dynamics, determined in The torque design envelope of the driving mechanism under each working condition of the rail is selected, and the motor and harmonic reducer are selected through the recursive relationship of the transmission chain. The driving torque design method of the large overload spacecraft driving mechanism of the invention improves the design accuracy and work efficiency of the driving mechanism torque, and the driving mechanism design provides technical conditions with high reliability.

A temperature rise measurement method for a submersible motor is characterized by including steps: measuring the output discharge capacity Q of a submersible electric pump, the outer diameter d of the submersible motor and the inner diameter D of a sleeve; calculating according to the three measured values and a formula v=14.737XQ / (D2-d2) to obtain the surface flow velocity v of the submersible motor, and obtaining a loss correction factor beta according to a formula beta=1-0.3333v; measuring the surface area S of the submersible motor, the total loss P of the submersible motor and a surface area correction factor alpha at a standard flow velocity of 0.2m / s; and calculating the temperature variation theta of the submersible motor according to a formula theta=(PXbeta) / (SXalpha). Temperature rise variation of the electric pump under actual operating conditions can be indirectly quantized and obtained by means of measurement of the method instead of measurement of actual operating condition tests. By the temperature rise measurement method, difficulty and complexity in temperature rise measurement of the submersible motor are lowered, reliability in design of the submersible electric pump is improved, and the service life of a submersible electric pump unit under actual well conditions can be prolonged.

The unfolded reflector of the present invention has a connecting device, which is erected between a plurality of telescopic parts constituting the unfolded truss, and connects the part corresponding to the antinode of the buckling mode and the part corresponding to the node, and the buckling mode is Created on telescoping members when tension is applied to surface cables. In addition, the surface cable is composed of the inner surface cable and the outer peripheral surface cable bonded to its outer periphery. The inner surface cable uses a cable with high rigidity and less length change due to tension changes. A cable with low rigidity and small tension changes due to length changes. The inner surface cables are tensioned from the unfolded trusses through the outer peripheral surface cables to form a predetermined mirror shape.

The invention discloses a deflected and folded inflatable block point connection space capsule shell structure which is cylindrical and is composed of an inner thin film, an outer thin film and protective layers. The protective layers are connected between the inner film and the outer film in a blocking mode, and all the protective layer blocks are integrally and evenly arranged on the periphery of the space capsule. The protective layer blocks forming the protective layers are cuboids, different protective layer blocks are closely arranged at intervals, each cuboid is provided with an upper inner edge and a lower outer edge, each edge is provided with two corner points, and the protective layer blocks are connected with the inner film at the corner points of the upper inner edges of the protective layer blocks. One corner point of the outer edge of the lower part of a body diagonal line of the corner point, connected with the inner thin film, of the protective layer block is connected with the outer thin film, and deflection unfolding of the space capsule is carried out by taking the connected corner point as the center. According to the invention, overall thickness folding can be fully considered, micro meteorite impact from the space can be resisted more effectively, lethal cosmic rays from the sun in the space can be isolated, and therefore the safety of the space capsule is guaranteed, and meanwhile a larger internal space can be expanded under the same compression state volume.

The invention discloses a backlight module and a display device, and belongs to the technical field of display and comprises a casing, a plurality of light sources and a light guide plate, the backlight module is a side-entry backlight module, the casing at least comprises a back plate and a side plate which are integrally formed, a flexible circuit board extending along a first direction is fixedly arranged on the surface of one side, close to the light guide plate, of the back plate, and the light sources are positioned on one side, away from the back plate; the backlight module further comprises a diffusion sheet and a brightening sheet. The brightening sheet and the light guide plate are at least partially overlapped along the direction vertical to the light emitting surface of the backlight module; a shading strip is attached to the surface of the side, close to the light guide plate, of the diffusion sheet. The display device comprises a liquid crystal display panel and the backlight module which are oppositely arranged. The manufacturing process is simple, the narrow frame of the backlight module can be achieved without changing the original manufacturing process of the backlight module, meanwhile, the firefly phenomenon can be avoided, and the display quality of the backlight module can be improved.