30results about How to "Solve the problem of divergence" patented technology

The method for heating a screw cylinder of a spinning machine, designed by the invention, specifically comprises that: for the screws equal to [phi]105 millimeters and below [phi]105 millimeters, electromagnetic heating is implemented in each heating region by using 220V power source; three-phase four-wire 380V power source is utilized to power apparatus above [phi]105 millimeters, and 2-4 electromagnetic heating coils are utilized to heat in each hearing region; an electromagnetic controller rectifies alternating current to direct current and converts the direct current into high-frequency current having frequency of 20-40KHz; when magnetic lines of force pass through the screw cylinder of a magnetically conductive metal material, numberless small vortexes are generated in the metal so that material in the screw cylinder reaches ideal heating effect. The screw cylinder device resulted from the invention makes use of electromagnetic induction principle to heat the screw cylinder and is provided with a heat preservation layer, a heat insulation layer and the like outside of the screw cylinder, thus solving the problem that heat is dispersed to air to maximize heat efficiency.

The invention discloses a spliced stator iron core of a tractor. The stator iron core consists of a plurality of separated stator blocks, wherein each separated stator block is formed by laminating a plurality of blocks of separated stator stamped sheets with the same structure; a winding groove winding a stator coil is formed on each of the separated stator stamped sheets; and the plurality of separated stator blocks fix the plurality of separated stator blocks through pressing rings to form the annular stator iron core with a certain thickness. The invention provides a combined stator iron core. In the invention, the stator iron core of a lifter tractor is modified into a separated structure from an integrated structure, namely a tractor stator winding is divided into a plurality of separated stator iron cores, and the plurality of separated stator iron cores are combined into one through a reliable structure, so that the material utilization rate of the stator winding, the working performance of the tractor and the power output of the tractor are greatly improved.

The invention discloses a nanometer cold cathode electron source of a coplanar double-gate focusing structure, which comprises a substrate, an insulating layer, a bottom-layer segmented cathode electrode, a bottom-layer gate electrode, an etching through hole, a top-layer annular cathode electrode, a top-layer internal gate electrode, a top-layer external annular gate electrode, a growth source thin film, a nanowire cold cathode and a focusing electrode, wherein the top-layer internal gate electrode and the top-layer external annular gate electrode are connected with the bottom-layer gate electrode through the etching through hole, and the top-layer annular cathode electrode is connected with the bottom-layer segmented cathode electrode through the etching through hole. The invention further discloses a preparation method of the nanometer cold cathode electron source of the coplanar double-gate focusing structure. The nanometer cold cathode electron source has strong gate-control electron emission capability and electron beam focusing capability and has a coplanar double-gate focusing structure capable of row and column addressing.

The invention discloses a system architecture construction method and belongs to the field of system engineering. On the basis of an N2 diagram of a system architecture, an architecture allocation sheet is constructed, the allocation condition of multiple physical devices in any architecture scheme is represented, then all physical interface relations of the physical devices in the architecture allocation sheet when the physical device realizes corresponding functions are listed, and a second N2 diagram with physical interface relations is constructed according to the physical interface relations; finally, multiple architecture schemes with the physical interface relation similarity up to the threshold under different architecture schemes are found out from the second N2 diagram, the same physical device with different indexes under the multiple architecture schemes is found out from the architecture allocation sheet, a spider diagram of the physical device is constructed, and the optimal system architecture scheme is selected according to the spider diagram. With the adoption of the method, the functional requirement of the system is unfolded in a hierarchy form, ordinal relations and data streams among functions are displayed, and the optimal architecture scheme can be selected.

The method for heating a screw cylinder of a spinning machine, designed by the invention, specifically comprises that: for the screws equal to [phi]105 millimeters and below [phi]105 millimeters, electromagnetic heating is implemented in each heating region by using 220V power source; three-phase four-wire 380V power source is utilized to power apparatus above [phi]105 millimeters, and 2-4 electromagnetic heating coils are utilized to heat in each hearing region; an electromagnetic controller rectifies alternating current to direct current and converts the direct current into high-frequency current having frequency of 20-40kHz; when magnetic lines of force pass through the screw cylinder of a magnetically conductive metal material, numberless small vortexes are generated in the metal so that material in the screw cylinder reaches ideal heating effect. The screw cylinder device resulted from the invention makes use of electromagnetic induction principle to heat the screw cylinder and is provided with a heat preservation layer, a heat insulation layer and the like outside of the screw cylinder, thus solving the problem that heat is dispersed to air to maximize heat efficiency.

The invention discloses a method for reducing double-sided surface magnetic difference of a sintered neodymium-iron-boron magnet, which is characterized in that a powder preparation process is improved, so that a lubricant can uniformly wrap and infiltrate powder particles, the internal stress of fine powder is fully removed, the flowability is obviously improved, the subsequent feeding uniformity is fully guaranteed, and the quality of the sintered neodymium-iron-boron magnet is improved. Meanwhile, the structures of the forming die and the magnetizing pole heads of the pressing machine are improved, so that the female die is clamped in open grooves of the two magnetizing pole heads, and the forming die and the pressing machine are clamped and matched, so that magnetic lines in a die cavity of the female die are distributed in parallel during magnetizing orientation, and the specific size of the die cavity of the female die is set; the magnetic field uniformity of the cavity of the female die is improved, the friction force between the periphery of the green body and the side wall of the cavity of the female die during forming and demolding is reduced, fine powder of each particle of the obtained green body does not generate obvious displacement after magnetizing orientation and pressing, and the density of the green body is uniform; the method has the advantages that the product percent of pass and the production efficiency can be improved while the double-sided surface magnetic difference of the sintered neodymium-iron-boron magnet is remarkably reduced.

The invention discloses a nano-cold cathode electron source with a coplanar double-gate focusing structure, which includes a substrate, an insulating layer, a segmented cathode electrode at the bottom layer, a gate electrode at the bottom layer, an etched through hole, a ring-shaped cathode electrode at the top layer, and an inner portion of the top layer. Gate electrode, top-layer outer ring-shaped gate electrode, growth source film, nanowire cold cathode, focusing electrode, the top-layer inner grid electrode and the top-layer outer ring-shaped gate electrode are connected to the bottom gate electrode through an etched through hole , the ring-shaped cathode electrodes on the top layer are respectively connected to the segmented cathode electrodes on the bottom layer through etching through holes, and a preparation method of a nanometer cold cathode electron source with a coplanar double-gate focusing structure is also disclosed. The nano-cold cathode electron source has strong grid-controlled electron emission capability, electron beam focusing capability and a column-addressable coplanar double-gate focusing structure.

The invention discloses a planar magnetic core. Side plates have L-shaped structures consisting of long plates and short plates; the two side plates are positioned on both sides of a bottom plate in the length direction, and are vertical to the bottom plate; the long plate directions of the side plates are consistent with the width direction of the bottom plate, and the lengths of the long plates are equal to the width of the bottom plate; the short plates of the two side plates are positioned on the same side of the bottom plate; the length-width direction of a winding post is consistent with the length-width direction of the bottom plate; the distances D1 between the two ends of the winding post in the width direction and the two side plates D1 are smaller than the length R1 of the winding post; the distances D2 between both sides of the winding post in the length direction and both sides of the bottom plate in the length direction are smaller than the width R2 of the winding post; two grooves are formed in the bottom plate by extending from the two side faces of the winding post in the length direction to both sides of the bottom plate. According to the planar magnetic core disclosed by the invention, the magnetic core is reasonable in structural layout and large in the effective working area, so that the problem of divergence of coil magnetic induction lines on the root of the winding post is solved, and the stability and reliability of the electromagnetic property of the magnetic core are improved. The invention further provides a circuit board in which the planar magnetic core is applied.

A dual flow channel gathering type paraxial powder conveying feeding nozzle comprises a top plate, a wedge-shaped plate and a bottom plate which are sequentially horizontally overlapped from top to bottom and are mutually fixed, wherein a main flow channel is arranged at large head end of the wedge-shaped plate, and an inlet end of the main flow channel exposes from the side surface of the wedge-shaped plate to form a main inlet; an upper flow channel which extends along the top surface of the wedge-shaped plate is arranged between the top plate and the wedge-shaped plate; a lower flow channel which extends along the bottom surface of the wedge-shaped plate is arranged between the bottom plate and the wedge-shaped plate; the near end of the upper flow channel communicates with an outlet end of the main flow channel through a first flow distributing channel; the near end of the lower flow channel communicates with the outlet end of the main flow channel through a second flow distributing channel; a far end of the upper flow channel extends to the surface of a small head end of the wedge-shaped plate to form an upper flow channel outlet; the far end of the lower flow channel extends to the surface of the small head end of the wedge-shaped plate to form a lower flow channel outlet.

The invention discloses a transmission and distribution collaborative power flow calculation method based on the update of the historical value of the iterative variable. The method includes seven main steps: initialization, updating the iterative variable based on the historical value of the iterative variable, convergence inspection, iterative calculation of the transmission and distribution network, and memory Matrix update, current iteration number update, maximum iteration number check. Compared with the traditional master-slave split method, the method of the present invention introduces a memory matrix, and updates the iterative variable based on the historical value of the iterative variable, which can significantly improve the efficiency and robustness of the overall algorithm for transmission and distribution coordinated power flow calculation, especially in the distribution network. When the disturbance of the transmission network is large, that is, when the sensitivity of the boundary node injection power to the boundary node voltage amplitude is high, it can solve the divergence problem of the traditional master-slave split method. At the same time, the method has strong operability and is easy to implement.

The invention discloses a transmission and distribution coordinated power flow calculation method based on least squares method fitting correction. The method includes the following seven main steps: initialization, distribution network power flow calculation, transmission network power flow calculation, convergence test, Fit correction for multiplication, update of the current iteration number, and verification of reaching the maximum number of iterations. In the method of the present invention, the iterative variable is fitted and corrected by using the least square method, which can significantly improve the efficiency and robustness of the overall algorithm for the transmission and distribution coordinated power flow calculation, especially when the distribution network has a large disturbance to the transmission network, that is, the boundary When the node injection power is highly sensitive to the voltage amplitude of the boundary nodes, it can solve the divergence problem of the traditional master-slave split method.

The invention discloses a vehicle cooperative navigation method based on relative motion model constraints, and belongs to the technical field of vehicle cooperative navigation. In this method, the state equation of the cooperative navigation system is constructed on the basis of the error equation of the inertial navigation system; then the Doppler frequency shift effect is used to calculate the frequency offset of the vehicle-mounted wireless broadcasting due to the relative motion of the vehicle, and then the relative meeting time is judged; Establish the relative motion model of the vehicle and the measurement equation based on the relative motion model during the meeting; finally, the state equation and the measurement equation are discretized, and the measurement is updated during the meeting, and the system state quantity is fed back and corrected. Realize the effective modification of the cooperative navigation system. The invention can effectively utilize the relative motion constraint information of the vehicle in tunnels and other satellite navigation failure environments, realize effective integration with inertial navigation, improve the accuracy and reliability of the vehicle navigation system, and is suitable for engineering applications.

The invention discloses a position estimation method based on integrated navigation of multiple sensors. The method comprises the following steps: 1, parameters output by a DR, a GPS, a DME, a VOR and an ADC are acquired; 2, a state equation is established; 3, a position and velocity measurement equation of the GPS, a slope distance measurement equation of the DME and an azimuth measurement equation of the VOR are calculated; 4, a comprehensive measurement equation is established according to each measurement equation; 5, by combining the state equation and the comprehensive measurement equation, position error amount and velocity error amount are estimated; and 6, according to the estimated position error amount and velocity error amount, output correction is carried out on the DR system, and position estimation is finished. According to the invention, there is no need to use an inertial navigation system. The method provided by the invention has high positioning accuracy, high reliability and good real-time performance, is economic, effective and easy for engineering realization, and can meet high-precision and high-reliability positioning requirements of civil aircrafts.

The invention discloses a system architecture construction method and belongs to the field of system engineering. On the basis of an N2 diagram of a system architecture, an architecture allocation sheet is constructed, the allocation condition of multiple physical devices in any architecture scheme is represented, then all physical interface relations of the physical devices in the architecture allocation sheet when the physical device realizes corresponding functions are listed, and a second N2 diagram with physical interface relations is constructed according to the physical interface relations; finally, multiple architecture schemes with the physical interface relation similarity up to the threshold under different architecture schemes are found out from the second N2 diagram, the same physical device with different indexes under the multiple architecture schemes is found out from the architecture allocation sheet, a spider diagram of the physical device is constructed, and the optimal system architecture scheme is selected according to the spider diagram. With the adoption of the method, the functional requirement of the system is unfolded in a hierarchy form, ordinal relations and data streams among functions are displayed, and the optimal architecture scheme can be selected.

The invention discloses an LED micro display array flip chip and a manufacturing method. The flip chip comprises a substrate, a plurality of grooves, a transparent thin film layer and an LED micro pixel array arranged on the substrate, wherein the plurality of grooves are etched in the substrate in an array; the grooves are filled with the transparent thin film layer; various LED micro pixels correspond to the grooves one by one; a refractive index of the transparent thin film layer is greater than 2.3; the transmittance on blue light or green light is greater than 97%; each LED micro pixel comprises an N-type GaN layer, a multi-quantum well layer and a P-type GaN layer which are sequentially deposited on the substrate; the N-type GaN layers of the LED micro pixel array are connected into a whole to form a common cathode, and an N electrode metal contact layer is deposited on the common cathode; and a P electrode metal contact layer is deposited on the P-type GaN layers in an LED micro pixel region. According to the LED micro display array flip chip, a transparent thin film layer material with a high refractive index is deposited on the substrate, so that better convergence of light-emitting layer light sources is achieved; the problem that light is diffused after entering a sapphire substrate with a low refractive index is solved; interference of outlet light between pixel units is reduced; and the resolution of the LED micro display array is improved.

The invention discloses a multi-function vehicle police lamp. The multi-function vehicle police lamp comprises a base, a support, a lamp body, a driving mechanism and a control circuit. The multi-function vehicle police lamp is characterized in that a power output end of the driving mechanism is connected with the support and a power input end of the lamp body to drive the support to rotate and drive the lamp body to swing; LED (Light Emitting Diode) lamp beads and a camera are arranged inside the lamp body; a control output end of the control circuit is connected with the LED lamp beads and an input end of the camera; the LED lamp beads are controlled to emit the light which is irradiated on a target and the camera is controlled by the control circuit through the reflection of the target to perform photographing or video shooting on the target; a single light-emitting color can be adopted by all of the LED lamp beads to form a single-color continuous or flashing light-emitting structure or multiple different light-emitting colors are adopted by the LED lamp beads to form a multi-color continuous or flashing light-emitting structure through arrangement and combination. According to the multi-function vehicle police lamp, light beams can be adjusted, the irradiation range is wide, and the rapid shooting can be achieved.