30results about How to "Excellent design result" patented technology

The invention discloses a gradient coil design method in a nuclear magnetic resonance system. The method comprises the following steps of: establishing a mathematical relation between a field expansion harmonic component and a cylindrical surface current distribution harmonic component under a spherical coordinate system based on a current distribution harmonic component coefficient capable of generating a specific target field through solving; combining the traditional harmonic method with a target field method; and introducing a simulated annealing algorithm to optimize and obtain the global optimum current distribution. The gradient coil design method can be used for designing a self-shielding gradient coil with cylindrical surface current distribution and optionally restraining the coil length, and ensures excellent linearity while the higher coil efficiency is achieved through comprehensively considering a plurality of design indexes. Since the gradient coil design method is optimized by utilizing a global search algorithm-simulated annealing algorithm, a global optimum design result is ensured. Meanwhile the position information of the actual distribution of a current lead is directly output by the design result, therefore, the engineering processing and manufacturing are facilitated.

The invention relates to a topological optimization design method for a cold plate liquid flow channel of an electric-electronic integration module. The method comprises the following steps: firstly establishing a finite element module, setting a growing initial point and finishing parameter initialization of self-adaption growth; then protocoling a self-adaption growth strategy of the cold plate liquid flow channel and giving out a method for determining growth direction and furcation of the cold plate liquid flow channel; finally performing step-by-step iteration growth of the cold plate liquid flow channel. By means of the topological optimization design method disclosed by the invention, optimized cold plate liquid flow channel distribution can be directly obtained; meanwhile, constraint of ground structure nodes is got rid, and the optimized cold plate liquid flow channel distribution is closer to the optimal result; an excessive demand that a designer has a lot of design experience is avoided, work of simulation, improvement and repeated simulation is prevented from being repeated, and work efficiency and design quality are obviously improved.

The invention discloses a continuous state routing algorithm of a satellite link network, which comprises the following steps: (1) registering the time of switching between a link connected state and a link unconnected state within the entire simulation time, and establishing a link state switching table; (2) searching and recording paths within the entire simulation time; (3) filtering the pathsand storing the optimal one; and (4) performing full-path integration by using the Dijkstra shortest path algorithm. The routing algorithm disclosed by the invention is different from the traditionalsatellite link network routing algorithm in that: the routing algorithm continuously records and uses the time-varying dynamic topology of the satellite link network within the entire simulation timewithout simplifying the topology into discrete static topology by dividing time intervals. The routing algorithm stores the most complete network dynamic information, thus the best routing design result can be provided; and moreover, the numerical form is simple, the paths are filtered in the path registration process, thus the workload of full-path integration is reduced.

The invention relates to an automatic design method for a nasopharyngeal carcinoma radiotherapy plan based on machine learning, and provides a method for searching for a patient optimal objective function based on Overlap Volume Histogram (OVH) data and in combination with machine learning nearest neighbor method. The method comprises establishing a template library by using existing data, searching for the most similar cases in the OVH data and the template library of newly enrolled patients by using the machine learning nearest neighbor method, and planning the radiotherapy plan of the newlyenrolled cases by using the objective function of the searched radiotherapy plan of the newly enrolled cases. The case template is searched without the need for human subjective factors, and the patient's nasopharyngeal carcinoma radiotherapy plan is automatically designed.

The invention relates to a double-wave-structure hub modeling method for a single-stage fan / air compressor. The metal blockage effect of a rotor blade row and a stator blade row of the single-stage fan / air compressor is considered in the design process of a hub. The control parameters such as the blade tip weighting function, the blade root weighting function, the maximum concave position forward movement amount, the front end magnification ratio, the rear end magnification ratio and the smoothness parameter are introduced. A double-wave structure hub shape is formed after modeling. The control parameters are adjusted through an overall optimization algorithm in the modeling process. The hub curve when the heat insulation efficiency is highest is the optimized hub curve. The end area flow of the hub after optimization is improved. The flow capacity is increased. The work range of the fan / air compressor is widened. The overall performance of the fan / air compressor is improved.

The invention discloses a method for designing tap positions of a deicing transformer of a direct current deicing device based on a graphical method. The method comprises the following steps: 1) determining voltage required for deicing of each circuit of a transformer substation; 2) drawing a two-dimensional planar graph of the voltages required for deicing of the circuits; 3) extracting an intersection section of the voltages required for deicing of the circuits; and 4) determining a tap position of a secondary side of the deicing transformer according to the intersection section of the voltages required for deicing of the circuits. The method disclosed by the invention can simplify a design process of the tap positions of the deicing transformer, quantity of the tap positions is reduced to the utmost extent, and design and manufacturing costs of the deicing transformer are reduced; and the method disclosed by the invention has the advantages of simple design process, good design results, strong portability, low quantity of designed tap positions, rapidness in implementation and convenience in application.

The invention discloses an axiomatic design and object-oriented combined analysis method. The method comprises defining function requirements of a software system; performing Z-shaped mapping transformation between a functional domain and a structural domain, and decomposing the function requirements and design parameters to determine blade design parameters; defining software composition modules according to decomposed results and a final design matrix; determining objects, attributes and operations; establishing correlations to describe relations between the objects and the operations; and building a software system structure. According to the axiomatic design and object-oriented combined analysis method, advantages of axiomatic design and an object-oriented method are fully combined, design is well completed, and ideal design results are obtained.

The invention discloses a fin type micro-channel design method of a 3D-SIP radio frequency micro-system. Firstly, carrying out discretization of a design area; initializing a finite element model according to the actual working condition and the permeability and the thermal conductivity introduced by the Darcy flow; carrying out finite element analysis according to the Darcy flow model and the convective diffusion equation; calculating a target function, a constraint function and sensitivity of the constraint function to design variables by utilizing the obtained physical field information, carrying out ceaseless iteration under MMA algorithm updating until the maximum fluid volume ratio v0 is allowed in the design process, and the maximum inlet and outlet pressure difference delta Plimitis allowed in the design process,or the number of iterations reaches the set maximum number of iterations loopmax. The method does not depend on design experience, can calculate approximate design domain physical field parameters through a finite element method by adopting a Darcy flow model in the design stage, obtains performance parameters of the chip liquid cooling device, improves design reliability, has higher design efficiency and better design result, and meanwhile reduces design cost.

First, the method picks up and saves general information in Fanout design. Then, in procedure of Fanout design, using saved information file in Fanout design carries out Fanout design in PCB design. The invention reuses excellent Fanout design, i.e. information of Fanout design is shared so as to raise efficiency of design, also obtain better result of Fanout design. In the invention, one encapsulation part is corresponding to multiple forms of Fanout design. Thus, Fanout design for one kind of encapsulation part is more flexible.

The invention relates to the field of aerospace primary load bearing thin-walled component design and provides a gradient distribution type rib barrel shell structure. According to the gradient distribution type rib barrel shell structure, gradient distribution type ribs are rationally arranged in a barrel shell stiffness mutation area and other vulnerable areas, so that the overall stiffness of the structure is more evenly distributed, extension of local buckling deformation of the stiffness mutation area and the other vulnerable areas is effectively restrained, the stress concentration destruction phenomenon is reduced, and the bearing capacity of the barrel shell structure is ultimately improved; the number, the size and the layout information of the gradient distribution type ribs are determined according to the diameter, the height and the thickness of the barrel shell structure; the reinforcing efficiency of the stiffness mutation barrel shell structure can be remarkably improved, and the barrel shell structure is simple in process and can be produced on a large scale.

A method for optimizing layout design of cooling water jacket channel of a CNC machine tool spindle is provided. The method comprises the following steps: the equivalent model is constructed first, and then the finite element model of the base structure is initialized, and the flexible growth unit is constructed, the finite element analysis is carried out, the adaptive growth is carried out, growth competition and configuration reconstruction are iterated under the updating of an MMA algorithm until the material consumption reaches the maximum value beta0 set when initialization. The inventioncan obtain the performance parameters of the water jacket through the finite element method in the design stage, improves the reliability of the design, has higher design efficiency compared with thetraditional design, can obtain better design results, and simultaneously reduces the design cost.

The invention relates to the field of aerospace primary load bearing thin-walled component design and provides a gradient distribution type rib barrel shell structure. According to the gradient distribution type rib barrel shell structure, gradient distribution type ribs are rationally arranged in a barrel shell stiffness mutation area and other vulnerable areas, so that the overall stiffness of the structure is more evenly distributed, extension of local buckling deformation of the stiffness mutation area and the other vulnerable areas is effectively restrained, the stress concentration destruction phenomenon is reduced, and the bearing capacity of the barrel shell structure is ultimately improved; the number, the size and the layout information of the gradient distribution type ribs are determined according to the diameter, the height and the thickness of the barrel shell structure; the reinforcing efficiency of the stiffness mutation barrel shell structure can be remarkably improved, and the barrel shell structure is simple in process and can be produced on a large scale.

The invention relates to the technical field of electrical engineering, and discloses a gallop eliminating and ice melting transformer design method considering wide voltage regulation and fine and adjustable current. The method comprises the following steps: determining the rated current of a secondary side of the transformer according to the maximum value in gallop eliminating and ice melting reference current of all to-be-ice-melted line conductors; according to the gallop eliminating and ice melting reference current, the maximum ice melting current and the resistance parameters of all the to-be-ice-melted line conductors, calculating the highest ice-melting direct-current voltage and the lowest ice-melting direct-current voltage required by a direct-current ice melting device; determining the number of gears of the transformer according to the ratio of the highest ice-melting direct-current voltage to the lowest ice-melting direct-current voltage; designing the output voltage of each gear of the ice melting transformer according to the fact that the current in the rectifier series-parallel connection and ice melting mode combined mode is equivalent to the current of different transformer gears in the rectifier series connection and ice melting mode two-phase series connection mode. Therefore, the ice melting currents corresponding to different gears are not crossed and overlapped, and the equivalent output voltages of different gears are not crossed and overlapped.

The invention provides a design method of an airborne computer board level low DC Impedance coplanar electromagnetic band-gap power supply layer. The equivalent model is constructed first, then initialization of the finite element model of the base structure is performed, then the flexible growth unit is constructed, then finite element analysis is performed, then adaptive growth is performed, andgrowth competition and configuration reconstruction are iterated under the updating of the MMA algorithm until the material consumption reaches the maximum value beta0 set in initialization. The performance parameters of the power supply layer can be obtained through the finite element method in the design stage so as to enhance the reliability of the design, have higher design efficiency than that of the conventional design, obtain better design result and reduce the design cost.

The invention relates to a parameter design method for a phase-shifted full-bridge converter based on a ZVS load range, and the method comprises the steps: calculating the turn ratio n of a primary side to a secondary side of a transformer according to the gains of an input voltage Vin and an output voltage Vo and the maximum allowable duty ratio loss Dloss _ max of a system; calculating the output filter inductance L0 according to a volt-second balance principle of the output filter inductance L0 and the current ripple coefficient alpha of an output inductor; constructing a function lambda1(Lr, Dloss _lambda) about the ZVS soft switching range lambda and the duty ratio loss Dloss_lambda under the lambdaIo load condition according to the volt-second balance principle of a resonant inductorLr; according to a hysteresis arm soft switching realization condition, taking energy stored by the resonant inductor Lr equals energy required for completing current conversion by a hysteresis arm parallel capacitor Clag as a critical condition, and constructing a function lambda 2 (Lr, Dloss _ lambda); and solving a set M (lambda, Lr, Dloss _ lambda) of all points satisfying the critical soft switching condition lambda 1 (Lr, Dloses _ lambda) = lambda 2 (Lr, Dloses _ lambda), and determining an optimal solution (lambda, Lr, Dloss _ lambda). According to the method, circuit parameters of thephase-shifted full-bridge ZVS converter can be screened and designed simply and visually.

The invention relates to the technical field of electrical engineering, and discloses a design method for a dance-dispelling and ice-melting transformer that takes into account both wide voltage regulation and finely adjustable current. The method includes: determining the rated current of the secondary side of the transformer according to the maximum value of the deicing and melting reference currents of all wires to be deiced; Calculate the highest and lowest ice-melting DC voltage required by the DC ice-melting device; determine the number of transformer gears according to the ratio between the highest ice-melting DC voltage and the lowest ice-melting DC voltage; The current is equivalent to the current of different transformer gears unified in the rectifier series and ice-melting two-phase series mode, and the output voltage of each gear of the ice-melting transformer is designed so that the ice-melting currents corresponding to different gears do not overlap and are different. The equivalent output voltages of the gears have no cross-overlap.

A finned microchannel design method for 3D‑SIP radio frequency microsystems. Firstly, the design area is discretized, and the finite element model is initialized according to the actual working conditions and the permeability and thermal conductivity introduced by Darcy flow. Perform finite element analysis on the flow model and convection-diffusion equation, and then use the obtained physical field information to calculate the objective function, constraint function and the sensitivity of the constraint function to the design variables, and iterate continuously under the update of the MMA algorithm until it meets the requirements allowed in the design process. The maximum fluid volume ratio v 0 And the maximum inlet and outlet pressure difference ΔP allowed in the design process limit , or the number of iterations reaches the set maximum number of iterations loopmax, the present invention does not rely on design experience, and can use the Darcy flow model in the design stage to calculate the approximate physical field parameters of the design domain through the finite element method to obtain the chip liquid cooling device Performance parameters improve design reliability, have higher design efficiency, better design results, and reduce design costs.

The invention discloses a discrete optimization design method for connecting structures. The method mainly comprises the following steps: creating a collision finite element model; and then, determining an optimization target, constraint conditions and design variables to be optimized, and creating a three-level orthogonal table; obtaining target response values through numerical simulation calculation, and obtaining correction response values; and finally, reasonably selecting an optimal solution through a comprehensive evaluation value. The method disclosed by the invention can be used for solving the defects that the direct problem time dispatched by a genetic algorithm is overmuch, the response surface created by an approximation model method is a continuous space, the precision is low, and the like, and the discrete optimization design method is high in precision and efficiency and is particularly suitable for discrete optimization design problem of connecting structures with various variables and various levels. The method disclosed by the invention can be further used for reasonably guiding the design of the connecting structures to improve the performance of the connecting structures.

The invention provides a design method of an airborne computer board level low DC Impedance coplanar electromagnetic band-gap power supply layer. The equivalent model is constructed first, then initialization of the finite element model of the base structure is performed, then the flexible growth unit is constructed, then finite element analysis is performed, then adaptive growth is performed, andgrowth competition and configuration reconstruction are iterated under the updating of the MMA algorithm until the material consumption reaches the maximum value beta0 set in initialization. The performance parameters of the power supply layer can be obtained through the finite element method in the design stage so as to enhance the reliability of the design, have higher design efficiency than that of the conventional design, obtain better design result and reduce the design cost.

The invention provides a wing rib driving mechanism of a rotary steering drilling tool, which is characterized of comprising the following steps of: 1) installing the rotary steering drilling tool which comprises three wing rib driving mechanisms, wherein the wing rib driving mechanisms comprises liquid cylinders, wing ribs and trolley idler wheels; the pistons of the liquid cylinders are connected with the shafts of the trolley idler wheels; the fixed ends of the wing ribs are fixed on the pistons by means of hinging and supporting, and the other ends of the wing ribs are free ends; and the free ends are tangent with the trolley idler wheels by inclined planes; 2) obtaining the well wall sticking force S of the wing ribs and the journey X of the trolley idler wheels according to the driving force P of the liquid cylinders, the inclined angle a of the inclined planes and the friction coefficient f of the trolley idler wheels; 3) optimizing the wing ribs well wall sticking force S of the wing ribs and the journey X of the trolley idler wheels to obtain the best inclined angle a and complete design. The method and the mechanism can be used for designing and analyzing the wing rib driving mechanisms of the various rotary steering drilling tools.

The invention discloses a graphic method-based method for designing the stalls of an ice-melting transformer of a DC ice-melting device. The steps include: 1) determining the ice-melting demand voltage of each line in a substation; 2) drawing a two-dimensional map of the ice-melting demand voltage of each line 3) Extract the intersection section of the ice-melting demand voltage of each line in the two-dimensional plan; 4) Determine the gear position of the secondary side of the ice-melting transformer according to the intersection section of the ice-melting demand voltage of each line. The invention can simplify the design process of the ice-melting transformer stalls and reduce the number of stalls as much as possible, reduce the design and manufacturing costs of the ice-melting transformer, and has the advantages of simple design process, excellent design results, strong portability, small number of designed stalls, Realize the advantages of fast and convenient use.

The invention discloses a high-gain dual circularly polarized antenna structure based on metasurface loading, which solves the shortcomings of traditional microstrip patch antennas, such as low radiation gain and limited bandwidth, and the invention includes two radiation units with the same shape , the radiation unit includes a metasurface structure 1 , a patch group, a multilayer dielectric substrate and a feed network 9 . Under a compact caliber, the present invention introduces a 4×4 square ring-shaped metasurface structure to improve the gain of the antenna. It is applied in high-gain, high-isolation systems such as identification (RFID).

The invention provides an adjustable LCL filter optimization design method based on fuzzy control T-type three-level PCS. The method comprises the steps: replacing the AC side inductor of an LCL filter with the leakage inductor of an AC side isolation transformer in order to reduce the size of the LCL filter as much as possible; and establishing a filter model, solving a transfer function and establishing a function clear limiting condition, designing a parameter calculation module through the limiting condition, calculating parameters of an LCL filter by the parameter calculation module according to collected correlation values, determining actual parameters by combining the parameters with actual empirical values, and designing a filter capacitor and a filter inductor which are adjustable capacitors and inductors. The parameters of the filter can be adjusted to a certain extent according to the change of actual output power, and the network access electric energy quality can be further improved. The design method is simple, the purpose is clear, the complex filter design process is simplified, the filter parameters can be further optimized according to the output power change, the network access harmonic content is further reduced, and meanwhile the loss is reduced.

The invention provides an optical simulation device of a backlight source. The optical simulation device comprises a first bearing unit, a second bearing unit, a distance measurement unit and a control unit. The first bearing unit is used for placing a light source, and the second bearing unit is used for placing a light guide plate. The distance measurement unit is used for obtaining a distance between the light source and the light guide plate. The control unit is connected with the first bearing unit and the second bearing unit and used for controlling relative position between the first bearing unit and the second bearing unit. The optical simulation device of the backlight source adjusts the distance between the light source of the backlight source to be simulated and the light guide plate by controlling the first bearing unit and the second bearing unit, obtains the distance between the light source at the corresponding position and the light guide plate through the distance measurement unit, can actually simulate the optical effect of backlight source products, accordingly can perform actual optical simulation before the products are manufactured, and performs actual verification to the actually simulated backlight source to be developed.

The invention relates to a parameter design method of a phase-shifted full-bridge converter based on a ZVS load range, comprising: according to the input voltage V in with the output voltage V o gain, and the system allows the maximum duty cycle loss D loss_max , to calculate the primary and secondary turns ratio n of the transformer; according to the output filter inductance L 0 The principle of volt-second balance, and the output inductor current ripple coefficient α, calculate the output filter inductor L 0 ; According to the volt-second balance principle of the resonant inductance Lr, the structure is about the ZVS soft switching range λ and at λI o The duty cycle is lost under load condition D loss_λ function λ 1 (L r ,D loss_λ ); according to the realization condition of lagging arm soft switching, take the energy stored in the resonant inductor Lr and the lagging arm parallel capacitor C lag The energy required to complete the commutation is equal to the critical condition, and the constructor λ 2 (L r ,D loss_λ ); the solution satisfies the critical soft-switching condition λ 1 (L r ,D loss_λ )=λ 2 (L r ,D loss_λ ) set M(λ,L) of all points r ,D loss_λ ), determine the optimal solution (λ,L r ,D loss_λ ). This method can realize the simple and intuitive screening and design of the circuit parameters of the phase-shifted full-bridge ZVS converter.

The invention relates to a double-wave-structure hub modeling method for a single-stage fan / air compressor. The metal blockage effect of a rotor blade row and a stator blade row of the single-stage fan / air compressor is considered in the design process of a hub. The control parameters such as the blade tip weighting function, the blade root weighting function, the maximum concave position forward movement amount, the front end magnification ratio, the rear end magnification ratio and the smoothness parameter are introduced. A double-wave structure hub shape is formed after modeling. The control parameters are adjusted through an overall optimization algorithm in the modeling process. The hub curve when the heat insulation efficiency is highest is the optimized hub curve. The end area flow of the hub after optimization is improved. The flow capacity is increased. The work range of the fan / air compressor is widened. The overall performance of the fan / air compressor is improved.

A cooler structure optimization method suitable for an arc wind tunnel is realized by the following steps: (1) establishing a cooler structure analysis model for a current cooler structure to be optimized; (2) calculating the cooler structure analysis model by adopting an engineering calculation method, and determining the heat exchange amount of the current cooler structure; Judging whether the heat exchange amount meets the design requirement or not, if not, returning to the step (1), re-establishing the cooler structure analysis model, and if yes, turning to the step (3); (3) calculating the flow resistance of the cooler according to the current cooler structure analysis model, judging whether the flow resistance meets the design requirement or not, if not, returning to the step (1), and re-establishing the cooler structure analysis model; Otherwise, the current cooler structure meets the design requirement.

The invention discloses a continuous state routing algorithm of a satellite link network, which comprises the following steps: (1) registering the time of switching between a link connected state and a link unconnected state within the entire simulation time, and establishing a link state switching table; (2) searching and recording paths within the entire simulation time; (3) filtering the pathsand storing the optimal one; and (4) performing full-path integration by using the Dijkstra shortest path algorithm. The routing algorithm disclosed by the invention is different from the traditionalsatellite link network routing algorithm in that: the routing algorithm continuously records and uses the time-varying dynamic topology of the satellite link network within the entire simulation timewithout simplifying the topology into discrete static topology by dividing time intervals. The routing algorithm stores the most complete network dynamic information, thus the best routing design result can be provided; and moreover, the numerical form is simple, the paths are filtered in the path registration process, thus the workload of full-path integration is reduced.

The invention relates to a topological optimization design method for a cold plate liquid flow channel of an electric-electronic integration module. The method comprises the following steps: firstly establishing a finite element module, setting a growing initial point and finishing parameter initialization of self-adaption growth; then protocoling a self-adaption growth strategy of the cold plate liquid flow channel and giving out a method for determining growth direction and furcation of the cold plate liquid flow channel; finally performing step-by-step iteration growth of the cold plate liquid flow channel. By means of the topological optimization design method disclosed by the invention, optimized cold plate liquid flow channel distribution can be directly obtained; meanwhile, constraint of ground structure nodes is got rid, and the optimized cold plate liquid flow channel distribution is closer to the optimal result; an excessive demand that a designer has a lot of design experience is avoided, work of simulation, improvement and repeated simulation is prevented from being repeated, and work efficiency and design quality are obviously improved.