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 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.

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 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 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.

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.