604 results about "Design cycle" patented technology

The invention relates to a turbine disk probability failure physical life predicting method based on Bayes information update, which comprises the following steps that 1, failure physical information of a turbine disk is determined in a reliability analyzing method based on physics of failure according to the structural characteristics of the aircraft engine turbine disk; 2, the failure physical information of the aircraft engine turbine disk obtained in step 1 and the existing failure information obtained by maintenance data statistics are analyzed in an FTA (failure tree analysis) /FMECA (failure mode, effects & criticality analysis) method to obtain the main failure mode and the failure position of the turbine disk, and uncertain factors and inaccurate data of the turbine disk facing whole life cycle are collected and cleared up; and 3, a failure physical life predicting model of the aircraft engine turbine disk is established according to the main failure mode and the failure position of the turbine disk obtained in step 2. The method disclosed by the invention has the beneficial effects that the design cycle of the aircraft engine turbine disk can be obviously shortened, the development cost is reduced, and the life reliability of the aircraft engine turbine disk can be obviously improved.

Techniques for organizing and displaying timing data derived from an EDA tool are provided that allows users to easily extract, analyze, and manipulate portions of the timing data relevant to particular user requirements. Relevant portions of signal waveforms are displayed on an interactive graphical user interface (GUI). Time points on the waveforms are marked with pointers so that users can easily visualize the relationships between different signals. A user can also extract relevant timing data from the EDA tool by manipulating the GUI. Manipulating and understanding circuit design requirements affects all of the design cycle and the quality of the final result from an EDA tool. A user can visualize all aspects of timing analysis on the GUI, such as clock skew, and the setup/hold relationship. A data entry approach is provided that can be used for natural and intuitive manipulation of various timing relationships.

The invention discloses an intelligent pipeline arrangement optimization method and system based on a differential evolution algorithm. The method includes the steps of conducting mathematical modeling on a pipeline to be arranged and arrangement space so as to determine an arrangement object, the constraint condition and the evaluation criteria, coding the arrangement object through polar coordinates and posture vectors, conducting optimization solution on a pipeline arrangement optimization mathematical model according to the differential evolution algorithm, and conducting constraint condition verification and arrangement adjustment on the arrangement optimization scheme obtained through the solution so as to obtain a final arrangement scheme. By means of the intelligent pipeline arrangement optimization method and system based on the differential evolution algorithm, the design cycle can be greatly shortened, optimization performance can be enhanced, the purpose of arranging pipelines on a large scale within limited time can be achieved, and the method and the system have the advantages of being short in arrangement design time, high in optimization accuracy, capable of quantitatively evaluating the arrangement scheme and the like.

A method and system are disclosed that utilize the expressiveness of hardware description languages for automatically adjusting counting rates of instrumentation within a simulation model of a digital circuit design, during simulation of said digital circuit design. According to the present invention a design entity that will be incorporated into a simulation model of a digital circuit design is described utilizing a hardware description language. The design entity operates, during simulation, in conformity with a design cycle that consists of a multiple of a simulator cycle. Next, an instrumentation entity is described utilizing the same hardware description language. The description of the instrumentation entity contains logic to detect occurrences of a count event that occurs in conformity with the design cycle during simulation. Thereafter, an instrumentation logic block associated with the instrumentation entity is automatically generated and utilized for counting occurrences of the count event detected by the instrumentation entity. Finally, the design cycle is encoded within the instrumentation entity, such that the output logic block is automatically adjusted to count in conformity with the design cycle.

The present invention provides a part management system that facilitates an automated process for the design or electronic components such as printed circuit boards. Manufacturing rules can be stored with part data to ensure that the manufacturing rules are considered throughout all aspects of the design process. A part research engine is provided that performs various functions to aid a designer in selecting parts to be included in the design of a component. The part research engine performs a global part number search. Entering a full or partial part number results in list of part numbers from which selections can be made. The part research engine also can perform a comparative part search. This function is used for finding an equivalent device within and across different manufacturers based on top-level parameters such as the density, package type, I/O requirements, and other factors. Users can select multiple components from the competitive part list for comparing them side-by-side using a direct compare feature of part research engine. A unified part file, part repository and database solve the problems of fragmented part libraries, use of generic part data, and lack of manufacturing rules. A unified part file is used to store part data required to support a suite of design and validation activities throughout the design cycle including the schematic (logical) design, PCB design and layout, thermal analysis, signal integrity and BMI analysis, and manufacturing analysis. The part data represent a manufacturer specific part identified by the manufacturer part number (MPN) instead of a generic part. Upon selection of a part for the schematic design, engineers of various disciplines can start investigating or preparing for the effect of the part selection on various aspects of the design while purchasing people can check pricing and availability of the part.

The invention discloses a method for the layout optimal design of a multi-assembly structure system, which is used for solving semi-analytical sensitivity of geometric parameters in the layout optimal design of a multi-assembly structure system. The method comprises the following steps of: dividing a finite element model of the multi-assembly structure system into three parts: structure lattice, assembly lattice and transition lattice; respectively evaluating influences of different geometric parameter perturbations on the three parts of lattices as well as a rigidity matrix and a quality matrix thereof to obtain the semi-analytical sensitivity of the rigidity matrix and the quality matrix; and further obtaining the sensitivity of various design indexes by derivation. Compared with the finite differential method for the traditional layout optimal design, the semi-analytical method of the invention effectively avoids the finite element solving process after the geometric parameter perturbations are updated, saves the time for sensitivity analysis and optimal design, shortens the cycle of the layout optimal design of the multi-assembly structure system, and enhances design efficiency.

The invention discloses a magnetic-structural coupling simulation method for a quartz flexible accelerometer based on finite elements, which comprises the following steps: 1,selecting finite element units; 2, building a material model library, which comprises the actions of defining a unit system and inputting the material attribute of each component of the accelerometer; 3, establishing a geometrical model of the accelerometer, which comprises structure simplification and ellipsis, concatenation simplification, geometrical model establishment and attribute assignment; 4, establishing a finite element model of the accelerometer; 5, exerting constraints and loads which comprise magnetic field constraints, structural constraints, constant temperature loads, current density loads and acceleration loads; and 6, carrying out transient magnetic structure coupling simulation on the accelerometer. The method disclosed by the invention has the advantages that both the material nonlinear variation of each component of the accelerometer and the magnetic-structural coupling function are taken into consideration, therefore, on one hand, the optimal design can be performed on the structure of the accelerometer; and on the other hand, the variation model of performance parameters can be established based on the simulation results, and the design cycle and design cost of the quartz flexible accelerometer can be reduced.

The invention discloses a full customization method and system for a digital-analog hybrid chip asynchronous circuit. the method includes: based on a process for determining design indexes based on adigital-analog hybrid chip, establishing a digital unit library meeting a preset condition, wherein the number of the digital units contained in the digital unit library is minimum; designing a circuit schematic diagram of the digital-analog hybrid chip based on a digital unit library and a component library; and performing automatic layout and wiring on the digital circuit module of the asynchronous circuit structure by adopting a synchronous circuit automatic layout and wiring tool to obtain a layout, and performing circuit analog simulation on the layout hierarchical netlist containing parasitic parameters and the simulation model after determining that the layout meets a design rule and the layout is consistent with a circuit schematic diagram. According to the invention, the design cycle and workload of establishing the digital unit library are reduced by establishing the digital unit library with the least number of digital units; Based on a digital cell library, a synchronous circuit automatic layout and wiring tool is adopted to perform automatic layout and wiring on the digital circuit module of the asynchronous circuit structure so as to improve the wiring efficiency.

The invention discloses microprocessor function verifying equipment. The equipment comprises an instruction set simulator, a comparator, a monitor, an input interface and an RTL (Register Transfer Language) module, wherein the instruction set simulator is used for executing a test program and generating a periodical reference data file; the comparator is used for reading the periodical reference data file from the instruction set simulator; the input interface is used for loading the test program into a memory cell of a to-be-verified design; the monitor is used for capturing a to-be-verified signal in to-be-verified design simulation and outputting to the comparator; the comparator is used for comparing whether reference data in the periodical reference data file is consistent with the to-be-verified signal or not; and the RTL module is used for reading part internal signals of the to-be-verified design from the to-be-verified design cycle by cycle to decide whether the behavior of the to-be-verified design is consistent with the behavior of the RTL module or not. The equipment disclosed by the invention has the advantages that the technical problem that the function inspecting efficiency of the to-be-verified design is low in the prior art is effectively solved, so that the efficient and fast function inspection is realized and the verifying efficiency is increased eventually.

System-on-chip (SoC) designs include large amounts of interconnected intellectual property blocks and standard-cell logic using complex bus fabrics. Today SoC design-closure that validates design targets of area, timing, congestion and power constraints is accomplished post routing as over 80% of validation problems are due to global-interconnect. A method is disclosed that allows the designers to achieve global design-closure and physical topology constraints, early in the design cycle, at much higher levels of abstraction. In particular, logic hierarchy of the design is converted into a physical hierarchy of functional-related clusters of locally-connected logic. The clusters and inter-cluster global connections can be refined to meet design constraints in order to generate a top-level floor-plan in the form of library and constraint files. Using the results of this top-down global design-closure method the designers can use the generated floor-plan to guide downstream tools to achieve predictable and correlatable design implementation.

The invention discloses a rapid evaluation and optimization method for the wind field adaptability of a wind generating set based on sector distribution. By building a wind resource parameter combination mode, sector control strategies are built, a wind generation set operation information database is built, interpolation calculation of the fatigue load and the generation power of the wind generation set is conducted, and the wind field adaptability is rapidly evaluated through an optimization algorithm. According to the characteristic that sector distribution of wind resource parameters is different, the corresponding sector control strategies are formulated and used as the input conditions for simulation of the wind generating set; and the wind generating set operation information database is built in a simulating mode in advance, and the optimization algorithm is adopted, so that rapid evaluation and optimization of the loads and the generating capacities of all machines in a wind field are achieved. The fatigue loads and the annual generating capacities of the machines in the wind field at the early design stage can be reasonably predicted, the design period is greatly shortened, the development cost of the wind field is saved, and fine design of the wind field is achieved.

The invention discloses a transmission line design method based on GIS and Floyd algorithm. The design method comprises the following steps: firstly, processing environmental impact data of an area where a line is predicted to pass and gridding the researched area, secondly, setting up a grid rating model in a design area by utilizing a GIS technology according to the geography information of the line design region, thirdly, connecting a start point and an end point in grids, analyzing intersected grids in a connection line and the grids, and finding out grids where the connection line passes through and the line is unsuitable to build, fourthly, figuring out directed weighted graphs among all nodes through the Floyd algorithm and constructing a weight matrix, and fifthly, adjusting the number of the nodes allowed to pass by the line, acquiring the weight matrix at initial state and a weight matrixes corresponding to the number of different intermediate nodes, and acquiring the line generated when the total path length is shortest. The transmission line design method utilizes a dynamic programming mathematical method, and analyzes spatial data in real time through a computer, so as to improve the accuracy and processing efficiency of line planning, reduce the workload, and shorten the design cycle.

The invention discloses a layout design method, a layout design system and a manufacture method of an integrated circuit. The design method comprises the steps as follows: designing an initial topological structure of the integrated circuit and an initial size of each transistor of the integrated circuit, and obtaining a preset numerical range of a relevant parameter of a layout effect of each transistor of the integrated circuit; performing pre-simulation to the initial topological structure of the integrated circuit, the initial size of each transistor and relevant parameter of the layout effect of each transistor so as to obtain a target layout design parameter which meets a preset yield rate, wherein the target layout design parameter comprises a target topological structure of the integrated circuit, a target size of each transistor of the integrated circuit, and a target numerical value of the relevant parameter of the layout effect of each transistor of the integrated circuit; designing a target layout of the integrated circuit meeting preset performance according to the target layout design parameter. The layout design method, the layout design system and the manufacture method of the invention ensure the yield rate for manufacturing the integrated circuit and improve the condition that the design cycle is long while designing current layout.

The invention belongs to the field of aviation undercarriages and particularly relates to a ground load determination method of a multi-fulcrum airplane. According to the ground load determination method of the multi-fulcrum airplane, by means of equivalent conversion, a static indeterminacy calculation of the multi-fulcrum airplane is converted into a static determinacy calculation, further uneven distribution coefficients of multi-strut loads are introduced, load boundary values in every structural design of undercarriages can be effectively guaranteed, therefore, certain guiding functions are provided for optimizing the structural designs of the multi-strut undercarriages and improving the accuracy of the design of the multi-strut undercarriages. Besides, the calculation idea of the ground load determination method of the multi-fulcrum airplane is clear and rigorous, the calculation method is reliable and easy to comprehend and master, so that the ground load determination method of the multi-fulcrum airplane has a broad application prospect in engineering design of the multi-strut undercarriages. During the actual usage, the quantity of the research trials of the loads of the multi-strut undercarriages can be reduced by applying the ground load determination method of the multi-fulcrum airplane, so that obvious advantages of saving the design cost and shortening the design cycle of the multi-strut undercarriages can be achieved.

Provided herein are methods and systems for managing and using metadata in connection with data integration in an enterpirse computing environment. An integrated, platform-independent approach to metadata management may allow enterprise-wide access to data integration services and underlying data, and facilitate reuse and redesign of tools and jobs in the data integration environment. Tools are providing for managing metadata, including maintaining versioned metadata models that may be branched and merged during a design cycle, and dynamically implemented across the enterprise. The platform-independent approach may facilitate varied uses including implementations in heterogeneous hardware and software computing environments.

The invention relates to a template-based integrated design platform construction method, which belongs to the technical field of integrated design environments. In the construction method, centered on templates, various design rules, design experiences, design algorithms and the like are packaged into the templates to generate the single templates, and then the independent templates are combined into combined templates by a flow parser, thereby realizing knowledge reuse and quick design and provide simple means for the knowledge integration, flow integration, data integration, algorithm integration, specification integration, application integration and the like in an engineering and product design process to fulfill the aims of reducing the design cost and shortening the development cycle. A platform of the invention can be widely applied to the digital integrated design of various industrial products, effectively improve the design efficiency, reduce the design cost, reduce the workload of designers and shorten the design cycle, and has vast market prospect and high application value.

Disclosed is a structural dynamic design method for a high-pressure rotor of an aircraft engine. The relationship between high-pressure rotor model design parameters and rotor vibration characteristics is determined, so that the design method and criterions are provided for dynamic design of the high-pressure rotor, and the method is of great guiding significance to the design of the high-pressure rotor of the aircraft engine. The method includes: establishing a dynamic model and a dynamic equation of the high-pressure rotor to obtain a nondimensionalization characteristic equation; introducing an equivalent critical speed, and determining a two-order critical speed range of a high-pressure rotor system according to the equivalent critical speed; changing a conventional equilibrium amount configuration method by configuring residual disequilibrium amount phases; configuring a ratio of rotor pole rotation inertia to mass center rotation inertia in design according to a specific design objective; establishing configuration criterions for a rotor bearing stiffness ratio. A conventional design process is changed, structural dynamic active design of the high-pressure rotor is realized, the design process is optimized beneficially, design cycle is shortened, and the method has important construction value.

The invention provides a type selection design method of a main controllable pitch propeller used for a ship, belonging to ship design and manufacture field. According to the existing parameters of a hull, a host machine and a gearbox, the diameter H of a hub is selected; furthermore, the blade diameter D, the blade area ratio EAR, the pitch ratio P/D, the efficiency Eta, and the blade number z of the controllable pitch propeller are determined according to the maps of fixed pitch propeller series; the mass and the movement inertia of the controllable pitch propeller blade are determined according to experimental formula; strength checking and bearing capability checking to the hub are carried out, and the application performance requirement of the controllable pitch propeller is well met. The invention obtains the type selection design proposal, with the advantages of good safety and reliability, small design fund investment, simplified program, short design period, good system performance, convenient data processing, convenient management with computers, exact and reliable data, smaller error compared with post-design, little changes on the parameters determined by the type selection design in the process of the post-technology design of the controllable pitch propeller, convenient adjustment, thus simplifying the post-design flow, shortening the period and improving the efficiency.

The invention provides a multi-disciplinary integrated design optimization system for a carrier rocket. The multi-disciplinary integrated design optimization system comprises a system analysis module, an optimization model module and an optimization solving module, wherein the three modules are carried out according to a sequence in a multi-disciplinary integrated design optimization process of the carrier rocket, namely the system analysis module is firstly executed, then the optimization model module is executed and the optimization solving module is lastly executed. A multi-disciplinary integrated design optimization method for the carrier rocket comprises the following three steps: step 1, establishing the system analysis module of the carrier rocket; step 2, establishing a multi-disciplinary optimization model of the carrier rocket; step 3, optimizing and solving. According to the multi-disciplinary integrated design optimization system and method for the carrier rocket, synergistic effects generated by mutual effects of various disciplines are utilized sufficiently to obtain the whole optimal solution of a carrier rocket system; the design period is shortened and the cost is reduced.

The invention discloses a design method of a hot-rolling strip steel rolled cooling line. The design method comprises the following steps of: determining the header arrangement mode of the cooling line; calculating the upper header flow rate; calculating the lower header flow rate; calculating the side-spraying header flow rate; calculating the hot flow density; calculating the cooling capability of a single upper header and a single lower header; calculating the total water quantity; checking the flow rate; drawing a cooling line equipment arrangement diagram; simulating the cooling process; and generating the design information report. In the design, the method of combining the rolling procedure and the equipment structure is adopted, so the whole design process is very clear. The design method can adopt the computer program for calculation, so the design period is short. The design method adopts the calculation method of combining the theoretical model and the field actual data, so the equipment parameter calculation is accurate. The design method has the advantages that the calculation result practicability is fully considered, and the complete one-package service can be provided from the cooling line design and the process calculation to bidding document making and the like.