2223 results about "Development period" patented technology

The invention relates to a method and a system for a semi-physical simulation test of visual unmanned aerial vehicle flight control and belongs to the technical field of visual system simulation. The method includes building a dynamic model of an unmanned aerial vehicle system, initializing the dynamic model, enabling an unmanned aerial vehicle to fly along the track provided by the ground, feeding flight rudder quantity information to the dynamic model to be updated, driving a three-dimensional model of the unmanned aerial vehicle through the updated dynamic model to conduct simulation and outputting simulation image and data in real time. A system based on the method is further provided. The method and the system provide effective ways and development environment for design, experiments and verification of the flight control law, have the advantages of being simple, flexible, quick, vivid and real-time, improve simulation efficiency of a flight control system, reduce test risk and test cost of the unmanned aerial vehicle and shorten development period.

A system for planning and managing a software development project uses an extreme programming (XP) process and includes a graphical user interface (GUI) for displaying graphs and for entering, displaying and modifying underlying planning data. In one embodiment, the GUI includes first, second and third windows. The first window displays bar graphs reflecting both estimated development work and available resources (developer hours) for working on development. The second window displays bar graphs representing both estimated testing work and available resources for working on testing. The third window displays underlying data (e.g., project components and assignment of project components to scheduled development periods). A project manager may use the third window to adjust underlying data in order to better balance work and resources displayed in the first and second windows. Additional underlying data (individual developers, assigned hours, estimates of work on individual project components, etc.) may be displayed in other windows.

The invention discloses a quick prototype design method for gas path fault diagnosis for an aeroengine. The quick prototype design method comprises the following steps of: building an adaptive model of the engine; designing a gas path fault diagnosis logic in the full service life of the aeroengine, and implementing abnormal monitoring and gas path performance on-line estimation; and designing a quick prototype design platform for gas path fault diagnosis for the engine, and checking abnormal monitoring and gas path performance on-line estimation functions of the platform. The adaptive model of the engine is built by a compound interference method; an engine on-board adaptive model is used for estimating performance parameters; an engine adaptive base line model is used for monitoring abnormities and performs off-line period updating; and the quick prototype design method is used for checking the engine gas path fault diagnosis logic. The invention also discloses a corresponding quick prototype design platform. The method and the platform are relatively high in capacity of monitoring abnormities and estimating the performance in the overall service life of the engine and have great significance for shortening the development period and reducing the test risk and the test cost.

The invention relates to a data management system for vehicle products and a method thereof, wherein the system comprises a user interface layer, a communication layer, an application logic layer, a main sever layer and a database layer, the use interface layer is connected with the database layer through the communication layer, the application layer and the main sever layer in sequence. The method comprises a graph document management and processing operation, a vehicle production structure management operation, a right management operation and a data query processing operation. By using the data management system for vehicle products and the collaborative design method thereof, the collaborative design of the vehicle development process is jointly achieved, and the real-time collaboration in the CAD environment and data sync update of associated parts are creatively achieved to effectively reduce the development period of the vehicle styles, and increase design quality, therefore the development period of the vehicle styles is reduced by about 20%, and the design alteration is reduced by over 30%, then, the system has simple and practical structure, fast and convenient usage process, high-efficient development design, stable and reliable working performance, and wider applicable range.

The invention discloses a low-power wireless data acquisition system comprising a data processing server, a data acquisition node and a ZigBee wireless personal area network, wherein the data acquisition node comprises at least one sensor module and a wireless transmit-receive module, the sensor module takes charge of acquiring data, and the wireless transmit-receive module takes charge of transmitting the acquired data; and the ZigBee wireless personal area network also comprises at least one data convergence node with a ZigBee terminal, takes charge of receiving the acquired data from the data acquisition node, packs into ZigBee network data and then transmits to a ZigBee router node or a ZigBee coordinator node. The invention enables the whole system to achieve ideal cluster tree topology under an easiest condition and have lower powder consumption relative to the traditional wireless network applying the cluster tree topology and omits the secondary development of a network layer of a ZigBee protocol by combining a point-to-point wireless transceiver with the ZigBee wireless personal area network, thereby greatly shortening the development period.

A crack growth rate and crack growth life prediction method for a mechanical structure belongs to a calculation method for fatigue crack growth rate and crack growth length of the mechanical structure. At first, a relationship between S-N and P-S-N curve expressions (power function form) and a crack growth rate curve expression (Paris formula) is built up in the method. A determination method of the crack growth rate under the conditions of block spectrum load, overload hysteresis load and random load is proposed. And a determination method of Paris curve parameters is provided when the S-N and P-S-N curves cannot be expressed in power function form. And a method for improving the prediction precision of the crack growth rate and the crack growth life is proposed. The S-N and P-S-N curves are used by the method to predict the crack growth rate and the crack growth life. Therefore, the method has the advantages of little dependence on tests and high precision and can shorten the product development period and save much manpower, material resources and financial resources.

The invention provides a wearable computer main board with variable functions, which is designed in view of variable application requirements of a wearable computer and the defects of single function, performance upgrade and function extension of the existing technical realization methods. Chips such as FPGA/CPLD/FPAA, and the like with overprogram characteristics are connected to a plurality of interfaces and a bus line of the wearable computer main board, and the FPGA/CPLD has a restructural function on the board by the overprogram characteristics according to the customization of multiple function requirements. Original hardware change such as chip replacement, device replacement, and the like is converted into software change with rewritten content reset by an IP core. The wearable computer main board can be upgraded easily so as to shorten development period, improve applicability and reduce development cost.

The invention discloses an adaptive control method of a power factor. The adaptive control method comprises the following steps of: generating three voltage reference values by calculating, multiplying the three voltage reference values, taking a product of the three voltage reference values as a current reference value, comparing the current reference value with a direct current bus current, and outputting a calculation result after carrying out current error compensation processing; determining a duty ratio by virtue of the calculation result to form a pulse signal, controlling the make-break operation of a chopper to carry out chopping processing on a direct current voltage rectified and output by a rectifier bridge, generating a smooth direct current bus current and an alternating current input current in a same phase with an alternating current input voltage, improving the power factor, and reducing the current harmonic distortion ratio. A power factor correction method, provided by the invention, can be used for realizing the adaptive control on alternating current power supplies in different frequencies. The adaptive control method of the power factor is applied into variable frequency air conditioner products, and can be suitable for air conditioners based on inputs of 50-Hz and 60-Hz alternating current power supplies; and according to the adaptive control method of the power factor, a design purpose that a development is suitable for multiple types of machines is really achieved, the development period is shortened, and the research and development costs are lowered.

The invention relates to a method for correcting an elasticity modulus and stress-strain curve in a metal material compression test and a related model. The model is a sandwiched model. According to the method for correcting a metal material compression elasticity modulus and stress-strain curve obtained by the model, most of national standard or non-national standard samples of metal materials with linear strengthening behaviors, particularly metal samples in which L is equal to (2.5-3.5) d or L is equal to (2.5-3.5) b or L is equal to 2d or L is equal to 2b can be corrected, so that the real compression elasticity modulus can be measured on samples which are unsuitable for measuring the compression elasticity modulus in the national standard stipulation; particularly, the method can be used for correcting the elasticity modulus and stress-strain curve of small-size non-national standard samples. According to the method, the construction of a mechanical constitutive equation is greatly convenient, and for research and development of novel materials, the requirements of the test technology on the sizes and shapes of the samples can be lowered, the measured mechanical parameters are reliable, and the research and development period is shortened.

The invention discloses a fight simulation system. An experiment table of the fight simulation system comprises a navigation bridge hardware system, a fight task simulation system and a human-machine work efficiency assessment system. The human-machine work efficiency assessment experiment table integrates the work efficiency assessment of the information display interface with the traditional fight task simulation. By loading the design scheme of the information display interface of the aviation cockpit into the fight simulation system, the design scheme of the information display interface is assessed by using the human-machine work efficiency assessment system after a tester simulates the fight, thereby assessing the human suitability of the information display interface of the aviation cockpit. By using the human-machine work efficiency assessment experiment table, the design quality of the information display interface of the aviation cockpit can be improved, the development period can be shortened and the development cost can be reduced.

The invention relates to a matching method for a pure electric vehicle power system, which comprises the following steps: (1) determining parameters for each component of a finished vehicle; (2) establishing a simulative computation model for the finished vehicle; (3) inputting the parameters into the model for simulative computation; and (4) making performance simulative analyses for a plurality of times so as to improve and optimize the parameters. Through the method, parameters for the power system fully satisfying performance indexes can be obtained via repeated computation and optimization, so that the method is significant for the saving of the development period and cost.

The invention comprises a system and a method for comprehensively controlling a spraying industrial robot based on virtual reality technology. The system is characterized by comprising a virtual environment operating platform, a robot controller and a spraying robot, wherein the robot controller is connected with the spraying robot; the virtual environment controller is connected with the robot controller; the system of the invention provides a brand-new man-machine interaction environment, and the preview of an overall spraying process is finished through virtual simulation of the system; a user can observe the overall process of the spraying operation in real time and analyze a spraying effect through virtual operation on the system, so that technical indicators and parameters meeting the spraying effect are selected; and thus the system not only shortens the development period of a robot program but also improves the spraying accuracy, and is a platform with high economic benefit and easy acceptance to the user.

The invention discloses a precision lost wax casting technology based on selective laser powder sintering 3D printing. The precision lost wax casting technology comprises the following steps that S101, a target part is subjected to optimal design of a CAD casting technology; S102, selective laser powder sintering 3D printing forming is carried out; and S103, silica sol/water glass precision investment casting is carried out. A wax mold of the part can be fast manufactured without molds, the metal part is fast manufactured, fast manufacturing of complex parts can be achieved, and integration, automation and fastness in the precision casting technology process can be achieved; and the development period of new products are greatly shortened, development cost is reduced, and the precision lost wax casting technology is especially suitable for production of single small-batch complex castings and trial-manufacturing of new products.

The invention relates to an artificial feed of sesamia inferens walker as well as a preparation method and a feeding method thereof, belonging to the technical field of insect feeding. The artificial feed comprises soybean meal, corn meal, wheat germ, yeast powder, casein, cane sugar, honey, fresh wild rice shoots or fresh rice stems, ascorbic acid, cholesterol, choline chloride, Fiske salt, vitamin B complex, vitamin E, sorbic acid, methyl parahydroxybenzoats, 40 percent formaldehyde, 98.18 percent rice ketone, agal-agal and water. A long-term and successive feeding method of the sesamia inferens walker is carried out by adopting a wild rice shoots (young larva) and artificial feed (old larva until pupation). The fed larva of the sesamia inferens walker have development period of 24.8 days, larva survival rate of 76.6 percent, percentage of pupation of 87.7 percent, eclosion rate of 91.3 percent, egg laying amount of 101.9 for single adult and egg hatching rate of 88.8 percent. The invention has the advantages of low cost, practicability, simple preparation, and the like, and is suitable for massive, long-term and successive feeding of standard test sesamia inferens walkers.

The invention provides a method and a system for generating a systems-on-a-chip (SoC) verification platform, and aims to solve the problem that the conventional verification platform is low in reusability. The method comprises the following steps of: compiling the same part of different SoC verification platforms to form an automatic script, presetting different parts to form different templates, and putting into a template library; generating a corresponding configuration file for a SoC chip, wherein the configuration file comprises configuration information required by generating the SoC chip verification platform; extracting a template required by generating the SoC chip verification platform from the template library according to the content of the configuration file by using the automatic script; and generating the verification platform corresponding to the SoC chip according to the extracted template by using the automatic script. By the method and the system, different verification platforms can be automatically generated only by configuration without reconstruction, so that the development period of the verification platform is greatly shortened, an engineer can concentrate more time on development of test samples, and the correctness of the chip is ensured.

The invention discloses a method for detecting the diameter of an outer wall of a tapered case of an aviation engine on line. According to the method, a five-coordinate numerical control milling center with a Renishaw MP10 trigger-type measuring head is equipped, tapered case parts and a mounting seat on the surface of a tapered case are equipped; a fine adjustment ring gauge of the used measuring head is measured on line; a point contact-type measurement mode is adopted; a machine tool siemens control system Sinumeric 840 D on-line measurement technology is adopted; and an on-line measurement quick tool path amendment and error compensation generation technology is adopted. The method has a broad application prospect; and by the on-line measurement technology, a numerically-controlled machine tool is impelled to form a machining and detecting integrated numerical control machining unit. By the method, the traditional manufacturing mode that a design characteristic is equipped with a set of measurement tool in the current industry is changed, the manufacturing cost of the tool is saved, repair labor-hour is saved, and first-pass yield of product processing is improved, so that the development period and the production cost of new products are reduced.

The invention discloses a control method of an SCR (Selective Catalytic Reduction) system of an electrical control diesel engine. The control method comprises the following steps of: obtaining injection quantity of urea under the steady-state working condition by taking two-dimensional grids of rotation speed and torque and two-dimensional grids of exhaust temperature and air speed as base points and corresponding to NOX (Nitric Oxide) emission and NOX conversion efficiency of the original engine; and, based on an SCR steady-state control policy, correcting the injection quantity of the urea in the steady-state working condition by utilizing a correction model composed of an ammonia quantity storage function and adsorption and desorption functions of NH3, and obtaining the SCR control policy in the instantaneous-state working condition. Based on the model, the control method is nearly applied to all diesel engines; subsequent works of manufactures are only that corresponding calibration tests are carried out aiming at different types, therefore, the cost can be reduced, the research and development period can be shortened, and the research and development efficiency of the SCR system and a complete diesel engine factory can be greatly increased. The invention further discloses an SCR system of the electrical control diesel engine adopting the control method.

The invention belongs to the technical field of intelligent management of water-saving irrigation and relates to an intelligent drop irrigation cloud service management system based on a microservice-oriented architecture. The system adopts an architecture with a layer structure and comprises a user layer, an application layer, a gateway layer, a microservice layer, a data layer, an internet of things layer and a resource layer. In the system, a business is split into small-granularity microservice, so that the problems of high coupling degree, high maintenance cost and low reliability of a single architecture are solved; due to the combination of distributed deployment, the request processing capacity is improved, the flexibility is stronger, and the performance advantages is obvious; andthe functional combination is flexibly regulated, according to the engineering scale, crop variety and investment level as well as the practical condition, so that it is convenient to realize rapid upgrading, the problems of long development period, high investment and maintaining and upgrading difficulty are solved, and the universality and adaptability are improved. Microservice covers the links such as operation, maintenance, irrigation, fertilization, pesticide application, agricultural machinery and agricultural technologies of a drop irrigation system, the operation management level ofthe drop irrigation system is comprehensively promoted, the informatization advantage of a platform is exerted, and the water saving, beneficiating and quality improving levels are improved.

The invention relates to a system structure for realizing data conversion in service integration of an SOA (Service Oriented Architecture) application system, which comprises a runtime general frame module and a development period configuration format defining module, wherein the run time general frame module is used for supporting conversion extension of different data objects; and the development period configuration format defining module is connected with the runtime general frame module and used for defining configuration formats of the data object conversion. The invention also relates to a method for realizing the data conversion in the service integration of the SOA application system based on the system structure. By adopting the system structure for realizing the data conversionin the service integration of the SOA application system and the method thereof, the integration work of the system is simple and efficient, the calling process is more visual and convenient and rapid, the calling efficiency is improved, the run efficiency of the system is higher, the performance is stable and reliable, the cost of development and maintenance is lowered, the development period issimple, interfaces are clear, the configuration is convenient, the runtime efficiency is higher, the application range is wider, and the solid foundation is laid for the integration development of the SOA system.

The invention discloses an upgrading method of an embedded system in the application, which comprises the following steps: an external nonvolatile memory is firstly configured; the external nonvolatile memory is divided, a backup partition is respectively arranged in a core partition and a document system partition so as to prevent the abnormal running situation of the device caused by the abnormality during the upgrading process. When the system runs normally in the working environment, the upgrading process is remotely controlled by an upgrade server, finally the system is restarted, and the normal running state of the system is restored. The upgrading method greatly reduces the development difficulty and the development period, is free from making a precisely-simplified core, reduces the development complexity, improves the stability and makes remarkable progress.

The invention relates to an embedded system reliability analysis and evaluation method. The method is technically characterized by comprising the following steps of: based on an AADL architecture model file and an AADL error model file, forming an AADL reliability model file; converting an AADL reliability model into a general stochastic Petri net (GSPN) reliability model; and performing quantitative analysis on the AADL reliability model by using a conventional GSPN reliability evaluation method. The method brings convenience to automation of software architecture reliability analysis, and brings the convenience to a user to analyze and evaluate the reliability of embedded software at an early stage of software design and evaluate the reliability of software at an architecture level; and if the model architecture cannot meet a requirement, then the software architecture can be modified in advance. Therefore, not only development cost can be saved, but also a development period can be shortened.

The invention relates to a test method of the mobile terminal near filed radiation and the device thereof; wherein, the device includes a spectroanalyzer (51), a RF cable (32) and an electromagnetic wave receiving detector (52). The method includes the steps of: connecting the spectroanalyzer and the detector (52) via RF cable (32); configuring the spectroanalyzer (51), collecting the near field radiation continuous interference high frequency energy received by the detector (52); 1.4) adhering to and scanning the surface of the mobile terminal (14) by the electromagnetic wave receiving detector (52) till all the region is scanned over. In the method and the system thereof, the screening chamber replaces the microwave non-reflection dark chamber, and the trial test is carried out for product before the formal radiation continuous interference test so as to provide a favorable condition according to the conversion relationship of the near/distant field of the radiation electromagnetic field. The cost is saved, and the development period is shortened.