39 results about "System design process" patented technology

The invention discloses an image navigation/registration demonstration and verification system based on a real-time simulation platform and a control method. The system comprises a data management computer, an image navigation and registration coprocessor, a payload simulator based on the real-time simulation platform, a dynamics and attitude and orbit control computer simulator based on the real-time simulation platform, a payload work instruction generation tool, a performance demonstration, verification and evaluation system and a ground telemetering and telecontrolling system, wherein the payload simulator is used for simulating the in-orbit work state of a satellite payload, and the dynamics and attitude and orbit control computer simulator is used for simulating the in-orbit work state of a satellite attitude and orbit control subsystem. The system and the method can be used for carrying out evaluation, demonstration and verification on a design result during the designing of an image navigation and registration subsystem and can also be applied to failure determination and inversion during the in-orbit operation of a satellite. The system and the method have the advantages that the practical engineering problem that ground verification is carried out when dynamically-compensated image navigation and registration is carried out on the satellite is solved, and the validity of an image navigation and registration design is guaranteed.

The invention relates to a dynamics simulation analysis method of a uniformly distributed load bearing system. The method comprises the following steps of: (1) performing finite element modeling on the system in Patran software environment; (2) applying uniformly distributed load to a built system model, adding constraints, and generating a node balance load file of a finite element model; (3) processing a neutral format file and the load file through a DOS (Disk Operating System) to generate the neutral format file, wherein the neutral format file can be input by Adams software and includes load information; (4) inputting the neutral format file including the load information into the Adams software to generate an Adams dynamics simulation model of the analyzed system; (5) performing pre-processing setting on the simulation model, and performing simulation calculation; and (6) performing post-processing on the calculation result of the Adams software, and completing the subsequent system intensity analysis work. The method has the advantages that the analysis model consistent with the real loaded and constraint condition of the system is built; the calculation precision and the reliability in the system design process are effectively improved; the development period is shortened; and the development cost is reduced.

The invention discloses a hardware synchronous circuit structure suitable for a multiprocessor system, which can be connected with a plurality of processors in a certain interconnection mode, and provides a configuration and access interface. A target system at least comprises a plurality of processors, a hardware synchronous circuit structure and a mutex semaphore unit. Meantime, the invention discloses a method for realizing the hardware synchronous circuit structure for the multiprocessor system. The invention can efficiently realize multiprocessor communication and parallel task scheduling, and simplifies the parallel programming operation of the multiprocessor. The circuit structure is more simple and easier to use compared with other synchronous structures and methods, has low complexity, and can be conveniently integrated to a system design process.

The invention discloses a multiprocessor system with a hardware semaphore module. The system at least comprises a plurality of processors, a hardware semaphore module and a plurality of shared resources; the processors are mutually connected with the hardware semaphore module in a certain interconnection manner and are connected to the shared resources so as to realize the access to the shared resources. The invention also discloses a realization method of the hardware semaphore of the multiprocessor, and the method comprises the following steps: after a processor fails to apply for the hardware semaphore, various subsequent processing methods are provided; and after the subsequent processing to the processor is authorized, the processor can be rapidly waken-up to jump out of a low power consumption mode. The invention can effectively realize the mutual exclusion and the dispatching constraint of the multiprocessor, simplify the programming work of the multiprocessor is combined with the power consumption control of the processor core simultaneously and can realize the design of low power consumption of the system. Compared with other methods, the method is simple and easy for use, is low in complexity and can be conveniently integrated to the designing process of the system.

The invention discloses an IEC61850 design method based on electric power monitoring. It is based on the messages sent by various MMS message servers, correctly encodes and decodes the MMS protocol, and then encodes and decodes the MMS messages. The whole system The design process includes the following steps: a. Process of parsing messages; b. MMS software design; c. Message response process; d. The entire IEC61850 dynamic library data stream communication scheme, which is an asynchronous communication method, analyzes and processes messages and Sending the message and responding at the same time, after receiving the server message, respond to the message, analyze all kinds of messages when parsing the message, get the analysis result, and finally store the obtained structure. The present invention extracts data while checking, and its storage method adopts a storage method in which dynamic storage space, agreed data type, server data and redundant data backup are stored at the same time, an efficient and safe message error processing scheme, and further improves the safety and security of the system reliability.

The invention provides a deep-refrigerating liquid air energy storage system with air stage intercooling. During a conventional liquidation process, air is subjected to stage intercooling through each stage of compressor, so that the energy consumption of the compressors is greatly reduced. However, when the heat storage temperature is lower, the output power of the unit mass of an expansion unit 7 is less, and when the heat storage temperature is higher, the strength of an air compressor group 1 is limited, so that during a liquidation air energy storage system design process, both the air compressor group 1 and the expansion unit 7 need to be considered comprehensively, and thus the optimization design is made. According to the embodiment of the invention, one stage of compressor is set to be a cooling compressor only for cooling but not for compressing, so that the temperature and pressure conditions of liquid air can be reliably controlled, and the storage internal energy is helped to be improved.

The invention relates to a method for determining coal slurry pipeline transportation concentration in a coal slurry fluidized bed boiler feeding system. According to the feeding characteristics of the coal slurry fluidized bed boiler, the method respectively establishes a model of coal slurry pipeline wet-process transportation pressure-loss and power-consumption, a model of boiler load and coalslurry heat energy-balance equation model, a relational model of boiler efficiency and coal slurry water content and the like, and provides an optimal objective in which the coal slurry transportation power consumption and the minimal cost loss of coal slurry raw materials are comprehensively considered. Thus, the invention establishes a total optimal proposition. The optimal coal slurry transportation concentration is obtained by using the optimal solution through nonlinear sequence quadratic programming algorithm. The invention can be used for operation optimization of the coal slurry fluidized bed feeding system, and can be also used for design optimization and equipment selection in the design process of the coal slurry fluidized bed feeding system, thereby having important practical meaning and application value.

The present invention discloses a method for design of photoelectric micro power system based on model analysis and pertains to the technical field of photoelectricity. According to the node composition and functional requirements of the integrated photoelectric micro power sensor, the present invention divides the sensor into four parts: energy conversion subsystem, energy storage subsystem, energy management subsystem and sensor nodes. The energy parameters of these four parts are analyzed. According to the power supply method to sensor nodes from the photoelectric micro power system, a design model for the relations between different energy parameters of the photoelectric micro power system is established. According to the functional requirements of the photoelectric micro power and the environmental features of the areas where micro power is used, system design parameters are determined. From system design parameters and micro power design model, the area of photovoltaic cell and the cell circuit of micro power system are determined, thus completing the design of integrated sensor photoelectric micro power system. The present invention uses a design model to greatly simplify system design process and establish a universal design method for the design of photoelectric micro power system.

The invention relates to an echo noise suppressor, which comprises a secondary filter module and a main filter module, and is characterized in that the secondary filter module calculates input signals of a system after generating self excitation and estimates noise to carry out initial spectrum estimation, and provides signals for the system to acquire basic signal-to-noise ratio SNR by two parallel NLMS filters; after output signals of the two parallel NLMS filters are subjected to power averaging calculation of 4TAP, calculated numerical values are sent to an SNR calculation module which is connected with a gain margin calculation module, and the system can obtain gain acquired by a self-excitation cancellation system during system design according to output of the gain margin calculation module; and moreover, the signals processed by the SNR calculation module are input to the main filter through a step length control module. Based on design of filter algorithm of FPGA, the echo noise suppressor effectively monitors a critical self-excitation state of a repeater and automatically cancels echo noise, reduces limit of isolation to the repeater, and effectively promotes development of the repeater.

The invention discloses a multi-domain system design and optimization method. The multi-domain system design and optimization method comprises the steps of presenting a system optimizing method in a formalized mode on basis of system modeling language SysML(System Modeling Language), and defining the presentation standard of a system design model by a SysML extension mechanism; analyzing according to the functional demands of a multi-domain system to be designed and optimized, establishing a system design model on basis of the presentation standard, and automatically extracting a system optimizing model; and invoking a system optimizing method to automatically solve the system optimizing model, returning an optimizing result to a system optimization model, and optimizing the system design model according to the optimizing result. According to the method disclosed by the invention, the system design and the system optimization can be combined effectively, and the automatic optimization of the system can be realized in the system design process.

The invention provides a method for preanalysis according to the relationship between metadata and data objects. The preanalysis method comprises the following steps: the request message for querying specific objects is received; the specific objects are retrieved and the query results are sent. The query results include the information of the data objects relating to the specific objects. The query results comprise the information of the data objects influenced by the specific objects, which in particular comprise the information of the data objects influenced by the specific objects and/or the information of the data objects that the specific objects belong to, and /or the object information quoting the specific objects, and/or the source object information of the specific objects, and/or the information of the data objects influenced by the data objects which are influenced by the specific objects, and/or the information of the specific objects. The invention further provides a analytic system for preanalysis according to the relationship between the metadata and data objects; the analytic system comprises a receiver, an indexing unit and a transmitting device. The invention can improve the automatic analysis capability in system design process.

The invention relates to the field of power electronics alternating current and direct current conversion and aims to provide a three-phase voltage type converter control method based on switching system multi-step predictive control. The method comprises the steps of determining three-phase reference output current, establishing a converter switching system model and a switching subsystem, predicating first switching period each subsystem output current, carrying out optimization of the first switching period subsystem, predicating second switching period each subsystem output current, determining a converter real switching state, and correcting a system error. According to the method, through introducing a switching system analysis method and the relate theory of multi-step predictive control, the performance of a converter is improved, the accuracy of output power is raised, the harmonic disturbance and the reactive power are reduced, a system design process is simplified, and the use of auxiliary equipment is reduced.

The invention discloses a monitoring trail generation joint optimization method in consideration of wavelength allocation in an all-optical network. In the design process of a link failure monitoring system based on monitoring trails, the number of monitors is considered, the consumption of a wavelength resource is brought into the calculation of the total cost, and the number of monitoring trails borne by a single link is added to the constraint condition of monitoring trail generation, so that for the monitoring trails, the links bearing a few monitoring trails are preferably selected; meanwhile, the algorithm is further combined with a layered graph model, and an alternative monitoring set is increased, so that the learnt search space is enlarged, the number of monitoring trails borne by the single link is obviously lowered, and the total cost of the monitoring system is further reduced after the resource optimization algorithm. Under the condition that the cost ratio of the wavelength resource is high, the optimization effect is more obvious, and the total cost of the link failure monitoring system can be furthest reduced.

The invention discloses a fault diagnosis method and apparatus. The method comprises the steps of receiving fault reports, and deleting secondary fault reports by utilizing a mutual triggering relationship among the fault reports; analyzing the rest of fault reports to delete fault modes meeting a specified condition; and according to the rest of fault modes, reporting fault sources based on predetermined levels. According to the scheme, for a characteristic that test passing information is unavailable due to a reason of system design, working modes, fault blockage or the like in a specific function system, a conventional fault diagnosis method is improved, so that quick and efficient requirements of an actual diagnosis system design process are met.

The invention relates to a design method of a screw pump production system based on an optimal solution, the method comprising the following steps: a, constructing a screw pump production system parameter database; b, carrying out construction of a neural network training set: according to the classification standard, the parameter database is divided into training sets containing three kinds of working conditions; c, performing the training process of the neural network, so that the neural network learns the parameter characteristics of the reasonable working condition, and determining the optimal solution; d, performing practical application: the optimal solution obtained from the trained neural network is applied to the design process of a screw pump production system. The method adoptsthe trained neural network to guide the design of the screw pump production system, avoids the lengthy formula calculation process, shortens the design cycle and saves manpower and material resources. The selection standard of the optimal solution is determined by the effective power, output, pump life and other factors, which makes the design results given by the neural network more in line withthe needs of production and development of oil wells, and the design results are more accurate.

The invention provides a system fault rate allocation method and device based on an autonomous operation control mode, and the method comprises the steps: determining a top event, building a fault tree model according to the top event, optimizing the fault tree model, carrying out the system hazard THR allocation according to the system fault tree model, and carrying out the system function TFFR allocation based on the system hazard THR allocation and a function fault tree model. And determining each security function SIL level and a basic event based on the TFFR distribution result, guiding a security-related system design process according to the security function SIL levels, and performing evaluation verification on the TFFR distribution result according to the basic event. The method solves the problems of incomplete hazard analysis, common cause failure of the system, strong human subjectivity and the like in the prior art, defines a specific operation process and an available method, establishes a system fault tree and a function fault tree, completes THR value distribution of system hazard according to the system fault tree, and improves the system hazard assessment efficiency. And completing the TFFR value of the function module and the fault rate distribution of the independent physical component according to the function fault tree, and verifying the validity of the distribution result.