35results about How to "Meet Simulation Needs" patented technology

The invention relates to the field of logic verification development and discloses a system for simulating an Ieee1588 module in an OTN (Optical Transport Network). The invention also discloses a method for simulating the Ieee1588 module in the OTN (Optical Transport Network). The method comprises the steps that S1, an excitation generation module generates Ethernet frames and ptp frames; S2, the ptp frames are mixed with the Ethernet frames, thereby forming mixed Ethernet frames; S3, a simulation system access module captures the mixed Ethernet frames and generates a drive signal for driving DUT, and the simulation system access module captures the Ethernet frames and the ptp frames generated by the excitation generation module and sends the Ethernet frames and the ptp frames to scoring boards; S4, a simulation system output module monitors and obtains the mixed Ethernet frames output by the DUT; S5, the mixed Ethernet frames output by the DUT are separated, thereby obtaining the Ethernet frames and the ptp frames; and S6, in the scoring boards, the separated Ethernet frames are compared with the Ethernet frames generated by the excitation generation module, and the separated ptp frames are compared with the ptp frames generated by the excitation generation module. The system and the method are high in multiplexing.

The invention discloses small satellite attitude control ground simulating device and method. The small satellite attitude control ground simulating device mainly comprises a simulation support module and a satellite tested module, wherein the simulation support module comprises a simulation computer, an embedded processor and a field programmable gate array; the satellite tested module comprisesan attitude control processor, measuring parts and executing parts; the simulation computer, the embedded processor and the field programmable gate array are sequentially connected; and the attitude control processor, all measuring parts and all executing parts are respectively connected with the field programmable gate array. The invention is suitable for the simulation requirements of satellites in various models, simultaneously meets various ways of semi-physical simulation requirement, has simpler development and maintenance of simulation computer software, more flexible and convenient operation of the simulation process and the analysis of a simulation result, simple realization and low cost and greatly shortens the development time and development cost of the satellite attitude control ground simulating device.

The invention relates to a modeling and analysis method in the field of electrical power system modeling and simulating, in particular to a power distribution system multi-dimensional multi-resolution modeling and analysis method. According to the power distribution system multi-dimensional multi-resolution modeling and analysis method, one or more standard values are selected, the multi-dimensional resolution of a model is composed of parameters such as the percentage of the internal power capacity to the standard value (the internal power capacity percentage for short) and the percentage of a load to the standard value (the load capacity percentage for short), then conventional models of the current, the voltage, the line losses and the like are shown in the multi-dimensional resolution mode, a plurality of resolution modes are formed along with changes of the resolution, accordingly, a multi-dimensional multi-resolution model is built, and finally electrical characteristics such as the current, the voltage and the line losses in the system are analyzed based on the model. According to the power distribution system multi-dimensional multi-resolution modeling and analysis method, the multiple models with different resolutions are mutually connected in a joint environment, dynamic characteristics in a power distribution system are jointly reflected from multiple angles and multiple layers, and accordingly the simulating efficiency and the simulating quality are improved.

The invention discloses a hierarchical dynamic equivalence method suitable for a regional power grid. The method comprises the steps of dividing a large-scale power grid into an internal system and an external system; building a power grid model of the internal system according to a topological structure of the internal system; dividing the external system into three layers of an outer-layer external network, an inner-layer external network and a buffer network; building an equivalent model of the outer-layer external network by adopting a coherent equivalence method; building an equivalent model of the inner-layer external network by adopting a dynamic equivalence method based on physical equivalence; building a power grid model of the buffer network according to a topological structure of the buffer network; simplifying 500kV backbone networks in the equivalent model of the outer-layer external network and the equivalent model of the inner-layer external network to the boundary of the buffer network by adopting a backbone network simplification method, and forming an equivalent model of the external system by the equivalent model of the outer-layer external network, the equivalent model of the inner-layer external network and the power grid model of the buffer network; and combining the power grid model of the internal system with the equivalent model of the external system to finally obtain an equivalent model of the regional power grid. According to the method, the simulation efficiency and the equivalence precision are ensured.

The invention discloses a polyester fabric hydrophilic antistatic agent which consists of the following components by weight percentage: 8 to 18 percent of DMT, 38 to 48 percent of glycol, 16 to 26 percent of polyoxyethylene, 6 to 16 percent of zinc acetate, 4 to 14 percent of diantimony trioxide and 3 to 8 percent of triphenyl phosphate, and the total amount of all the components is 100 percent.Interchange esterification and condensation polymerization are carried out to all the components so as to obtain the hydrophilic antistatic agent. The hydrophilic antistatic agent is adopted to prepare fabric-washing treatment liquid, and during the process the magnesium chloride hexahydrate is added and a two-dipping-two-rolling method is adopted to deal with the polyester fabric, and then the fabric is dried so as to complete the later finishing to the terylene fabric. The hydrophilic antistatic agent of the invention has stable antistatic capability, good washing resistance and low price. Adopting the antistatic agent to the later finishing of dacron can save the baking process of applied process so as to reduce energy cost and enhance the wearing property of polyester fiber and corresponding fabrics so as to meet the simulation requirement to polyester fabrics of costume fabric market.

The present invention proposes a design method for hardware-in-the-loop simulation elements for large-scale unmanned swarm networks. The present invention is based on the framework of SDN, and is oriented to the existing hardware-in-the-loop simulation platform. The simulation elements of virtual nodes, wireless channels and controllers are targeted The innovative design realizes virtual nodes simulating various physical nodes, and realizes the technical effect of node transmission, computing, and storage integration; solves the problem of high dynamic topology change simulation of semi-physical simulation platform; solves the problem of accurate wireless channel of mobile ad hoc network Simulation of link characteristics such as delay, jitter, and packet loss rate makes the large-scale unmanned cluster network simulation real and reliable.

The invention discloses a model data management method for a comprehensive monitoring and simulation training system oriented to equipment functions in subway comprehensive monitoring, comprising: establishing a template-equipment model data management framework based on equipment-oriented function simulation; The logical association of the point templates contained in the template realizes the function simulation definition of the equipment template; the data configuration of the equipment simulation model is carried out, and the data modeling and function simulation in the subway comprehensive monitoring simulation training system are carried out. Based on the equipment-oriented function simulation, the present invention establishes a template-based equipment model data management framework, and combines the equipment function simulation logic template to solve the problem of traditional data modeling and function simulation design methods in the comprehensive monitoring and simulation training system. Problems such as poor integrity and large data volume caused by point-oriented function modeling management.

The invention relates to a cross-platform spin stabilization satellite flight simulation system which mainly comprises a flight simulation control system and a dynamic simulation system. The flight simulation control system comprises an operation control module, a data transmitting module, a data receiving module, a remote control processing module, a monitoring display module and a real-time recording module. The dynamic simulation system mainly comprises a data input module, a four-stage engine ignition simulation module, a fuel amount / storage tank pressure and engine thrust computing module, an accelerometer nutation measured value computing module, an independent nutation control computing module, a nutation control / gesture control selecting module, a control force and torque computing module, a gesture kinematic and dynamic computing module, a control total impulse accumulation computing module and a track amount measurement computing module. The cross-platform spin stabilization satellite flight simulation system has relatively high versatility and can perform data exchange and simulated training with a spin stabilization satellite mold platform, a manned space flight satellite mold platform and an exploration satellite mold platform, thereby finishing simulation for states of satellite independent nutation control, rotating speed control, time delay measurement, gesture control, emergency nutation control, emergency spinning, etc.

The invention discloses a generalized simulation modeling method of a desulfurizing tower with dynamic characteristics. By researching and analyzing technological designs and reaction processes of desulfurizing towers in different flue gas desulfurization systems, a generalized mathematical model is set up for the desulfurizing tower with dynamic characteristics by utilizing a wet ammonia process and a limestone-plaster wet process.In a model for the desulfurizing tower, simulation of two desulphurization methods can be easily switched and independently operated in order to satisfy the simulation need of different desulphurization processes. Compared with a signal method, the desulphurization model is more practical.Compared with the prior art, the generalized simulation modeling method of desulfurizing tower with dynamic characteristics has following beneficial effects: based on the modularization modeling method of a control body, the overall dynamic process of the desulfurizing tower can be simulated. Dynamic parameters such as in-vivo temperature, pressure, pH value, SO2 concentration and desulfurization rate can be calculated.The generalized simulation modeling method of the desulfurizing tower with dynamic characteristics has following beneficial effects: by using the desulfurization tower in a thermal power plant as a simulation object, dynamic simulation tests are conducted to the model; dynamic characteristics of the object can be simulated by a simulation operation result; accuracy and generality of the model can be proved; and the model can be used for simulation and development of a wet flue gas desulfurization system.

The invention discloses a method of eliminating negative resistance of a power system. The method is characterized in that step S10, a power flow result of a simplified power network system and a resistance value and a reactance value of a newly generated serial connection branch circuit comprising the negative resistance are acquired, and the power flow result is a power flow calculation result before the simplification of the power network system; step S20, the equivalent current network conversion of the serial connection branch circuit comprising the negative resistance is carried out, and a ground admittance branch circuit comprising the negative resistance and positive resistance is acquired by the conversion; step S30, the negative resistance of the ground admittance branch circuit is neglected, and the positive resistance is retained, and then the parameters of the branch circuit comprising the negative resistance are updated to form a new branch circuit. The method of eliminating the negative resistance based on the power flow calculation result is advantageous in that the negative resistance is eliminated by adopting less steps and without changing the dynamic characteristics of the system a lot, and therefore a modeling requirement of an electromagnetic transient state simulation software on the network comprising the negative resistance and the simulation requirement of the network comprising the negative resistance are required.