1777 results about "Systems simulation" patented technology

A process control system simulation technique performs real-time simulation of an actual process control network as that network is running within a process plant in a manner that is synchronized with the operation of the actual process control network. This real-time, synchronized simulation system includes a simulation process control network and a process model which are automatically updated periodically during the operation of the actual process control network to reflect changes made to the process control network, as well as to account for changes in the plant itself, i.e., changes which require an updated process model. The disclosed simulation system provides for more readily accessible and usable simulation activities, as the process control network and the process models used within the simulation system are synchronized with and up-to-date with respect to the current process operating conditions. Moreover, this simulation system is more accurate as it uses process models developed from the current state of the process whenever the simulation system beings to perform a simulation. Still further, the disclosed simulation system is easy to operate, as it uses the same user interface applications as the actual process control network and can be initialized and used at any time during operation the process plant without any significant configuration or set-up activities.

The power flow model of the multiterminal voltage-source converter-based high voltage DC (M-VSC-HVDC) transmission system for large-scale power systems is studied. The mathematical model is derived using the d-q axis decomposition of HVDC's control parameter. The developed model can be applied to all existing shunt voltage-source converter (VSC) based controllers, including Static Synchronous Compensator (STATCOM), point-to-point HVDC system, back-to-back HVDC system and multiterminal HVDC system. A unified procedure is developed for incorporating the proposed model into the conventional Newton-Raphson power flow solver. The IEEE 300-bus test system embedded with multiple HVDC transmission systems under different configurations are investigated. Simulation results reveal that the proposed model is effective and accuracy in meeting various control objectives.

The invention proposes a system simulation method for connecting large-scale wind power into a power grid in a centralization way and an effective equivalent mode of a high-capacity wind power station. Based on the synchronization operating characteristics of the large-scale wind power, the invention makes the large-scale wind power synchronization simulation analysis principle under the comprehensive consideration of the influences of the wind resource characteristics of wind power generation, the dynamic response characteristics of a wind driven generator and the differentiation characteristics of different types and different control modes of various wind driven generators and the like; therefore, the invention constructs the complete analytical framework and flows of the system simulation assessment with the large-scale wind power being connected into the power grid. The simulation analysis result shows that the system simulation method can comprehensively, objectively and accurately assess the impact and the safety bottleneck to the stable running of a power system caused by wind power synchronization after the base synchronization of the large-scale wind power due to the affection to the dynamic response characteristics of the power system by the differentiation of the types and the response characteristics of various wind driven generators and the wind resource characteristics. Therefore, the method is beneficial for the scheduling and operating staff to accurately grasp the affection to the system characteristics by the connection of the large-scale wind power and the law of the connection of the large-scale wind power, and has significant meaning for instructing and making the corresponding precautionary and improved measure and ensuring the normal running of the system after the connection of wind power.

The invention provides a simulation method and device of a digital twin system of an industrial robot. The simulation device comprises the industrial robot, a vision perception unit and a computer, wherein the vision perception unit is arranged at the tail end of the robot and is composed of a camera and a wire structure light emitter; an industrial robot simulation system is established, the robot is modeled, and three instructions are analyzed and run; a target three-dimensional measurement model of a robot visual system is acquired by using a wire structure optical geometric triangular method; a motion instruction is determined for the working task of the robot, virtual simulation is carried out through the computer, and reachable points and collision point detection are carried out; and the robot is actually used for identifying a target object through the visual perception unit, and the actual movement of the robot is driven. The simulation device is safe and reliable in virtual simulation, abnormal operation possibly in actual operation is avoided, the visual perception unit is used for identifying the target object through three-dimensional visual technology, the self-adaptive capacity of the robot to the field environment is improved, and flexibility and intelligence are enhanced.

A computing system and method are provided for algorithmic electronic system level design. An exemplary system comprises a plurality of databases for storing a plurality of functional models, a plurality of computational element models, and a plurality of hardware definition representations. An application design processor is adapted to perform a first functional simulation of an algorithm using a plurality of computational element architecture definitions to generate a first selection of a plurality of computational elements and corresponding control code for an implementation of the algorithm. A control and memory modeling processor is adapted to generate a plurality of flow transforms from the algorithm and to convert the plurality of flow transforms into the plurality of plurality of computational element models. A system simulation processor is adapted to convert the plurality of computational element models into the plurality of hardware definition representations and to perform a second functional simulation of the algorithm using the plurality of computational element models corresponding to the first selection and the corresponding control code.

A computer system simulation method starts with algorithmically implementing a specification model independently of hardware architecture. High level functional blocks representing hardware components are connected together using a bus architecture-independent generic channel. The bus architecture-independent generic channel is annotated with timing and protocol details to define an interface between the bus architecture-independent generic channel and functional blocks representing hardware components. The interface is refined to obtain a CCATB for communication space. The read( ) and write( ) interface calls are decomposed into several method calls which correspond to bus pins to obtain observable cycle accuracy for system debugging and validation and to obtain a cycle accurate model. The method calls are replaced by signals, and the functional blocks representing hardware components are further refined to obtain pin/cycle-accurate models which can be manually or automatically mapped to RTL, or be used to co-simulate with existing RTL components.

The present invention discloses a multi-redundancy flight control computer real-time simulator and a system thereof. The technical solution of the invention mainly comprises a development monitoring host and a real-time simulation target machine. The developing monitoring host is used for establishing a multi-redundancy flight control computer model in Matlab/Simulink model design software, providing modeling support, executing graphic monitoring to the simulation operation process of established model, executing on-line modification to the parameter related with the operation of target processor code according to monitoring result, and storing the data of real-time simulation process. The real-time simulation target machine provides hardware support to the simulation operation of model established by the host. The invention also discloses the development monitoring host and the real-time simulation target machine. The technical scheme adopting the invention can provide environment support for the simulation development and operation of redundancy system.

The invention relates to a system for simulating operation of a central air-conditioning. The system comprises a data collecting module for collecting building environment data required by simulating the operation of the air-conditioning; a simulation parameter selecting module, connected with the data collecting module, and used for selecting a parameter for simulation and a simulation mathematical model according to a simulated building object, and sending the data collected by the data collecting module and the selected parameter for simulation and the simulation mathematical model to the system simulation module; and a system simulation module, connected with the simulation parameter selecting module and used for carrying out simulation calculation by applying the selected simulation parameter and the simulation mathematical model according to the collected data. The system for simulating the operation of the central air conditioner can simulate the operation condition of the central air-conditioning system and provide reference data for the system to save energy.

The embodiment of the invention discloses a furniture simulation layout method and a furniture simulation layout system and belongs to the field of system simulation. The method comprises the following steps: capturing apartment layout drawings of buildings around the position of a terminal and modeling according to the apartment layout drawings to obtain indoor models of the apartment layouts; selecting a target furniture, calling scenes, corresponding to target positions, in the indoor models according to the target positions to which the target furniture is dragged, and displaying a model corresponding to the target furniture in the corresponding scenes in the indoor models; predicating supporting furniture matching with the target furniture according to the attribute of the target furniture, and issuing a model corresponding to the supporting furniture to recommend and display the model in corresponding scenes of the indoor models; and receiving a trigger signal and enabling the supporting furniture to be dragged and placed in the indoor models with the trigger signal. Intuitiveness is achieved by displaying effects with graphs, home furnishing spaces, furniture and the like are simulated and displayed through graphs, and a user can accurately judge whether a piece of furniture meets the selection requirement at a display terminal.

Method and apparatus for simulating a MMC system in an electronic simulator uses a computing unit and a connected input/output interface. The electronic simulator comprises a simulation model of a modular multilevel converter (MMC) system including at least one MMC valve, each MMC valve including a plurality of connected converter-submodules (SMs), each SM preferably comprising at least two controlled switches, a capacitor and auxiliary switches. The inventive approach replaces each MMC valve by an equivalent circuit whereby each SM in the valves may be solved separately. Multiple computing units are used to simulate those SMs in parallel, thus achieving fast or real-time simulation speed. The computing unit may comprise multiple computing means using CPU cores, FPGA or GPU cores and combinations thereof. The present inventive method keeps the model-detail including its precision, and enables a real time simulator to achieve fast or real-time speed for very large MMC system-simulations.

The invention provides an existing air conditioning system simulation method based on feature recognition. The method comprises the steps that according to actually-measured operating data of an existing air conditioning system, a least square method is adopted to obtain feature parameters of a water chilling unit performance prediction model, a surface air cooler performance prediction model, a cooling tower performance prediction model, a water pump model and a fluid conveying and distributing pipeline resistance model in the air conditioning system; according to the actual operating process of the air conditioning system, all the component models with the obtained model parameters are connected in a simulation mode; according to relevant input parameters of simulated conditions, the air conditioning system is subjected to simulation, and operating performance parameters of the air conditioning system are output. The air conditioning system simulation method combines theoretical analysis, actual testing and simulation, can well represent the performance change law of the air conditioning system under different operating conditions and can serve as a foundation for overall performance simulation and prediction of the air conditioning system.

A system and method for coordinating timing between simulation of a system and measurement and/or control of the system. A measurement/control loop comprising a measurement/control program, a simulation program, and an execution coordination kernel is described. The simulation program may be operable to simulate any of various types of systems. The measurement/control program may provide measurement/control logic for measuring various variables associated with the simulated system. The execution coordination kernel is responsible for coordinating the execution and time advancement of the measurement/control and simulation programs. The execution coordination kernel may be operable to intercept I/O calls produced by the measurement/control program and the simulation program. If the execution coordination kernel determines that the system is in simulation mode, the calls may be routed to software routines instead of to the I/O hardware.

An image of a sample print printed to obtain parameters is picked up by using “a parameter obtaining device” that meets the standards of an instrument for the invention of “the electronic scrap system.” Then, the picked-up image is captured by a DTP system, and color data of a needed position are imported to a parameter DB. Thereby, parameters for simulation to be used in an invisible code printing support system can be easily inputted. Use of this method eliminates the necessity of figuring out parameters through experiments and the like, and of inputting these parameters as numerical values. In addition, since this method uses a physical medium and inks to be actually used, as they are, their optical characteristics, an influence of a blue component of invisible light emitted from an ultraviolet LED, and the like can be inputted all together as a picked-up image. Accordingly, it becomes possible to input parameters capable of accurately reproducing actual printed conditions, and thereby to produce printed materials providing high reading accuracy.

The invention provides a train motion simulation system. Models are used by the simulation system and the models comprise a traction system model, a braking system model, a basic resistance system model, a line system model and a kinematic physical model. Thorough analysis is conducted on internal and external elements that influence a train motion state through the models, results simulated by the traction system simulation module, the braking system simulation module, the kinematic physical simulation module, the basic resistance system simulation module, the line system simulation module and the kinematic physical simulation module according to corresponding simulation models are closer to actual train states and requirements of engineering application. In addition, a train controller model and a corresponding train controller simulation module are added to the train motion simulation system, analogue simulation of controlling of a controller to a train is achieved so that analogue simulation of the train motion simulation system to train operating is closer to actual train states, more intelligent and closer to the requirements of engineering application.

One or more scenario parameters can be determined. One or more performance metrics can be determined. A vehicle configuration associated with an autonomously operating vehicle can be determined. The autonomously operating vehicle can be simulated in each of one or more scenarios for each of the one or more scenario parameters, each scenario including the determined one or more scenario parameters, wherein at least one of the one or more scenario parameters for each scenario is different from scenario parameters simulated in other scenarios. For each simulated scenario, the one or more performance metrics associated with the simulated scenario can be determined.

The invention discloses a locomotive semi-physical simulation device, system and method. The device comprises a real-time simulation unit, a computer and an electrical signal conversion unit. The computer converts a control instruction for simulating an upper-layer network control system into a bus communication protocol, and then sends the bus communication protocol to a communication conversion unit of the electrical signal conversion unit. The communication conversion unit sends the control instruction to an external physical controller, the physical controller outputs a control signal to a controlled object model according to the control instruction, the control signal is sent to a real-time simulation unit via the electrical signal conversion unit, the real-time simulation unit calculates a output result of a state signal of the controlled object model according to the control signal, the output result is sent to the physical controller via the electrical signal conversion unit, and the physical controller sends the state signal of the controlled object model back to the computer via the communication conversion unit. The technical problems that simulation integrity and precision of an existing system are not high, function verification cannot be accurately performed, the modification period is long, and efficiency and performability are low are solved.

The invention provides a simulation verification method for low voltage ride through (LVRT) of a wind farm. The method comprises the following steps of: analyzing operating characteristics of a wind generation set according to a verified wind generation set electric simulation model; establishing a wind farm electric simulation model, and verifying whether the wind farm has LVRT or not; and establishing a regional power system simulation model comprising the wind farm electric simulation model, and verifying influence of wind farm grid connection on secure and stable operation of a power system. The invention provides a complete and effective method for verifying the LVRT of the wind farm; and the method has positive significance on judging whether the wind farm meets the grid connection requirement or not, avoiding large-scale wind power off-line accidents and ensuring secure and stable operation of a power grid, and lays a foundation for establishing and perfecting a wind power grid-connected authentication system in China.

A lidar three-dimensional imaging system based on a virtual instrument comprises a three-dimensional scene modeling module, a lidar testing system simulation environment modeling module, a full-waveform signal processing module and a three-dimensional reconstruction module. The three-dimensional scene modeling module comprises a three-dimensional model loading element used for setting background colors, visual angle control, illumination, a projection mode, a display model and other basic scene projects. The lidar testing system simulation environment modeling module comprises four modeling sub-modules which are a laser pulse model, an atmospheric transmission model, an object interaction model and a receiving unit model. The laser pulse model is used for simulating a laser source according to the wavelength, pulse width, energy and other characteristics of a laser. The atmospheric transmission model is used for simulating a tested atmospheric environment, so that a noise model is generated for acting on the laser. The object interaction model is used for simulating effects of the laser and a detected object, and the effects comprise mirror reflection, diffuse reflection, surface reflection and speckles. The receiving unit model is used for simulating detector noise and amplifier noise which are generated after sensing.