52 results about "Digital simulator" patented technology

An x-ray diagnostic apparatus and methods performs Real-Time Digital Radiography with particular application in dental x-ray imaging modalities, such as Orthopantomography, Scannography, Linear Tomography and Cephalography, by using a versatile and modular electronic unit, featuring ultra fast computation capability to serve diversified image sensor typology and scanning modality.

In Digital Orthopantomography and Scannography, a plurality of tomographic images at different depths of the jaw can be generated, based on the pre-selection made by the user interface.

The image processing unit utilizes for the tomo-synthesis of the diagnostic image an accurate and economic digital simulator of the radiographic film speed, including a digital frequency synthesizer fed with film cassette speed digital input and high resolution clock signal, ensuring accurate and reproducible phase continuity of the output frequency signal.

It also introduces an automatic adaptation of the frame acquisition rate in frame transfer mode, based on the actual speed of the cassette unit. By this method the dynamic of the exposure signal is reduced, and a better optimization of the signal response of the x-ray detector is achieved.

The fault ride-through and power smoothing system includes a buck converter for Maximum Power Point Tracking (MPPT) of a PV array power system, a buck-boost converter to connect a supercapacitor energy storage system (SCESS) to the DC link, and a voltage source converter (VSC) to transfer the DC link power to the grid. Three independent controllers are implemented, one for each power electronics block. The effectiveness of the controllers is examined on Real Time Digital Simulator (RTDS).

The invention relates to the field of electrical power systems, in particular to a power level digital-analog hybrid simulation system. The power level digital-analog hybrid simulation system comprises a hardware circuit and a digital model, wherein the hardware circuit is used for achieving the power conversion between the digital side and the physical side and feedback signal acquisition input at the physical side, the digital model is used for achieving historical current calculation, delay compensation, current output at the digital side and voltage acquisition input at the physical side and decoupling a line model. The power conversion is carried out between the hardware circuit and the digital model, a digital simulator is connected with a device to be simulated in the physical side through the hardware circuit, calculation is completed by the digital model, calculating parameters are output to the hardware circuit, meanwhile, the hardware circuit feeds back electrical parameters to the digital model to serve as input, and the power level digital-analog hybrid simulation between the digital side and the physical side is achieved. The power level digital-analog hybrid simulation system adopts hardware and software sources, achieves power level hybrid simulation of the digital simulator and a physical simulation device, and solves the problems that access to actual power primary equipment such as a generator, a transformer, a line and a converter cannot be achieved and the simulation scale is small.

A hybrid simulation method uses a simulator tool feeding kinematics commands to a movement simulator on which a moving body is mounted and to a target representative of an objective to be reached by the moving body, and on detection of an event representative of overshooting or changing a first designated objective for this moving body, the method includes a positioning stage associated with a second designated objective for the moving body, including comparing positions executed by the movement simulator in response to transition kinematics commands with a first predetermined setpoint position and activating a first marker if a position substantially the same as the first setpoint position is detected; comparing positions executed by the target in response to transition kinematics commands with a second predetermined setpoint position and activating a second marker if a position substantially the same as the second setpoint position is detected; when the first and second markers are activated, a step of evaluating a difference between the current kinematics command supplied to the movement simulator and the target by the digital simulator tool; and, if this difference is below a particular threshold, a piloting stage including applying corrective terms linked to the setpoint positions to the kinematics commands coming from the simulator tool before they are fed to the movement simulator and to the target.

A simulator includes a memory for storing a first netlist, a timing library, and a standard parasitic exchange format (SPEF) file; and a processor configured to compensate for delay to synchronize digital and analog signals. The processor includes a delay calculator module for generating one of a rising time and a falling time and a standard delay format (SDF) file using the first netlist, the timing library, and the SPEF file; an SDF file converter module for adjusting an interconnect delay description included in the SDF file to compensate for delay using the one of the rising time and the falling time; and a digital simulator module for generating an event using a first driving cell according to a compensated interconnect delay description.

The invention relates to a solar energy-based control system of a police electric patrol vehicle. The solar energy-based control system comprises a solar cell panel, a voltage regulation system, a microprocessor, a digital simulator and a control circuit system, wherein the solar cell panel is used for converting solar energy to electric energy and is connected through a wire, the voltage regulation system is used for regulating a voltage to an adaptive voltage and providing the electric energy for the microprocessor to work, the microprocessor is used for processing data, making an instruction and providing the electric energy for a load by externally connecting the digital simulator, and the control circuit system is used for achieving the charging process of a storage battery pack by a control switch. The solar cell panel is used for converting the solar energy to the electric energy, the electric energy is stored in a storage battery for use, and the environmental-friendly requirements of cleanness, greenness, energy saving and zero emission are really achieved.

The invention discloses an experimental facility for simulating a wind turbine. The experimental facility comprises a digital simulator, a computer, a PCI (Peripheral Component Interconnect) data acquisition card, a motor driver, an electric motor, a coupler 1, a rotating speed and torque sensor, a coupler 2, an electric generator, a current sensor and a voltage sensor; a wind turbine mathematical model in the digital simulator is adopted to calculate the torque of the wind turbine according to the input wind speed curve, the pitch angle, the rotating speed fed back by the electric generator, the torque of the wind turbine and the torque fed back by the electric generator are calculated by a PID (Proportion Integration Differentiation) controller in the digital simulator to obtain a motor torque command; the digital simulator carries out sampling on the rotating speed and torque sensor by the PCI data acquisition card in each sampling period to obtain the feedback rotating speed and the feedback torque of the electric generator, and besides, the motor torque command is input to the motor driver to regulate the output torque of the motor to drive the electric generator to rotate. The experimental facility can simulate the running characteristic of the wind turbine in a practical working condition in a laboratory without wind field environment or the wind turbine.

A method includes operating a digital simulator to mimic loading effects of digital circuit blocks of a circuit design on analog circuit blocks of the circuit design. The digital simulator sets a current signal timing and a current level value at an analog/digital boundary between the digital circuit aspects and the analog circuit aspects. The analog simulator is operated to apply the current signal timing and the current level value to simulate the analog circuit blocks.

The invention provides a closed-loop simulation system for optical measurement of direct-current power transmission engineering. The closed-loop simulation system comprises a real-time digital simulator, an optical measurement simulation interface, a merging unit and a control protection device; the real-time digital simulator simulates multiple paths of electrical quantity signals of optical measurement of the direct-current power transmission project, and outputs the multiple paths of electrical quantity signals to the optical measurement simulation interface through a simulation communication protocol; the optical measurement simulation interface converts the simulation communication protocol into a communication protocol actually used by an optical measurement direct-current power transmission project; the merging unit merges and synchronizes the multiple paths of electric quantity signals and outputs the processed electric quantity signals to the control protection device; and thecontrol protection device receives the electric quantity signal sent by the merging unit. Accurate simulation of a high-speed sampling link of direct-current power transmission engineering optical measurement is realized, high-sampling-frequency electrical quantity can be output to an engineering optical transformer merging unit, direct-current engineering rapid protection test requirements are met, and the realization method is simple and convenient to operate.

The invention discloses a space manipulator teleoperation simulation training system and method. The system comprises simulation training interaction equipment, a simulation training server, a space manipulator digital simulator and a training guidance evaluation subsystem. The simulation training interaction equipment is used for receiving space manipulator control information input by an operator; the simulation training server is used for generating a space manipulator control instruction and predicted operation data according to the space manipulator control information; the space manipulator digital simulator is used for generating actual operation data according to the space manipulator control instruction and sending the actual operation data to the simulation training server; and the training guidance evaluation subsystem is used for planning a training process and training project management to obtain a planning result, and determining a training effect according to the planning result and the actual operation data. The technical problem that in the prior art, the requirement of operators for space manipulator teleoperation control training cannot be met is solved.