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Based on the rigid dynamics as well as applied nonlinear theory, an adaptive nonlinear controller of a single hydraulic cylinder's test stand is developed and realized, which compensate in real time for nonlinear force produced by joints when mechanism rapidly moving in high speed. First, model of kinematics and dynamics of the test stand are built, meanwhile nonlinear Controller is designed by using...
This paper presents the simulation and comparison of models of first and second order of an electrical machine, in Soft Real Time. First, it describes the real-time systems and their classification. After is considered the electromechanical circuit of a Series wound DC motor, for obtaining the first and second order equations which represent the system (In continuous time and discrete time). The models...
Fracturing rigid body has been one of the hotspots and the difficulties in the field of computer graphics in recent years. The common used finite element analysis always needs complex physical calculations, thus it cannot meet the real-time requirement of game and simulation. In this paper, a novel Voronoi diagram based fracturing rigid body simulation approach is proposed, which gets a result with...
Audio recording/reproduction techniques have been investigated to further the realization of highly realistic communication. However, to achieve ultra-realistic communication, a real-time acoustic rendering technique must be developed along with current recording and reproduction techniques. Acoustic simulation is a promising way to simulate, predict, and render acoustic phenomena. However, it is...
A hardware-in-the-loop (HIL) platform for power electronics is presented, which is based on a real-time circuit simulation algorithm and a high-throughput, low-latency processor architecture implemented in a field-programmable gate array (FPGA). By using a simulation sampling time of 1 µs, including input/output latency, the platform enables the high-fidelity, real-time simulation of power electronics...
Commercially available real-time simulation systems, usually based on a real-time version of Linux, can support real-time simulations with frame times as low as 10 to 20 microseconds. There is, however, a growing class of problems for which shorter frame times are essential. This is true for example of hardware-in-the-loop simulations of many power electronic and automobile engine simulations. The...
The simulation of the irregular objects is a difficult and attractive problem in computer graphics. Flame simulation is of a great challenge because of the variability of the shape of fire. A new method of flame simulation based on the improved particle system and texture rendering is proposed in this paper. This model is introduced to study structured particle and the performance of the random process...
Application of state variables in description of linear and non-linear dynamic systems brings many advantages therefore that description is frequently used in modeling and simulation. For digital simulation using PC such system needs fundamental matrix for chosen sampling interval to be calculated. Such calculation, which uses finite number of input elements from infinite sequence, is therefore biased...
Based on the RTPS protocol and the NDDS network messaging middleware, a distributed real-time simulation network of satellite system is developed with Constellation software. Considering the structure feature of actual satellite, the module decomposition technique of distributed simulation is discussed in this paper. And with the RTPS protocol and NDDS network middleware, a synchronous control of...
In this paper, we report a combined electrical and thermal simulation carried out using two real-time digital simulators located approximately 3500 km from each other. The electrical model was developed on the RTDS simulator at the Center for Advanced Power Systems, Florida State University, Tallahassee, Florida, while the thermal model was developed on an OPAL-RT simulator located in the RTX-Lab...
Aiming at the problem that hardware-in-the-loop (HITL) simulation still relies on the medium in process industry, this paper designs a new kind of HITL simulation system in which there is no medium and controllers are simulation software, introduces the constitution of the simulation system, studies the key technology both for simulation software and communication design in the no-medium HITL Simulation...
Along with the rapidly advancement of the computer hardware and software technology, special-purpose simulation computer system has gradually failed to keep pace with the developing and application trend of simulation technology. So in its development process, simulation computer gradually got rid of the customization road, gradually choose a common path. KDRTS (Ke Da real time simulation system),...
Designing an all-electric ship (AES) requires testing of the interaction between hundreds of interconnected power electronic subsystems built by different manufacturers. Such integration tests require large analog test benches or the use of actual equipment during system commissioning. Fully digital simulators can also be used to perform Hardware-in-the-Loop (HIL) integration tests to evaluate the...
In this article, the rapid prototyping technology is used to develop a hardware-in-the-loop simulation system for the diesel engine electronic control unit development. The hardware- in-the-loop simulation is based on Linux RTAI system, an open source hard real-time extension of the Linux Operating System, at low costs and within industrial standards. It exploits standard x86-based computing platforms...
Based on the study of MATLAB/RTW function,a hardware-in the loop experiment simulation system is designed. In this platform, data transmission between practical process and MATLAB workshop was carried out by an I/O card supported by MATLAB, so that the practical system was imported to the simulation loop, the integration of system modelling, analysis, digital simulation and goal realization is realized...
Multi-rate simulation techniques offer advantages to the computer simulation of large scale dynamic systems. Each part of the system is solved using the most appropriate time step and numerical integration method. The approach can be particularly advantageous in real-time applications, where it is essential to complete each set of calculations in the allotted real-time interval. The ESL simulation...
The performance of ESC system is greatly influenced by vehicle design factor and tire performance. But many car maker develop the vehicle can have variability to meet the variety consumer requirement of several countries. ESC system also should be developed with considering the chassis configuration of vehicle and being satisfied the requirement. So, robust control algorithm and value-added-function...
To satisfy the need of hardware-in-the-loop simulation of infrared imaging sensor, a method of dynamic infrared scene generation based on infrared modeling is proposed. Infrared scene generation is divided into three parts, including infrared calculation, infrared scene 3D modeling and program and code for relation simulation. Multigen Creator and Vega are used as a high performance software environment...
Real time simulation is becoming an essential simulation environment for engineering design, especially in power systems. This paper discusses two real time simulators applied to power system simulation: real time digital simulator (RTDS) and National Instruments-PXI (PCI eXtensions for Instrumentation). RTDS is an efficient tool for the design, development, and testing of power system and its components...
The demands of modern applications for ever increasing performance for real-time simulations have posed considerable challenges to simulation developers which are still not fully met. An effective response to these challenges has involved an interesting combination of a return to old-style programming techniques such as multi-rate simulation and low-level program design with a focus on individual...
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