Accurate Real-time Simulation Research Articles

Dynamic Analytical Platform for Mine Ventilation Networks

Mine disasters frequently occur with serious consequences, so additional research is needed to effectively deal with mine disasters especially the secondary catastrophes. Modularization modeling method was used to develop the dynamic analytical platform for modeling mine ventilation networks. The platform includes models of the ventilation network and the control systems. A small experimental ventilation network was also constructed to validate the platform. The results show that the platform provides accurate real-time simulations of normal operations and accident conditions in the ventilation network. The platform accurately models dynamic spreading of the disaster in the lab with errors of around 5%. Thus, the platform can be used to analyze the mine ventilation systems during accidents and develop methods to prevent the secondary catastrophes and the deterioration of mine disasters.

Real Time Simulation for DC and AC Motors Based on LabVIEW FPGAs

Increased manufacturing expenses and increased competition have made it an automation process to improve the overall operational and energy efficiency at the manufacturing systems. Electric motors impact a wide range of manufacturing equipment, especially the manufacturing equipment that has an advance level of automation. An accurate real time simulation is required for predicting the high-quality motor performance and making the motor systems more reliable and easier to use inside of the complete manufacturing system. FPGAs for real simulation have become both increasingly powerful and increasingly affordable. As a result, the use of highly sophisticated hardware that not only could run high-fidelity simulation of electric motors but also this hardware allows getting result in real time. This paper shows real time simulation models of DC and AC machines on FPGAs in state space. Implementation of the real time numerical integration method with digital logic elements is presented and discussed using fixed point. A real-time simulation of DC and AC machines is carried out on FPGAs platform and real time results are shown. These results are compared to simulation results obtained through commercial off line simulation software.

Real-time simulation of a helicopter rotor on an analog computer

An accurate real-time simulation of a helicopter rotor can be achieved on a high-speed analog computer. By using repetitive operation and integrating along each blade every 2.5 milliseconds, the double integration required to determine rotor torque, thrust, moment, and rearward and sideward rotor forces is accomplished. The lift and drag coefficients are continuously calculated at all points along the blade. The same analog equipment used to calculate quantities for one blade is used for other blades by chang ing appropriate initial conditions. This analysis provides a transient rotor solution in which integration out the blade is accomplished every five rotor azimuth degrees. One console of a Hybrid Systems, Inc., SS-100 Analog/Hybrid Computer is used for the rotor solution.