The research presented developed a hardware-in-the-loop system for testing in-truck safety technology. The paper describes the hardware and software components that were required to develop the system, how the various...
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The research presented developed a hardware-in-the-loop system for testing in-truck safety technology. The paper describes the hardware and software components that were required to develop the system, how the various components were integrated, and some initial validation tests of the system. Specifically, the paper describes how the hardware-in-the-loop system interacted with the TruckSim simulator to produce realistic results. The models used for the validation of the system are detailed;a demonstration of the system validity follows. The absolute and relative errors between the TruckSim simulation results and the hardware-in-the-loop simulation were demonstrated by a comparison of the temporal variation in velocity and the truck roll angle. The study demonstrated the benefits of an accurate hardware-in-the-loop system for testing future in-vehicle safety systems.
This paper deals with the current state-of-the-art in interfacing issues related to real-time digital simulators employed in the simulation of power systems and power-electronic systems. This paper provides an overvie...
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This paper deals with the current state-of-the-art in interfacing issues related to real-time digital simulators employed in the simulation of power systems and power-electronic systems. This paper provides an overview of technical challenges encountered and their solutions as the real-time digital simulators evolved. hardware-in-the-loop interfacing for controller hardware and power apparatus hardware are also presented.
The attitude of underwater intelligent munition is difficult to be determined because its movement on near surface is subject to wind, wave and ocean current disturbance. An ocean wave model was established in the mat...
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The attitude of underwater intelligent munition is difficult to be determined because its movement on near surface is subject to wind, wave and ocean current disturbance. An ocean wave model was established in the mathematical and hardware-in-the-loop simulation stages. An attitude determination algorithm was given based on magnetic, angular rate, and gravity (MARG) sensors combining with the ocean wave model. The mathematical and hardware-in-the-loop simulation tests of the underwater intelligent munitions were carried out. The test results show that the attitude determination methods discussed in this paper can effectively resist the complex interference. The results provide a reference for the design of the attitude control system and the shipping test of the underwater intelligent munitions.
hardware-in-the-loop (HiL) simulation is a tried and tested method for network testing of an entire system and also for testing single functions and components. HiL systems not only have to meet requirements that are ...
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hardware-in-the-loop (HiL) simulation is a tried and tested method for network testing of an entire system and also for testing single functions and components. HiL systems not only have to meet requirements that are due to specialization/task division among HiL engineers, they also have to be flexible to optimally support development projects. HiL simulation must be performed as early as possible within the development process. dSpace has created a new HiL simulator platform, Scalexio, which reaches a new level of channel flexibility, granular extensibility, and complete software configuration, resulting in full project flexibility and complete system documentation. This concept also carries advantages for classic bench setups, in which the simulator's I/O has to be integrated as close as possible to the ECU to minimize cable lengths.
Flow-valve modelling and wheel-slip control are investigated for an automotive hydraulic braking system which uses flow valves to supply brake fluid into the wheel cylinder and on/off valves to exhaust the brake fluid...
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Flow-valve modelling and wheel-slip control are investigated for an automotive hydraulic braking system which uses flow valves to supply brake fluid into the wheel cylinder and on/off valves to exhaust the brake fluid. First, the model of the flow valve is built using an experiment method, since its mechanism is difficult to analyse. Furthermore, because of the intrinsic difference between the two distinct valves, a special control problem is raised concerning how to realize wheel-slip control by using a unified strategy. Considering the essential characteristics of the two valves, a hybrid control approach, which contains an ordinary, continuous, state feedback function and a supervisory logic rule, is explored. Then, one feasible solution is obtained based on Lyapunov theory in the Filippov framework, so that the convergence of the control system is strictly guaranteed in theory. The controller has few tuning parameters and it is simple to tune. Illustrative hardware-in-the-loop simulation tests are carried out. The results show that both braking efficiency and ride quality are achieved, even if there are errors in the actuator control as well as in estimation of vehicle speed.
In this paper a sliding-mode yaw moment controller and fuzzy logic wheel slip controller are proposed to enhance vehicle stability in a split-mu manoeuvre. The proposed wheel slip controller shows good performance in ...
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In this paper a sliding-mode yaw moment controller and fuzzy logic wheel slip controller are proposed to enhance vehicle stability in a split-mu manoeuvre. The proposed wheel slip controller shows good performance in improving vehicle handling in a braking manoeuvre. However, when a braking manoeuvre was conducted under the split-mu condition, the yaw moment generated by the asymmetric braking forces may cause the vehicle-handling stability to deteriorate. The sliding-mode yaw moment controller was introduced to regulate the wheel slip controller to improve the vehicle-handling performance. A target slip allocation algorithm was employed to coordinate the control conflict between the anti-lock braking system and vehicle stability control. First, the proposed control system was evaluated through pure computer simulation and a hardware in-the-loopsimulation system. Then an experimental test was also introduced to verify the effectiveness of the proposed control system.
This paper presents the hardware-in-the-loop simulations of a hybrid flight control system for a light aircraft consisting of mechanical, electromechanical and digital components. The simulation was performed at a lig...
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ISBN:
(纸本)9781467316996
This paper presents the hardware-in-the-loop simulations of a hybrid flight control system for a light aircraft consisting of mechanical, electromechanical and digital components. The simulation was performed at a light aircraft simulation lab SimStar at Brno University of Technology. The aim was the validation and verification of the operational suitability of the flight control system's peripherals - electromechanical actuators, autopilot mode selection panel and a primary flight display. The investigated peripheral devices were connected to SimStar's network using CANaero communication protocol. The simulations were focused on the real time automatic flight control modes operational scenarios.
This paper explains the FPGA implementation of a Permanent Magnet Synchronous Motor (PMSM) model using the latest JMAG-RT Finite-Element-Analysis software's real-time models: variable-DQ and Spatial Harmonic. In t...
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ISBN:
(纸本)9781467319706
This paper explains the FPGA implementation of a Permanent Magnet Synchronous Motor (PMSM) model using the latest JMAG-RT Finite-Element-Analysis software's real-time models: variable-DQ and Spatial Harmonic. In the variable-DQ (VDQ) model, the DQ inductances are varied according to the saturation level and a sinusoidal back-EMF is assumed. In the Spatial Harmonic (SH) model, the instantaneous magnetisation state is used to integrate the model;differential inductance and non-sinusoidal back-EMF are considered for all possible points of operation, resulting in improved precision, especially in transient states. The SH model also includes torque and current harmonics contents induced by machine slots and back-EMF spatial configurations. Both VDQ and SH models are implemented in a ML605 FPGA board running in the RT-LAB real-time simulation environment.
The paper investigates a FPGA implementation of a simple observer aiming to improve the speed estimation behavior and to make a step towards a SOPC PMSM drive sensor-less control. The proposed approach is based on the...
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ISBN:
(纸本)9781424407835
The paper investigates a FPGA implementation of a simple observer aiming to improve the speed estimation behavior and to make a step towards a SOPC PMSM drive sensor-less control. The proposed approach is based on the fast processing provided by the FPGA implementation, allowing to accurately reproduce the continuous time sliding mode and to realize high performance FIR filters. Such filters allow an accurate reconstruction of the position signal by means of phase compensation, and lead to an accurate speed estimation based on the zero-crossing detection of the commutation signals. Moreover, a fast current controller is considered. The paper focuses the whole design flow and confirms the feasibility of the approach by means of hardware in the loopsimulation.
This paper presents a Field Programmable Gate Array (FPGA) based real-time digital simulator for power electronic apparatus based on an realistic device-level behavioral model. A 3-level 12-pulse Voltage Source Conver...
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ISBN:
(纸本)9781457710018
This paper presents a Field Programmable Gate Array (FPGA) based real-time digital simulator for power electronic apparatus based on an realistic device-level behavioral model. A 3-level 12-pulse Voltage Source Converter (VSC) fed induction machine drive is implemented on the FPGA. The VSC model is computed at a fixed time-step of 12.5ns allowing an realistic representation of the IGBT nonlinear switching characteristics and power losses. The simulator also models a squirrel-cage induction machine, a direct field-oriented control system, and a pulse-width modulator to achieve the real-time simulation of the complete drive system. All the models have been implemented using VHDL. Real-time simulation results have been validated using measured device-level IGBT characteristics.
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