Logic circuit design for high-speed computing of dynamic response in real-time hybrid simulation using FPGA-based system

2014 ◽  
Vol 14 (6) ◽  
pp. 1131-1150 ◽  
Author(s):  
Akira Igarashi
Keyword(s):  
Dynamic Response ◽  
Real Time ◽  
Circuit Design ◽  
High Speed ◽  
Hybrid Simulation ◽  
Logic Circuit

scholarly journals Adaptive model predictive control for actuation dynamics compensation in real-time hybrid simulation

2021 ◽  
Author(s):  
Nikolaos Tsokanas ◽  
Roland Pastorino ◽  
Bozidar Stojadinovic
Keyword(s):  
Dynamic Response ◽  
Model Predictive Control ◽  
Real Time ◽  
Predictive Control ◽  
Hybrid Simulation ◽  
Adaptive Model ◽  
Actuation System ◽  
Tracking Controller ◽  
Adaptive Model Predictive Control ◽  
Hybrid Simulations

Real-time hybrid simulation is an experimental method used to obtain the dynamic response of a system whose components consist of loading-rate-sensitive physical and numerical substructures. The coupling of these substructures is achieved by actuation systems, i.e., an arrangement of motors or actuators, which are responsible for continuously synchronizing the interfaces of the substructures and are commanded in closed-loop control setting. To ensure high fidelity of such hybrid simulations, performing them in real-time is necessary. However, real-time hybrid simulation poses challenges as the inherent dynamics of the actuation system introduce time delays, thus modifying the dynamic response of the investigated system and hence compromising the simulation's fidelity and trust in the obtained response quantities. Therefore, a reference tracking controller is required to adequately compensate for such time delays.In this study, a novel tracking controller is proposed for dynamics compensation in real-time hybrid simulations. It is based on an adaptive model predictive control approach, a linear time-varying Kalman filter, and a real-time model identification algorithm. Within the latter, auto-regressive exogenous polynomial models are identified in real-time to estimate the changing plant dynamics and used to update the prediction model of the tracking controller. A parametric virtual real-time hybrid simulation case study is used to validate the performance and robustness of the proposed control scheme. Results demonstrate the effectiveness of the proposed controller for real-time hybrid simulations.

Ternary Logic Dynamic CMOS Comparators

2011 ◽  
Vol 317-319 ◽  
pp. 1177-1182 ◽  
Author(s):  
Xin Yu Jin ◽  
Cheng Li ◽  
Jun Biao Liu ◽  
Xiao Feng Jiang ◽  
Xiang Bing Zeng
Keyword(s):  
Power Consumption ◽  
Circuit Design ◽  
High Speed ◽  
Logic Circuit ◽  
New Method ◽  
Low Power Consumption ◽  
Memory Testing ◽  
Ternary Logic ◽  
Dynamic Cell ◽  
Self Test

In this paper, a new method of ternary logic circuit design is developed. It’s proposed that two types of static ternary CMOS comparators and three types of dynamic CMOS comparators, designed by new method, with low transistor count, high speed and low power consumption. The proposed comparators are the rearrangement and reordering of transistors in the evaluation block of a dynamic cell. These ternary comparators can be used as equality comparators, mutual comparators and zero/one/two detectors, which are widely used in build in self test and memory testing.

RF wave visions for circuit analyses and diagnoses by live electrooptic imaging camera

2010 ◽  
Vol 2 (3-4) ◽  
pp. 341-347 ◽  
Author(s):  
Masahiro Tsuchiya ◽  
Takahiro Shiozawa
Keyword(s):  
Wave Propagation ◽  
Electric Field ◽  
Real Time ◽  
High Speed ◽  
Rf Circuits ◽  
Phase Evolution ◽  
Logic Circuit ◽  
Visual Images ◽  
Essential Properties ◽  
Imaging Camera

A novel scheme involving experimental analyses and diagnoses is presented for monitoring radio-frequency (RF) and high-speed circuits. A live electrooptic imaging (LEI) camera is used in the scheme and it provides real-time images of the phase evolution of the RF electric field. Besides, it is demonstrated that essential properties of RF wave propagation are easily grasped from visual images; examples of LEI movies and images from which such essential properties can be identified are presented. The subjects of the LEI observations, analyses, and diagnoses are planar RF circuits and a Gbps-class emitter-coupled-logic circuit. In addition, the results of analyses and diagnoses in the space domain are discussed.

Study and Application of High-Speed Railway Real-Time Dynamic Response Based on Running Simulation

2013 ◽  
Vol 779-780 ◽  
pp. 695-699 ◽  
Author(s):  
Yi Chang Cai ◽  
Hao Pu ◽  
Wei Li ◽  
Jian Li ◽  
Xi An Long ◽  
...  
Keyword(s):  
Dynamic Response ◽  
Real Time ◽  
High Speed ◽  
Original Data ◽  
Creep Theory ◽  
High Speed Railway ◽  
Time Dynamic ◽  
Analysis Process ◽  
Non Linear ◽  
Actual Operation

In order that the vehicle-track dynamic simulation can reflect the actual operation better, the running simulation theory was introduced into the analysis process of the high-speed railway dynamic response. Firstly, the data (including time, mileage, velocity, acceleration, etc.) of train running simulation was worked out by traction calculation. Secondly, according to the structure feature of high-speed railways vehicle and track, the vehicle-track coupled dynamic model was built. Non-linear Hertz theory was used for modeling the wheel-rail contact. Then the wheel-track creep force was obtained by using Kalker's creep theory and Shen's non-linear theory. Meanwhile, various track spectrums were simulated. Furthermore, the running simulation data as the original data were used to work out the real-time dynamic response indices in the dynamic calculation process. Thirdly, the indices would be applied to the alignment comfort evaluation. Finally, the system was developed out and the rationality and practicability of the method were verified through an example.

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