scholarly journals Calculation and Verification of the Real-Time Working Characteristics of a Viscous Coupling

2021 ◽  
Vol 11 (3) ◽  
pp. 1110
Author(s):  
Liqiang Jin ◽  
Xianglong Peng ◽  
Dehai Wang ◽  
Desheng Guo ◽  
Biao Chen
Keyword(s):  
Internal Pressure ◽  
Real Time ◽  
Silicone Oil ◽  
Operation Mode ◽  
Ideal Gas ◽  
Calculation Model ◽  
Transfer Model ◽  
Viscous Coupling ◽  
The Real ◽  
Root Cause

During operation, the shear friction between the silicone oil and the plates of a viscous coupling (VC) will generate heat and increase the temperature of the silicone oil, inflate the volume, increase the internal pressure, and eventually deliver more torque, in what is called hump operation mode. Temperature is the root cause of the change of the operation characteristics in VCs. In this paper, the heat-transfer model for a VC is established based on the thermodynamical theory. The capacity of the heat transmission of each part of the VC are calculated to obtain the temperature of silicone oil. The real-time shear torque of the VC is finally obtained. Then, the theoretical analysis on hump phenomenon was done. The internal pressure was obtained by analyzing the characteristics of ideal gas, and the maximum torque during the hump phenomenon was calculated. The simulation of the key parameters and the entire working process for the VC were carried out based on the proposed calculation model. A prototype of a viscous limited-slip differential (VLSD) was developed to test the output torque characteristics. The test results were quite consistent with the simulation results, and the accuracy of the calculation model was verified.

A Research on Suppression of SSO Based on the Real Time Digital Simulation

2013 ◽  
Vol 732-733 ◽  
pp. 1415-1419 ◽  
Author(s):  
Chun Lin Guo ◽  
Jian Ting Xu ◽  
Yang Zhao ◽  
Xiang Ning Xiao
Keyword(s):  
Real Time ◽  
Digital Simulation ◽  
Operation Mode ◽  
System Model ◽  
The Real ◽  
Model Based ◽  
Operation Modes ◽  
Simulation Results

According to the first project using SVC to mitigate SSO in China, this paper builds the system model based on real time digtal simulator,and gives an introduction to the sysem model. Under typical operation mode and fault conditions,the performance of SVC is fully validated,it also analysis and comparise the performance of SVC under different operation modes. Simulation results show that the SVC can mitigate the SSO phenomenon.

The Review on the Topology of Battery-Supercapacitor Hybrid System Applied into the Real-Time Wind Power Suppression

2013 ◽  
Vol 860-863 ◽  
pp. 287-292 ◽  
Author(s):  
Peng Yu ◽  
Guang Lei Li ◽  
Yong Zhang ◽  
Yan Cheng ◽  
Shu Min Sun ◽  
...  
Keyword(s):  
Energy Storage ◽  
Real Time ◽  
Wind Power ◽  
Hybrid System ◽  
Storage System ◽  
Operation Mode ◽  
Energy Storage System ◽  
High Energy ◽  
The Real ◽  
Power Regulation

The energy storage technique is one of the most effective means for the real-time wind power regulation. Firstly, this paper discussed the operation mode of energy storage system for real-time wind power regulation. At the same time, we proposed that the energy storage system applied into the real-time wind power regulation should be of the properties of high power density, high energy density and long cycle life. By analyzing the properties of battery and supercapacitor, we arrive at the conclusion that the battery-supercapacitor hybrid system obtains the enhanced characteristics to meet the performance requirement for energy storage system. In order to achieve the real-time wind power suppression, we carried out a comparative research on the topology of battery-supercapacitor hybrid system. The operation mode of each topology was discussed. From the standpoint of practical engineering, the merits and deficiencies of each topology were explored.

scholarly journals Research on the Real-time Calculation Model for Transient Temperature Rise of Duct-Laid Cable

2019 ◽  
Vol 631 ◽  
pp. 052034
Author(s):  
Wenrong Si ◽  
Chenzhao Fu ◽  
Honglei Li ◽  
Yongchun Liang ◽  
Zhenpeng Zhang ◽  
...  
Keyword(s):  
Real Time ◽  
Temperature Rise ◽  
Calculation Model ◽  
Transient Temperature ◽  
The Real ◽  
Time Calculation

scholarly journals Assessment of surface solar irradiance derived from real-time modelling techniques and verification with ground-based measurements

2018 ◽  
Vol 11 (2) ◽  
pp. 907-924 ◽  
Author(s):  
Panagiotis G. Kosmopoulos ◽  
Stelios Kazadzis ◽  
Michael Taylor ◽  
Panagiotis I. Raptis ◽  
Iphigenia Keramitsoglou ◽  
...  
Keyword(s):  
Real Time ◽  
Regression Function ◽  
Surface Radiation ◽  
Training Dataset ◽  
Radiative Transfer Model ◽  
Transfer Model ◽  
Surface Solar Radiation ◽  
The Real ◽  
Median Error ◽  
Modelling Techniques

Abstract. This study focuses on the assessment of surface solar radiation (SSR) based on operational neural network (NN) and multi-regression function (MRF) modelling techniques that produce instantaneous (in less than 1 min) outputs. Using real-time cloud and aerosol optical properties inputs from the Spinning Enhanced Visible and Infrared Imager (SEVIRI) on board the Meteosat Second Generation (MSG) satellite and the Copernicus Atmosphere Monitoring Service (CAMS), respectively, these models are capable of calculating SSR in high resolution (1 nm, 0.05∘, 15 min) that can be used for spectrally integrated irradiance maps, databases and various applications related to energy exploitation. The real-time models are validated against ground-based measurements of the Baseline Surface Radiation Network (BSRN) in a temporal range varying from 15 min to monthly means, while a sensitivity analysis of the cloud and aerosol effects on SSR is performed to ensure reliability under different sky and climatological conditions. The simulated outputs, compared to their common training dataset created by the radiative transfer model (RTM) libRadtran, showed median error values in the range −15 to 15 % for the NN that produces spectral irradiances (NNS), 5–6 % underestimation for the integrated NN and close to zero errors for the MRF technique. The verification against BSRN revealed that the real-time calculation uncertainty ranges from −100 to 40 and −20 to 20 W m−2, for the 15 min and monthly mean global horizontal irradiance (GHI) averages, respectively, while the accuracy of the input parameters, in terms of aerosol and cloud optical thickness (AOD and COT), and their impact on GHI, was of the order of 10 % as compared to the ground-based measurements. The proposed system aims to be utilized through studies and real-time applications which are related to solar energy production planning and use.

scholarly journals Assessment of surface solar irradiance derived from real-time modelling techniques and verification with ground-based measurements

2017 ◽  
Author(s):  
Panagiotis G. Kosmopoulos ◽  
Stelios Kazadzis ◽  
Michael Taylor ◽  
Panagiotis I. Raptis ◽  
Iphigenia Keramitsoglou ◽  
...  
Keyword(s):  
Real Time ◽  
Regression Function ◽  
Surface Radiation ◽  
Training Dataset ◽  
Radiative Transfer Model ◽  
Transfer Model ◽  
Surface Solar Radiation ◽  
The Real ◽  
Median Error ◽  
Modelling Techniques

Abstract. This study focuses on the assessment of surface solar radiation (SSR) based on operational Neural Network (NN) and Multi-Regression Function (MRF) modelling techniques that produce instantaneous (in less than one minute) outputs. Using real-time cloud and aerosol optical properties inputs from the Spinning Enhanced Visible and Infrared Imager (SEVIRI) onboard the Meteosat Second Generation (MSG) satellite and the Copernicus Atmosphere Monitoring Service (CAMS), respectively, these models are capable of calculating SSR in high resolution (1 nm, 0.05 degrees, 15 min) that can be used for spectrally-integrated irradiance maps, databases and various applications related with energy exploitation. The real-time models are validated against ground-based measurements of the Baseline Surface Radiation Network (BSRN) in a temporal range varying from 15-min to monthly means, while a sensitivity analysis of the cloud and aerosol effects on SSR is performed to ensure reliability under different sky and climatological conditions. The simulated outputs, compared to their common training dataset created by the radiative transfer model (RTM) libRadtran, showed median error values in the range −15 to 15 % for the NN that produces spectral irradiances (NNS), 5–6 % underestimation for the integrated NN and close to zero errors for the MRF technique. The verification against BSRN revealed that the real-time calculation uncertainty ranges from −100 to 40 W/m2 and −20 to 20 W/m2, for the 15-min and monthly mean Global Horizontal Irradiance (GHI) averages, respectively, while the accuracy of the input parameters, in terms of aerosol and cloud optical thickness (AOD and COT), and their impact on GHI, was of the order of 10% as compared to the ground-based measurements. The proposed system aims to be utilized through studies and real-time applications, which are related with the solar energy production planning and use.

The Real-Time Neural Genesis of a Punchline

2014 ◽  
Author(s):  
Irving Biederman ◽  
Ori Amir
Keyword(s):  
Real Time ◽  
The Real

Real-Time System for Sending Data from Three Clients to One Server with MATLAB

2015 ◽  
Vol 2 (1) ◽  
pp. 35-41
Author(s):  
Rivan Risdaryanto ◽  
Houtman P. Siregar ◽  
Dedy Loebis
Keyword(s):  
Information System ◽  
Real Time ◽  
Time System ◽  
Real Time System ◽  
The Real ◽  
Performance Time ◽  
Data Process ◽  
Effectiveness And Efficiency

The real-time system is now used on many fields, such as telecommunication, military, information system, evenmedical to get information quickly, on time and accurate. Needless to say, a real-time system will always considerthe performance time. In our application, we define the time target/deadline, so that the system should execute thewhole tasks under predefined deadline. However, if the system failed to finish the tasks, it will lead to fatal failure.In other words, if the system cannot be executed on time, it will affect the subsequent tasks. In this paper, wepropose a real-time system for sending data to find effectiveness and efficiency. Sending data process will beconstructed in MATLAB and sending data process has a time target as when data will send.

The real-time computing of the Stirling formula based on hardware acceleration

2013 ◽  
Author(s):  
Jiyang Yu ◽  
Dan Huang ◽  
Siyang Zhao ◽  
Nan Pei ◽  
Huixia Cheng ◽  
...  
Keyword(s):  
Real Time ◽  
Hardware Acceleration ◽  
Stirling Formula ◽  
The Real ◽  
Real Time Computing
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