Solar power towers(SPTs)are a leading concentrated solar power(CSP)technology,utilizing heliostat fields to direct solar radiation onto a central receiver.Accurate simulation tools are vital for optimizing these syste...Solar power towers(SPTs)are a leading concentrated solar power(CSP)technology,utilizing heliostat fields to direct solar radiation onto a central receiver.Accurate simulation tools are vital for optimizing these systems.This review offers a structured and comparative analysis of simulation platforms used in optical,thermal,and system-level modeling.Tools such as SolTrace,Tonatiuh,and DELSOL are reviewed for their ray-tracing accuracy and computational trade-offs.Thermal and CFD tools,including OpenFOAM,ANSYS Fluent,and COMSOL,are evaluated for heat transfer modeling.System-level tools,such as SAM,TRNSYS,and Dymola,are assessed for techno-economic analysis and control strategy development.Rather than relying on standardized test cases,the comparison adopts consistent evaluation metrics such as modeling scope,integration ability,computational efficiency,and validation status,derived from field-tested case studies and empirical benchmarks.The review highlights that while several tools demonstrate high accuracy and real-world validation,persistent gaps remain in multi-domain interoperability and real-time modeling.Key contributions include a hybrid simulation framework integrating ray tracing and CFD for receiver modeling,a performance-based classification of tools grounded in validated case studies,and a decision-making roadmap for tool selection based on design context.Future directions include AI-based heliostat aiming using IUPSO,surrogate models for heat transfer prediction,and objectoriented digital twin architectures built on SolarTherm with real-time sensor integration to improve predictive accuracy,scalability,and deployment readiness.展开更多
In order to get rid of the dependence on high-precision centrifuges in accelerometer nonlinear coefficients calibration,this paper proposes a system-level calibration method for field condition.Firstly,a 42-dimension ...In order to get rid of the dependence on high-precision centrifuges in accelerometer nonlinear coefficients calibration,this paper proposes a system-level calibration method for field condition.Firstly,a 42-dimension Kalman filter is constructed to reduce impact brought by turntable.Then,a biaxial rotation path is designed based on the accelerometer output model,including orthogonal 22 positions and tilt 12 positions,which enhances gravity excitation on nonlinear coefficients of accelerometer.Finally,sampling is carried out for calibration and further experiments.The results of static inertial navigation experiments lasting 4000 s show that compared with the traditional method,the proposed method reduces the position error by about 390 m.展开更多
In order to deal with the limitations during the register transfer level verification, a new functional verification method based on the random testing for the system-level of system-on-chip is proposed.The validity o...In order to deal with the limitations during the register transfer level verification, a new functional verification method based on the random testing for the system-level of system-on-chip is proposed.The validity of this method is proven theoretically.Specifically, testcases are generated according to many approaches of randomization.Moreover, the testbench for the system-level verification according to the proposed method is designed by using advanced modeling language.Therefore, under the circumstances that the testbench generates testcases quickly, the hardware/software co-simulation and co-verification can be implemented and the hardware/software partitioning planning can be evaluated easily.The comparison method is put to use in the evaluation approach of the testing validity.The evaluation result indicates that the efficiency of the partition testing is better than that of the random testing only when one or more subdomains are covered over with the area of errors, although the efficiency of the random testing is generally better than that of the partition testing.The experimental result indicates that this method has a good performance in the functional coverage and the cost of testing and can discover the functional errors as soon as possible.展开更多
Several probabilistic fatigue evaluation models have been proposed,but the effectiveness and accuracy of current models have not yet been examined.In this work,probabilistic fatigue life is linked to an energy-based d...Several probabilistic fatigue evaluation models have been proposed,but the effectiveness and accuracy of current models have not yet been examined.In this work,probabilistic fatigue life is linked to an energy-based damage parameter,where the statistic of logarithmic fatigue life is represented by this parameter.Taking into account the variability in loading amplitudes and material properties,a novel fatigue reliability assessment method for structural system is proposed,based on the probabilistic fatigue model and loading cycle-failure life interference principle.A series of strain-controlled fatigue tests of Inconel 718 alloy are conducted for model development and fatigue data with different strain ratios are collected from open literature to verify the model applicability.The results show that the proposed model aligns most closely with experimental data when compared to traditional probability-strain-life models,Xie's modified model,Castillo's model,and Correia's model.Furthermore,a turbine fir-tree attachment is taken as an instance to illustrate the implementation procedure for fatigue reliability analysis.It is evident that the proposed method mitigates the overly con-servative estimates typically provided by independent treatments in structural system reliability assessments.This research proposes a method for accurate evaluations of material-level fatigue life and system-level relia-bility supports reliability-centered design and life management of crucial structures.展开更多
基金supported by the Higher Education Commission,Pakistan and PETRONAS-Malaysia via grant YUTP-FRG(Cost Center No:015LC0-544).
摘要Solar power towers(SPTs)are a leading concentrated solar power(CSP)technology,utilizing heliostat fields to direct solar radiation onto a central receiver.Accurate simulation tools are vital for optimizing these systems.This review offers a structured and comparative analysis of simulation platforms used in optical,thermal,and system-level modeling.Tools such as SolTrace,Tonatiuh,and DELSOL are reviewed for their ray-tracing accuracy and computational trade-offs.Thermal and CFD tools,including OpenFOAM,ANSYS Fluent,and COMSOL,are evaluated for heat transfer modeling.System-level tools,such as SAM,TRNSYS,and Dymola,are assessed for techno-economic analysis and control strategy development.Rather than relying on standardized test cases,the comparison adopts consistent evaluation metrics such as modeling scope,integration ability,computational efficiency,and validation status,derived from field-tested case studies and empirical benchmarks.The review highlights that while several tools demonstrate high accuracy and real-world validation,persistent gaps remain in multi-domain interoperability and real-time modeling.Key contributions include a hybrid simulation framework integrating ray tracing and CFD for receiver modeling,a performance-based classification of tools grounded in validated case studies,and a decision-making roadmap for tool selection based on design context.Future directions include AI-based heliostat aiming using IUPSO,surrogate models for heat transfer prediction,and objectoriented digital twin architectures built on SolarTherm with real-time sensor integration to improve predictive accuracy,scalability,and deployment readiness.
基金supported by the National Natural Science Foundation of China(42276199).
摘要In order to get rid of the dependence on high-precision centrifuges in accelerometer nonlinear coefficients calibration,this paper proposes a system-level calibration method for field condition.Firstly,a 42-dimension Kalman filter is constructed to reduce impact brought by turntable.Then,a biaxial rotation path is designed based on the accelerometer output model,including orthogonal 22 positions and tilt 12 positions,which enhances gravity excitation on nonlinear coefficients of accelerometer.Finally,sampling is carried out for calibration and further experiments.The results of static inertial navigation experiments lasting 4000 s show that compared with the traditional method,the proposed method reduces the position error by about 390 m.
基金supported by the National High Technology Research and Development Program of China (863 Program) (2002AA1Z1490)Specialized Research Fund for the Doctoral Program of Higher Education (20040486049)the University Cooperative Research Fund of Huawei Technology Co., Ltd
摘要In order to deal with the limitations during the register transfer level verification, a new functional verification method based on the random testing for the system-level of system-on-chip is proposed.The validity of this method is proven theoretically.Specifically, testcases are generated according to many approaches of randomization.Moreover, the testbench for the system-level verification according to the proposed method is designed by using advanced modeling language.Therefore, under the circumstances that the testbench generates testcases quickly, the hardware/software co-simulation and co-verification can be implemented and the hardware/software partitioning planning can be evaluated easily.The comparison method is put to use in the evaluation approach of the testing validity.The evaluation result indicates that the efficiency of the partition testing is better than that of the random testing only when one or more subdomains are covered over with the area of errors, although the efficiency of the random testing is generally better than that of the partition testing.The experimental result indicates that this method has a good performance in the functional coverage and the cost of testing and can discover the functional errors as soon as possible.
基金Supported by National Key Research and Development Program(Grant No.2022YFB4602100)National Natural Science Foundation of China(Grant Nos.U21B2077,52130511,52305152).
摘要Several probabilistic fatigue evaluation models have been proposed,but the effectiveness and accuracy of current models have not yet been examined.In this work,probabilistic fatigue life is linked to an energy-based damage parameter,where the statistic of logarithmic fatigue life is represented by this parameter.Taking into account the variability in loading amplitudes and material properties,a novel fatigue reliability assessment method for structural system is proposed,based on the probabilistic fatigue model and loading cycle-failure life interference principle.A series of strain-controlled fatigue tests of Inconel 718 alloy are conducted for model development and fatigue data with different strain ratios are collected from open literature to verify the model applicability.The results show that the proposed model aligns most closely with experimental data when compared to traditional probability-strain-life models,Xie's modified model,Castillo's model,and Correia's model.Furthermore,a turbine fir-tree attachment is taken as an instance to illustrate the implementation procedure for fatigue reliability analysis.It is evident that the proposed method mitigates the overly con-servative estimates typically provided by independent treatments in structural system reliability assessments.This research proposes a method for accurate evaluations of material-level fatigue life and system-level relia-bility supports reliability-centered design and life management of crucial structures.