Smart building uncertainty analysis via adaptive Lasso

• Main Authors: Bingqing Lin, Bei Yu
• Format: Article
• Language: English
• Published: Wiley 2017-03-01
• Series: IET Cyber-Physical Systems
• Subjects: building management systems; energy consumption; statistical analysis; uncertainty handling; polynomials; parameter estimation; environmental factors; smart building uncertainty analysis; adaptive Lasso; parameter identification; building energy consumption; building performance simulation; environmental parameters; physical parameters; automatic parameter selection; computational efficiency; quadratic polynomial; higher order polynomial
• Online Access: https://digital-library.theiet.org/content/journals/10.1049/iet-cps.2017.0011

Uncertainty analysis plays a pivotal role in identifying the important parameters affecting building energy consumption and estimate their effects at the early design stages. In this work, we consider the adaptive Lasso for uncertainty analysis in building performance simulation. This procedure has several appealing features: (1) We can introduce a large number of possible physical and environmental parameters at the initial stage to obtain a more complete picture of the building energy consumption. (2) The procedure could automatically select parameters and estimate influences simultaneously and no prior knowledge is required. (3) Due to computational efficiency of the procedure, non-linear relationship between the building performance and the input parameters could be accommodated. (4) The proposed adaptive Lasso can use a small number of samples to achieve high modeling accuracy and further reduce the huge computational cost of running building energy simulation programs. Furthermore, we propose a stable algorithm to rank input parameters to better identify important input parameters that affect energy consumption. A case study shows the superior performance of the procedure compared with LS and OMP in terms of modeling accuracy and computational cost.