ABSTRACT
Selection and estimation of Bondgraph models in simulation process for a developed expert system are discussed. Simple Bondgraph models for hydraulic pipelines are presented and dimensionless transfer matrices for the pipeline models are derived and compared with the distributed parameter models including Bessel functions in frequency domains. A correlation coefficient in frequency domains between the distributed parameter modes and the simple Bondgraph models is introduced into the quantitative estimation of the pipeline models for an index. By introducing the correlation coefficient, selection and estimation of pipeline models make it easy for nonprofessional persons to perform the process to be repeatedly executed as modifying components of a hydraulic circuit.
