Research on a fast calculation method of feedback loop of system dynamics
Aiming at the problems of long computation time,error-prone results,and difficulty in verification associated with the traditional determinant feedback loop calculation method in system dynamics,a rapid calculation method for system dynam-ics feedback loops was proposed.This method utilizes the Loops function of Vensim software,the feedback loop set of the sys-tem was generated by taking each level bit variable as the starting point,followed by the removal of duplicate feedback loops to obtain a set of all non-repetitive feedback loops in the system.Taking the"Base+Farmers"supply chain complex system of Mingxin Farm in Pingxiang as an example,11 strongly simplified flow rate basic in-tree models that have been constructed,and both the determinant calculation method and this new method were used to compute all feedback loops in the system.The re-search showed that both methods yielded the same results,but the fast calculation method of the feedback loop significantly re-duced the calculation time and improved the calculation accuracy.Based on this,the system structure can be deeply analyzed to put forward corresponding management countermeasures.
万方数据
维普
