Identification Algorithm of Expressway Steady-state Speed-density Equilibrium Relational Expression
Xu-Hua Yang, Wang Wan-liang · Journal of Highway and Transportation Research and Development · 2006
This paper proposes a novel identification algorithm for the expressway steady state speed-density equilibrium relational expression of the Markos Papageorgiou's expressway traffic flow model.Two stages are involved.The first step is to turn this relational expression from nonlinear model to linear model using power series principle,then using the least squares method to identify the linear model and further get all parameters of the nonlinear model.So,the identification to the expressway steady-state speed-density equilibrium relational expression can be achieved.Both theory analysis and simulation research show that comparing conventional nonlinear identification algorithm,this algorithm greatly improves operating speed of model identification and can achieve arbitrary identification accuracy.