| abstract |
A method for estimating parameters and the state of a dynamical system of an electric vehicle. A multi-time scale model of the dynamical system is set up; a parameter observer AEKF θ based on a macroscopic time scale and a state observer AEKF x based on a microcosmic time scale in the dynamical system of the electric vehicle are initialized; time update is performed on the parameter observer AEKF θ , the updating time span is one macroscopic time scale, and a priori estimation value θ^ 1 ¯, at the moment t 1,0 , of the parameter θ is obtained; time update and measurement update are performed on the state observer AEKF x and circulated L times, so that the time of the state observer AEKF x is updated to the moment t 0,L ; and measurement update is performed on the parameter observer AEKF θ , and the operation is circulated until the estimation is finished. By means of the method, the parameters and the state of the dynamical system of the electric vehicle are estimated, the precision is high, the calculation time is short, and calculation costs are reduced. |