Energy feedback suspension system linear motor supercapacitor mode switching method

The invention discloses an energy feedback suspension system linear motor supercapacitor mode switching method, which comprises the steps of 1, determining the minimum initial terminal voltage of a supercapacitor required by covering a motor optimal operating point through analyzing influences imposed on motor damping characteristics by variations in initial terminal voltage of the supercapacitor and being combined with the linear motor optimal operating point extracted by active control of an LQG controller; and 2, analyzing influences imposed on recovered energy of the supercapacitor by the initial terminal voltage of the supercapacitor at different duty ratios, and finally determining upper and lower thresholds of a charging and discharging operating mode of the supercapacitor by combining the minimum initial terminal voltage of the supercapacitor and the influences. The method disclosed by the invention can improve the energy recovery efficiency of an energy feedback suspension system while ensuring motor operating force requirements, that is, the vehicle handling stability, and thus reduces the fuel consumption of a vehicle body.