To make the superconducting magnetically levitated transport (maglev) system more attractive, it has been important to enhance the ride comfort by controlling vehicle vibration. Maglev vehicle vibrations have been reduced in previous experiments by controlling only the secondary suspension between the car bodies and bogies. However, by doing so, it has been difficult to reduce vibration for the characteristic and relatively high frequencies of the primary suspension between the bogies and guideway. Recently, control of the primary suspension is being considered. Power collecting coils of a linear generator system, which is being tested as an onboard power source, can also generate additional forces that can be used to control vibrations. Because this type of vibration control can apply damping directly to the primary suspension, it can reduce vibrations of relatively higher frequencies that are difficult to reduce by controlling only the secondary suspension. A maglev vehicle model that focuses on vertical and pitching motions is used to examine the effectiveness of reducing vibrations by using a linear generator damping force control in the primary suspension and linear quadratic (LQ) control of the actuators in the secondary suspension. Experimental results using the linear generator on a full-scale maglev vehicle on the Yamanashi Maglev Test Line are described.

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