A damping system comprising: a generator ; a drive shaft coupled to the generator ; a DC link capacitor across a load resistance ; a DC link voltage across the load resistance ; a ripple sensor connected to the generator or the drive shaft by mechanical, electrical or wireless means, and configured to: measure a speed ripple amplitude of the drive shaft ; and provide an indication of at least one of: a speed, a torque, a horsepower, a frequency, or an acceleration of the drive shaft ; characterized in that the damping system comprises a feedforward circuit connected to the generator and the ripple sensor and comprising a module configured to: determine a DC link phase angle formed by the load resistance and a load capacitance of the DC link capacitor , the DC link phase angle defining a power-to-voltage relationship for an RC load of the generator, the RC load comprising the load resistance in parallel with the load capacitance ; calculate a voltage signal value based on the speed ripple amplitude and the DC link phase angle ; and adjust the DC link voltage according to the voltage signal value , thereby to provide a damping power in the RC load that dampens a torsional oscillation in the drive shaft . a generator ; a drive shaft coupled to the generator ; a DC link capacitor across a load resistance ; a DC link voltage across the load resistance ; a ripple sensor connected to the generator or the drive shaft by mechanical, electrical or wireless means, and configured to: measure a speed ripple amplitude of the drive shaft ; and provide an indication of at least one of: a speed, a torque, a horsepower, a frequency, or an acceleration of the drive shaft ; characterized in that the damping system comprises a feedforward circuit connected to the generator and the ripple sensor and comprising a module configured to: determine a DC link phase angle formed by the load resistance and a load capacitance of the DC link capacitor , the DC link phase angle defining a power-to-voltage relationship for an RC load of the generator, the RC load comprising the load resistance in parallel with the load capacitance ; calculate a voltage signal value based on the speed ripple amplitude and the DC link phase angle ; and adjust the DC link voltage according to the voltage signal value , thereby to provide a damping power in the RC load that dampens a torsional oscillation in the drive shaft . measure a speed ripple amplitude of the drive shaft ; and provide an indication of at least one of: a speed, a torque, a horsepower, a frequency, or an acceleration of the drive shaft ; characterized in that the damping system comprises a feedforward circuit connected to the generator and the ripple sensor and comprising a module configured to: determine a DC link phase angle formed by the load resistance and a load capacitance of the DC link capacitor , the DC link phase angle defining a power-to-voltage relationship for an RC load of the generator, the RC load comprising the load resistance in parallel with the load capacitance ; calculate a voltage signal value based on the speed ripple amplitude and the DC link phase angle ; and adjust the DC link voltage according to the voltage signal value , thereby to provide a damping power in the RC load that dampens a torsional oscillation in the drive shaft . determine a DC link phase angle formed by the load resistance and a load capacitance of the DC link capacitor , the DC link phase angle defining a power-to-voltage relationship for an RC load of the generator, the RC load comprising the load resistance in parallel with the load capacitance ; calculate a voltage signal value based on the speed ripple amplitude and the DC link phase angle ; and adjust the DC link voltage according to the voltage signal value , thereby to provide a damping power in the RC load that dampens a torsional oscillation in the drive shaft . <EOS>