Operating in parallel with the structural integrity field systems is the inertial damping field system (IDF). The IDF generates a controlled series of variable-symmetry force fields that absorb the inertial forces of space flight that would otherwise kill the crew. The IDF is generated independently from the SIF, but is fed by a parallel series of wave guides that are then conducted through synthetic gravity plates.

The IDF maintains a low-level force-field throughout the vessel's habitable volume, this field has a strength of approximately 75 millicochranes with field differential limited to 5.26 nanocochranes per meter (per SFRA-standard 352.12 for crew exposure to subspace fields).

As the computer anticipates acceleration effects the IDF field is distorted along a vector diametrically opposed to the velocity change. The IDF therby absorbs the inertial potential which would otherwise have acted on the crew and internal systems of the vessel.

There is a characteristic lag-time for the shifting of IDF direction and intensity. This lag varies with the net acceleration involved, but averages 295 millicochranes for normal impulse maneuvers. Because IDF control is generally derived from Flight Control data, normal course corrections can be anticipated so there is rarely any noticeable acceleration to the crew. Exceptions to this sometimes occur when power for IDF operations is restricted or when sudden maneuvers or other externally caused accelerations occur more rapidly than the system can respond.

Flux generation for the IDF consists of clusters of 500 kW graviton polarity sources feeding 150 millicohrane subspace field distortion amplifiers. The system is cooled by liquid helium coolant loops, each having a heat dissipated rate of 100,000 MJ/hr. Starfleet vessels have several backup IDF generators, each providing 65% of maximum rated power for up to 12 hrs.
The normal duty cycle for generators is 48 hrs between standard maintenance procedures, the graviton polarity sources are rated for 2,500 operating hours between routine servicing of super-conductive elements.