Accelerometer with proof mass displacement reduction feature

A method comprising:

• causing, by a processing circuitry of an accelerometer system, a first current to flow through a first RC circuit and a first coil disposed around a first pole piece of a first magnetic assembly of the accelerometer system to apply a first Lorentz force to a proof mass of the accelerometer system, wherein the first RC circuit reduces a magnitude of the first current;
• causing, by the processing circuitry, a second current to flow through a second RC circuit and a second coil disposed around a second pole piece of a second magnetic assembly of the accelerometer system to apply a second Lorentz force to the proof mass, the second magnetic assembly being different from the first magnetic assembly, wherein the second RC circuit reduces a magnitude of the second current;
• determining, by the processing circuitry, that the first current has been flowing through the first RC circuit and the first pole piece for at least a threshold period of time;
• separating, by the processing circuitry and based on the determination that the first current has been flowing across the first RC circuit and the first pole piece for at least the threshold period of time, the first RC circuit from the first coil and the second RC circuit from the second coil;
• and
• causing, by the processing circuitry, the first current to bypass the first RC circuit and flow through the first coil and the second current to bypass the second RC circuit and flow through the second coil.

An accelerometer system comprising:

• a first excitation ring;
• a second excitation ring;
• a first magnetic assembly comprising a first pole piece and a first magnet configured to generate a first magnetic flux;
• a second magnetic assembly comprising a second pole piece and a second magnet configured to generate a second magnetic flux;
• a power source;
• a proof mass assembly comprising:
• a proof mass between the first magnetic assembly and the second magnetic assembly;
• a first coil disposed around the first pole piece, wherein the first magnetic flux flows from the first excitation ring to the first pole piece across the first coil;
• and
• a second coil disposed around the second pole piece, wherein the second magnetic flux flows from the second excitation ring to the second pole piece across the second coil;
• a first circuit coupling the power source to the first coil, the first circuit comprising a first resistor and a first switch coupled in series to the first resistor;
• a second circuit coupling the power source to the second coil, the second circuit comprising a second resistor and a second switch coupled in series to the second resistor;
• and
• processing circuitry configured to:
• cause a first current to flow from the power source and through the first circuit and the first coil to apply a first Lorentz force to the proof mass;
• cause a second current to flow from the power source and through the second circuit and the second coil to apply a second Lorentz force to the proof mass;
• determine that a threshold period of time has elapsed;
• based on a determination that the threshold period of time has elapsed, close the first switch and the second switch;
• and
• cause the first current to flow from the power source and through the first coil bypassing the first circuit;
• and
• cause the second current to flow from the power source and through the second coil bypassing the second circuit.