Method and system for reducing audible and/or electrical noise from electrically or mechanically excited capacitors

A transmission system, comprising:

• a torque converter including a clutch operably disposed between an engaged position and a disengaged position;
• an input shaft to be rotatably driven by an engine;
• an output shaft for transferring torque to an axle;
• a first sensor coupled to an input of the torque converter to detect a rotational speed input to the torque converter;
• a second sensor coupled to the input shaft to detect a rotational speed of the input shaft;
• a third sensor coupled to the output shaft to detect a rotational speed of the output shaft;
• a planetary gear system including a plurality of friction devices selectively engageable to achieve one of a plurality of ranges;
• an electro-hydraulic system fluidly coupled to the planetary gear system via one or more fluid paths;
• and
• a transmission control circuit comprising an electronic device adapted to reduce audible or electrical noise from electrically or mechanically excited capacitors, the electronic device including:
• a supporting structure having a top face and a bottom face, the bottom face being opposite the top face;
• a first capacitor device coupled to the top face of the supporting structure;
• and
• a second capacitor device coupled to the bottom face of the supporting structure substantially opposite of the first capacitor device, the second capacitor device having substantially similar properties to the first capacitor device;
• wherein, the transmission control circuit is disposed in electrical communication with at least the electro-hydraulic system for controlling the transmission system;
• wherein the first capacitor device and the second capacitor device are symmetrically mounted to the respective top and bottom faces of the supporting structure opposite one another and in alignment with one another to substantially cancel undesirable noise effects resulting from time varying control signals received by the first and second capacitor devices;
• wherein the transmission control circuit operably controls movement of the clutch between the engaged position and the disengaged position;
• and wherein the first, second, and third sensors are disposed in electrical communication with the transmission control circuit.