Three axis inertial measurement unit with counterbalanced, low inertia mechanical oscillator
First Claim
1. A three axis inertial measurement unit, comprising:
- two platforms counterbalanced against each other mounted as a mechanical oscillator for dithered rotation at a natural frequency of said platforms about a single torsional axis;
a plurality of accelerometers mounted on at least one of said platforms;
each accelerometer having at least an input axis;
said plurality of accelerometers mounted upon said at least one platform such that said input axis of each accelerometer is at a predetermined angle to said single torsional axis and said platform;
said platforms each having;
a three legged, Y-shaped mounting member;
a rotor member positioned between the legs of said mounting member;
web members forming said legs of said Y-shaped mounting member to join said rotor member; and
driving webs mounted on each side of said web members for further joining said mounting member to said rotor member;
said accelerometers mounted upon said at least one of said platforms mounted upon said rotor member thereof at said predetermined angle.
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Accused Products
Abstract
A three axis inertial measurement unit is shown having a low inertia mechanical oscillator formed from two platforms counterbalanced against each other. Each platform is dithered at its natural frequency about a single torsional axis. A plurality of accelerators are mounted upon at least one of the counterbalanced platforms with each accelerometer having at least an input axis mounted at a predetermined angle to the torsional axis and to the platform. Each platform has a three legged, Y-shaped mounting member with a rotor member positioned between the legs of the mounting member. Web members which form the legs of the mounting member join the rotor member to the Y-shaped mounting member. Additionally, driving webs are mounted on each side of the web members for further joining the mounting member to the rotary member.
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Citations
5 Claims
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1. A three axis inertial measurement unit, comprising:
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two platforms counterbalanced against each other mounted as a mechanical oscillator for dithered rotation at a natural frequency of said platforms about a single torsional axis; a plurality of accelerometers mounted on at least one of said platforms; each accelerometer having at least an input axis; said plurality of accelerometers mounted upon said at least one platform such that said input axis of each accelerometer is at a predetermined angle to said single torsional axis and said platform; said platforms each having; a three legged, Y-shaped mounting member; a rotor member positioned between the legs of said mounting member; web members forming said legs of said Y-shaped mounting member to join said rotor member; and driving webs mounted on each side of said web members for further joining said mounting member to said rotor member; said accelerometers mounted upon said at least one of said platforms mounted upon said rotor member thereof at said predetermined angle. - View Dependent Claims (2, 3, 4, 5)
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Specification