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US 10,585,398 B2Granted
General two degree of freedom isotropic harmonic oscillator and associated time base
AssigneeEcole Polytechnique Federale De Lausanne (Epfl)
InventorsSimon Henein, Lennart Rubbert, Ilan Vardi
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Abstract
A mechanical isotropic harmonic oscillator including a two rotational degrees of freedom linkage supporting an orbiting mass with respect to a fixed base with at least one spring element having isotropic and linear restoring force properties, such that a high degree of spring stiffness and reduced mass isotropy provides for reduced sensitivity to linear and angular accelerations.
Claims21
A mechanical isotropic harmonic oscillator comprising:
- a two rotational degrees of freedom linkage supporting an orbiting mass with respect to a fixed base with two spring elements having isotropic and linear restoring force properties while keeping a rotational degree of freedom of the orbiting mass with respect to the fixed base substantially blocked,
- wherein the two spring elements are symmetrically arranged relative to the orbiting mass to reduce an isochronism defect of the orbiting mass,
- wherein the orbiting mass includes a first mass and a second mass symmetrically arranged around a central joint, and
- wherein an end of one of the two spring elements is attached to the first mass, and an end of the other one of the two spring elements is attached to the second mass.
1 more element
A mechanical isotropic harmonic oscillator comprising:
- a two rotational degrees of freedom linkage supporting an orbiting mass with respect to a fixed base with a spring element having isotropic and linear restoring force properties while keeping a rotational degree of freedom of the orbiting mass with respect to the fixed base substantially blocked,
- wherein the orbiting mass includes a first mass and a second mass connected to each other with a rigid bar, the first and second mass are arranged such that a center of gravity of the orbiting mass lies at a connection location of the orbiting mass with the two rotational degrees of freedom linkage,
- wherein the spring element of the two rotational degrees of freedom linkage includes at least three flexible rods.
Dependencies are inferred from the claim text.