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Method of making dynamically tuned gimbal suspension

  • US 4,665,605 A
  • Filed: 03/19/1986
  • Issued: 05/19/1987
  • Est. Priority Date: 04/14/1982
  • Status: Expired due to Fees
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Assignment
First Claim
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1. A method for making, by electroerosion, a dynamically tuned gimbal suspension for supporting a gyro rotor with two degrees of freedom, comprising the steps of:

  • (a) making a first, generally hollow-cylindrical ring having an axis, a first end and a second end and a peripheral surface and defining a radial direction, an axial direction and a peripheral direction,(b) making a second, generally hollow-cylindrical ring having an axis, a first end and a second end and a peripheral surface and defining a radial direction, an axial direction and a peripheral direction,(c) applying to said first ring a first pair of erosion cuts by electroerosion using erosion wire means, said erosion cuts starting at diametrically opposite points of said peripheral surface, said points being located in a first plane containing said axis of said first ring, the erosion wire means, for making each of the cuts of said first pair, being moved from said respective point of said peripheral surface in a radial direction and in an axial direction relative to said first ring to make a cut which is symmetric to said first plane and terminates in straight peripheral end portions, adjacent end portions of the cuts of said first pair being axially spaced and overlapping to define a pair of peripherally extending, diametrically opposite leaf springs therebetween,(d) applying to said first ring a second pair of erosion cuts by electroerosion using erosion wire means, said erosion cuts starting at diametrically opposite points of said peripheral surface, said points being located in a second plane containing said axis of said first ring and extending at a right angle to said first plane, the erosion wire means, for making each of the cuts of said second pair, being moved from said respective point of said peripheral surface in a radial direction and in an axial direction relative to said first ring to make a cut which is symmetric to said second plane and terminates in straight peripheral end portions, adjacent end portions of said cuts of said second pair being axially spaced and overlapping to define peripherally extending, diametrically opposite leaf springs therebetween, whereby said first ring is divided by said first and second pairs of cuts into a first ring portion adjacent said first end, a second ring portion adjacent said second end, and a median first gimbal portion therebetween,(e) applying to said second ring a third pair of erosion cuts by electroerosion using erosion wire means, said erosion cuts starting at diametrically opposite points of said peripheral surface, said points being located in a third plane containing said axis of said second ring, the erosion wire means, for making each of the cuts of said third pair, being moved from said respective point of said peripheral surface in a radial direction and in an axial direction relative to said second ring to make a cut which is symmetric to said third plane and terminates in straight axial end portions, adjacent end portions of the cuts of said first pair being peripherally spaced to define axially extending, diametrically opposite leaf springs therebetween,(f) applying to said second ring a fourth pair of erosion cuts by electroerosion using erosion wire means, said erosion cuts starting at diametrically opposite points being located in a fourth plane containing said axis of said second ring and extending at a right angle to said third plane, the erosion wire means, for making each of the cuts of said fourth pair, being moved from said respective point of said peripheral surface in a radial direction and in an axial direction relative to said second ring to make a cut which is symmetric to said fourth plane and terminates in straight axial end portions, adjacent end portions of the cuts of said fourth pair being peripherally spaced to define axially extending, diametrically opposite leaf springs therebetween, whereby said ring is divided by said third and fourth pairs of cuts into a third ring portion adjacent said first end, a fourth ring portion adjacent said second end and a median second gimbal portion therebetween,(g) placing said first and second rings coaxially one within the other such that said first and third planes coincide and said second and fourth planes coincide and each of said peripherally extending leaf springs is arranged crosswise to a respective one of said axially extending leaf springs,(h) interconnecting said first and third ring portions to form a first ring element for connection to said gyro rotor, and(i) interconnecting said second and fourth ring portions to form a second ring element for connection to drive means.

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