IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0376907
(2003-02-27)
|
발명자
/ 주소 |
- Arbogast, Darin J.
- Calkins, Frederick T.
- Clingman, Dan J.
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
8 인용 특허 :
3 |
초록
▼
The present invention presents a system for a compound actuator. The system includes first and second electrode layers each including two electrode sections, an intermediate electrode layer between the first and second electrode layers, and first and second electrostrictive materials that change len
The present invention presents a system for a compound actuator. The system includes first and second electrode layers each including two electrode sections, an intermediate electrode layer between the first and second electrode layers, and first and second electrostrictive materials that change length in an applied electrical field. The first electrostrictive material is positioned between the first and intermediate electrode layers. The second electrostrictive material is positioned between the intermediate and second electrode layers. The first electrostrictive material has a first length adjoining the first electrode section and a second length adjoining the second electrode section. The second electrostrictive material has a third length adjoining the fourth electrode section and a fourth length adjoining the fifth electrode section. The first and second electrostrictive materials are attached such that differential changes in the first and third lengths, and the second and fourth lengths, respectively, results in a compound lateral motion.
대표청구항
▼
1. A system for a recurve actuator, the system comprising:a first electrode layer including a first electrode section, a second electrode section, and a third electrode section, the second electrode section being intermediate the first and third electrode sections; a second electrode layer including
1. A system for a recurve actuator, the system comprising:a first electrode layer including a first electrode section, a second electrode section, and a third electrode section, the second electrode section being intermediate the first and third electrode sections; a second electrode layer including a fourth electrode section, the fourth electrode section being arranged to overlap the first, second, and third electrode sections; a first electrostrictive material configured to change length in response to an applied electrical field, the first electrostrictive material being positioned between the first electrode layer and the second electrode layer, the first electrostrictive material having a first length adjoining the first electrode section, a second length adjoining the second electrode section, and a third length adjoining the third electrode section; a third electrode layer including a fifth electrode section, a sixth electrode section, and a seventh electrode section, the sixth electrode section being intermediate the fifth and seventh electrode sections, the fifth, sixth, and seventh electrode sections being arranged to overlap the first, second, and third electrode sections, respectively; and a second electrostrictive material configured to change length in response to an applied electrical field, the second electrostrictive material being positioned between the second electrode layer and the third electrode layer, the second electrostrictive material having a fourth length adjoining the fifth electrode section, a fifth length adjoining the sixth electrode section, and a sixth length adjoining the seventh electrode section, the second electrostrictive material and the first electrostrictive material being attached to each other such that at least one differential change in the first length and the fourth length, the second length and the fifth length, and the third length and the sixth length, results in a lateral motion of the first electrostrictive material and the second electrostrictive material. 2. The system of claim 1, wherein the first electrostrictive material and the second electrostrictive material each include at least one sheet of electrostrictive material.3. The system of claim 1, wherein the first electrode layer, the second electrode layer, and the third electrode layer each include at least one sheet of conductive material.4. The system of claim 1, further comprising:a first voltage source arranged to provide a voltage differential between the first electrode section and the fourth electrode section, the second electrode section and the fifth electrode section, and the third electrode section and the sixth electrode section, the voltage differential causing the first electrostrictive material and the second electrostrictive material to change from the first length, the second length, the third length, the fourth length, the fifth length, and the sixth length to a seventh length, an eighth length, a ninth length, a tenth length, an eleventh length, and a twelve length, respectively, that are shorter than the first length, the second length, the third length, the fourth length, the fifth length, and the sixth length, respectively. 5. The system of claim 4, further comprising:a second voltage source arranged to provide a variable voltage to the second electrode layer, the variable voltage causing the first electrostrictive material to change from the seventh length towards a thirteenth length that is shorter than the seventh length, the eighth length towards a fourteenth length that is longer than the eighth length, and the ninth length towards a fifteenth length that is shorter than the ninth length when the second electrostrictive material changes from the tenth length towards a sixteenth length that is longer than the tenth length, the eleventh length towards a seventeenth length that is shorter than the eleventh length, and the twelfth length towards an eighteenth length that is longer than the twelfth length, the variable voltage further causing the first electrostrictive material to change from the seventh length towards a nineteenth length that is longer than the seventh length, the eighth length towards a twentieth length that is shorter than the eighth length, and the ninth length towards a twenty-first length that is longer than the ninth length when the second electrostrictive material changes from the tenth length towards a twenty-second length that is shorter than the tenth length, the eleventh length towards a twenty-third length that is longer than the eleventh length, and the twelfth length towards a twenty-fourth length that is shorter than the twelfth length. 6. The system of claim 5, wherein the second voltage source includes a biased AC voltage source, such that the lateral motion is periodic.7. The system of claim 6, wherein the lateral motion is resonant.8. The system of claim 1, wherein the first electrode section includes a first connection tab, the second electrode section includes a first connection point, the third electrode section includes a second connection tab, the fourth electrode section includes a third connection tab, the fifth electrode section includes a fourth connection tab, the sixth electrode section includes a second connection point, and the seventh electrode section includes a fifth electrode tab, the first, third, and fourth connection tabs being arranged to not overlap each other, the first and second connection points being arranged to not overlap each other, and the second, third, and fifth connection tabs being arranged to not overlap each other.9. The system of claim 1, wherein the second electrode layer further includes an eighth electrode section, the first electrode section includes a first connection tab, the second electrode section includes a first connection point, the third electrode section includes a second connection tab, the fourth electrode section includes a third connection tab, the fifth electrode section includes a fourth connection tab, the sixth electrode section includes a second connection point, the seventh electrode section includes a fifth electrode tab, and the eighth electrode section includes a sixth electrode tab, the first, third, and fourth connection tabs being arranged to not overlap each other, the first and second connection points and the fourth and eighth electrode sections being arranged to not overlap each other, and the second, sixth, and fifth connection tabs being arranged to not overlap each other.10. The system of claim 9, wherein the third connection tab is located intermediate the first connection tab and the fourth connection tab, and the sixth connection tab is located intermediate the second connection tab and the fifth connection tab.11. The system of claim 1, wherein the first electrostrictive material and the second electrostrictive material include one of grafted elastomers, ionic polymers, ceramics, relaxor ferroelectric-ferroelectric solid state solutions, lead zinc niobate-lead titanate, and electron irradiated copolymer polyvinylidene fluoride-trifluoroethyline.12. The system of claim 1, wherein the relaxor ferroelectric-ferroelectric solid-state solutions include one of lead magnesium, PZN-PT electrostrictive crystals, PMN-PT electrostrictive crystals, and complex perovskite crystal analogs.13. The system of claim 1, wherein the first electrostrictive material and the second electrostrictive material are attached to each other with an attachment including adhesive.14. The system of claim 13, wherein the adhesive includes at least one sheet of adhesive film.15. The system of claim 1, wherein the first electrode section has a first electrode length, the second electrode section has a second electrode length, the third electrode section has a third electrode length, the fourth electrode section has a fourth electrode length, the fifth electrode section has a fifth electrode length, the sixth electrode section has a sixth electrode length, and the seventh electrode section has a seventh electrode length, the third, fifth and seventh electrode lengths are equalized toward the first electrode length, the fourth electrode length is around four times the first electrode length, and the second and sixth electrode lengths are around two times the first electrode length.16. The system of claim 15 wherein of the lateral motion includes a recurve.
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