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The staircase drive—A novel actuator design optimised for daisy-chaining and minimum stress load coupling

The staircase drive—A novel actuator design optimised for daisy-chaining and minimum stress load coupling
The staircase drive—A novel actuator design optimised for daisy-chaining and minimum stress load coupling

This work presents a novel type of actuator that improves over the standard cantilever by permitting daisy-chaining while minimising stress to the joint connecting to the load. A detailed structural and functional comparison of the proposed device against the cantilever actuator as a baseline is given, led by a brief revision of the cantilever actuator as the state-of-the-art that highlights its limitations with respect to daisy-chaining and the stress it inherently creates within the joint connecting to the load when attempting out-of-plane displacement without rotation. Simulations of both devices’ performance confirm that the newly proposed device yields the targeted displacement profile that both enables the daisy-chaining of such a device into a higher-order actuator for increased displacement and reduce stress in the joint with the load. This comes at the cost of reduced maximum displacement compared to the cantilever, which can be overcome by daisy-chaining. The proposed device’s performance is further evaluated on the basis of manufactured prototypes measured by means of a laser scanning vibrometer. The prototype was manufactured on a 150 µm alumina substrate, and both electrodes and piezoelectric layer were deposited in a thick-film printing process.

Actuator, MEMS, Piezoelectric
1424-8220
Hoffmann, Falk-Martin
b5b5b465-9ff4-4eb5-845e-c36c6d1c9b97
Holland, Keith R.
90dd842b-e3c8-45bb-865e-3e7da77ec703
Harris, Nicholas
237cfdbd-86e4-4025-869c-c85136f14dfd
White, Neil M.
c7be4c26-e419-4e5c-9420-09fc02e2ac9c
Fazi, Filippo Maria
4cf415dc-c209-49d7-b383-0660d90691b1
Hoffmann, Falk-Martin
b5b5b465-9ff4-4eb5-845e-c36c6d1c9b97
Holland, Keith R.
90dd842b-e3c8-45bb-865e-3e7da77ec703
Harris, Nicholas
237cfdbd-86e4-4025-869c-c85136f14dfd
White, Neil M.
c7be4c26-e419-4e5c-9420-09fc02e2ac9c
Fazi, Filippo Maria
4cf415dc-c209-49d7-b383-0660d90691b1

Hoffmann, Falk-Martin, Holland, Keith R., Harris, Nicholas, White, Neil M. and Fazi, Filippo Maria (2021) The staircase drive—A novel actuator design optimised for daisy-chaining and minimum stress load coupling. Sensors, 21 (22), [7740]. (doi:10.3390/s21227740).

Record type: Article

Abstract

This work presents a novel type of actuator that improves over the standard cantilever by permitting daisy-chaining while minimising stress to the joint connecting to the load. A detailed structural and functional comparison of the proposed device against the cantilever actuator as a baseline is given, led by a brief revision of the cantilever actuator as the state-of-the-art that highlights its limitations with respect to daisy-chaining and the stress it inherently creates within the joint connecting to the load when attempting out-of-plane displacement without rotation. Simulations of both devices’ performance confirm that the newly proposed device yields the targeted displacement profile that both enables the daisy-chaining of such a device into a higher-order actuator for increased displacement and reduce stress in the joint with the load. This comes at the cost of reduced maximum displacement compared to the cantilever, which can be overcome by daisy-chaining. The proposed device’s performance is further evaluated on the basis of manufactured prototypes measured by means of a laser scanning vibrometer. The prototype was manufactured on a 150 µm alumina substrate, and both electrodes and piezoelectric layer were deposited in a thick-film printing process.

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More information

Accepted/In Press date: 16 November 2021
Published date: 20 November 2021
Keywords: Actuator, MEMS, Piezoelectric

Identifiers

Local EPrints ID: 453843
URI: http://eprints.soton.ac.uk/id/eprint/453843
ISSN: 1424-8220
PURE UUID: a8a7cd1e-c41f-421c-a2d1-97fbbcdf0348
ORCID for Falk-Martin Hoffmann: ORCID iD orcid.org/0000-0003-2925-2124
ORCID for Keith R. Holland: ORCID iD orcid.org/0000-0001-7439-2375
ORCID for Nicholas Harris: ORCID iD orcid.org/0000-0003-4122-2219
ORCID for Neil M. White: ORCID iD orcid.org/0000-0003-1532-6452

Catalogue record

Date deposited: 25 Jan 2022 17:38
Last modified: 28 Apr 2022 01:37

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Contributors

Author: Falk-Martin Hoffmann ORCID iD
Author: Keith R. Holland ORCID iD
Author: Nicholas Harris ORCID iD
Author: Neil M. White ORCID iD
Author: Filippo Maria Fazi

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