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pro vyhledávání: '"Vasco António Lourenço Lima"'
A vacuum encapsulated MEMS accelerometer using Sigma-Delta modulation is here presented. Three different modulation orders (second, third, and fourth) were implemented in a field-programable gate array (FPGA), enabling flexibility for tuning the loop
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a1dc73bf4ad34a84b37a868342104703
https://hdl.handle.net/1822/71130
https://hdl.handle.net/1822/71130
Autor:
F. S. Alves, Jorge Cabral, Vasco António Lourenço Lima, Luís A. Rocha, Joao Gaspar, Eurico Esteves Moreira
Publikováno v:
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Bi-directional full-gap tracking on parallel-plate electrostatic actuators using closed-loop control is demonstrated in this paper. On-Off control is explored, where the actuator position is controlled by actuating or releasing the actuator based on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7510537eef0fe9270c2a99e7029b5252
https://doi.org/10.1016/j.sna.2016.04.002
https://doi.org/10.1016/j.sna.2016.04.002
Publikováno v:
Proceedings, Vol 2, Iss 13, p 1029 (2018)
Encapsulation of MEMS accelerometers in vacuum is advantageous, since it allows integration with other sensors, leading to size and cost reduction. One technique to operate MEMS accelerometers in vacuum is the use of closed-loop Sigma-Delta modulatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::77954b216f26e4e4f803b8f27d2b0e6a
https://www.mdpi.com/2504-3900/2/13/1029
https://www.mdpi.com/2504-3900/2/13/1029
Autor:
Joao Gaspar, Vasco António Lourenço Lima, Nuno Brito, F. S. Alves, Jorge Cabral, Luís A. Rocha
Publikováno v:
Procedia Engineering. 168:814-817
A comparison between different architectures of electromechanical sigma-delta modulators applied to MEMS accelerometers is presented here. Several modulation orders (2nd to 5th) and respective gains can be selected, and controlled in real-time, and s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dbefd546a303da750024f3440e8cd254
Autor:
Nuno Brito, Luís A. Rocha, F. S. Alves, Jorge Cabral, Joao Gaspar, João L. Monteiro, Vasco António Lourenço Lima
Publikováno v:
Procedia Engineering. 168:954-957
"Procedia Engineering, vol. 168 (2016)"
The transition from an open loop to a closed loop sensing approach in MEMS accelerometers is an important step towards improving the sensor noise performance, bandwidth and time responses [1]. However, thi
The transition from an open loop to a closed loop sensing approach in MEMS accelerometers is an important step towards improving the sensor noise performance, bandwidth and time responses [1]. However, thi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7a2f53c4d06b08ed1cc0f9564a859086
Autor:
Joao Gaspar, João L. Monteiro, Luís A. Rocha, Nuno Brito, Jorge Cabral, Vasco António Lourenço Lima
Publikováno v:
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
A digital platform for fast assessment and testing of multiple order architectures of electromechanical Sigma-Delta modulators for MEMS capacitive accelerometers is introduced in this paper. It is well known that the introduction of a negative feedba
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4f0a7f3e4b3e1dcea08039b100450718