Vector fields for task-level distributed manipulation: experiments with organic micro actuator arrays

Author(s):  
K.-F. Bohringer ◽  
J.W. Suh ◽  
B.R. Donald ◽  
G.T.A. Kovacs
Author(s):  
Mark D. Bedillion

Actuator arrays are planar distributed manipulation systems that use multiple two degree-of-freedom actuators to manipulate objects with three degrees of freedom (x, y, and θ). Prior work has discussed actuator array dynamics while neglecting the inertia of the actuators; this paper extends prior work to the case of non-negligible actuator inertia. The dynamics are presented using a standard friction model incorporating stiction. Simulation results are presented that show object motion under previously derived control laws.


2005 ◽  
Vol 2005.4 (0) ◽  
pp. 269-270
Author(s):  
Masahiro OHKA ◽  
Takehiro FUJIWARA ◽  
Shiho MATSUKAWA ◽  
Keitaro KATO ◽  
Yasunaga MITSUYA

1999 ◽  
Author(s):  
Hiroshi Hosaka ◽  
Kiyoshi Itao

Abstract The coupled vibration of microcantilevers, which is induced by airflow, is analyzed in the present study in order to develop high-speed information and sensing devices that use micro-actuator arrays. Simple formulas that give the vibrational coupling amplitude and damping ratio are derived by replacing the cantilevers with a string of spheres, solving Stokes equation, then combining it with an ordinary beam equation. Using these formulas, the coupling amplitude is seen to increase as the beam size, beam gap, internal friction, and the difference in the resonant frequencies of the beams all decrease; the damping ratio is seen to increase as the beam becomes smaller. The validity of the theory advanced here is verified with actual size and enlarged model experiments.


Author(s):  
Mark D. Bedillion ◽  
Deepak Parajuli ◽  
Randy C. Hoover

Actuator arrays are planar distributed manipulation systems that use multiple two degree-of-freedom actuators to manipulate objects with three degrees of freedom (x, y, and θ). This paper describes methods of sensing the position and orientation of objects on an actuator array using only binary object sensors at each actuator. The object sensor information, when combined, forms a binary image of the object which may be processed to recover object pose. The methods’ effectiveness for rectangular objects is verified via simulation.


2001 ◽  
Vol 7 (3) ◽  
pp. 117-119 ◽  
Author(s):  
B. J. Pokines ◽  
J. Tani ◽  
M. Esashi ◽  
T. Hamano ◽  
K. Mizuno ◽  
...  

2001 ◽  
Vol 20 (7) ◽  
pp. 553-583 ◽  
Author(s):  
Jonathan E. Luntz ◽  
William Messner ◽  
Howie Choset

2020 ◽  
Vol 29 (4) ◽  
pp. 2170-2188
Author(s):  
Lindsey R. Squires ◽  
Sara J. Ohlfest ◽  
Kristen E. Santoro ◽  
Jennifer L. Roberts

Purpose The purpose of this systematic review was to determine evidence of a cognate effect for young multilingual children (ages 3;0–8;11 [years;months], preschool to second grade) in terms of task-level and child-level factors that may influence cognate performance. Cognates are pairs of vocabulary words that share meaning with similar phonology and/or orthography in more than one language, such as rose – rosa (English–Spanish) or carrot – carotte (English–French). Despite the cognate advantage noted with older bilingual children and bilingual adults, there has been no systematic examination of the cognate research in young multilingual children. Method We conducted searches of multiple electronic databases and hand-searched article bibliographies for studies that examined young multilingual children's performance with cognates based on study inclusion criteria aligned to the research questions. Results The review yielded 16 articles. The majority of the studies (12/16, 75%) demonstrated a positive cognate effect for young multilingual children (measured in higher accuracy, faster reaction times, and doublet translation equivalents on cognates as compared to noncognates). However, not all bilingual children demonstrated a cognate effect. Both task-level factors (cognate definition, type of cognate task, word characteristics) and child-level factors (level of bilingualism, age) appear to influence young bilingual children's performance on cognates. Conclusions Contrary to early 1990s research, current researchers suggest that even young multilingual children may demonstrate sensitivity to cognate vocabulary words. Given the limits in study quality, more high-quality research is needed, particularly to address test validity in cognate assessments, to develop appropriate cognate definitions for children, and to refine word-level features. Only one study included a brief instruction prior to assessment, warranting cognate treatment studies as an area of future need. Supplemental Material https://doi.org/10.23641/asha.12753179


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