Current Control Amplifier for Piezoelectric Actuator in Precision Positioning Control

2007 ◽  
Author(s):  
Changhai Ru
Keyword(s):  
Control Algorithm ◽  
Hybrid Control ◽  
Low Frequency ◽  
Current Control ◽  
Piezoelectric Transducers ◽  
Practical Application ◽  
Precise Positioning ◽  
Positioning Control ◽  
The Poor ◽  
A Current

Piezoelectric transducers are known to exhibit less hysterisis when driven with current or charge rather than voltage. Despite this advantage, such methods have found little practical application due to the poor low frequency response of present current and charge driver designs. In this paper, a current control piezoelectric amplifier is presented which can reduce hysteresis. Special circuits and a hybrid control algorithm realize the quick and precise positioning. Experimental results demonstrate that the amplifier can be used for dynamic and static applications. Low frequency bandwidths can be achieved.

Optimized Implementation of a Current Control Algorithm for Multiphase Interleaved Power Converters

2014 ◽  
Vol 10 (4) ◽  
pp. 2224-2232 ◽  
Author(s):  
Pablo D. Antoszczuk ◽  
Rogelio Garcia Retegui ◽  
Marcos Funes ◽  
Daniel Carrica
Keyword(s):  
Control Algorithm ◽  
Power Converters ◽  
Current Control ◽  
A Current

scholarly journals A Hybrid Control Algorithm for Gradient-Free Optimization using Conjugate Directions

2020 ◽  
Vol 53 (2) ◽  
pp. 5825-5830
Author(s):  
Alessandro Melis ◽  
Ricardo G. Sanfelice ◽  
Lorenzo Marconi
Keyword(s):  
Control Algorithm ◽  
Hybrid Control ◽  
Conjugate Directions

Production of the English past tense by children with language comprehension impairments

2005 ◽  
Vol 32 (1) ◽  
pp. 117-137 ◽  
Author(s):  
KATE NATION ◽  
MARGARET J. SNOWLING ◽  
PAULA CLARKE
Keyword(s):  
Language Comprehension ◽  
High Frequency ◽  
Matched Control ◽  
Low Frequency ◽  
Past Tense ◽  
Phonological Skills ◽  
The Poor ◽  
Poor Comprehenders ◽  
Irregular Form ◽  
Irregular Verbs

Three experiments investigated the ability of eight-year old children with poor language comprehension to produce past tense forms of verbs. Twenty children selected as poor comprehenders were compared to 20 age-matched control children. Although the poor comprehenders performed less well than controls on a range of tasks considered to tap verbal-semantic abilities, the two groups showed equivalent phonological skills. Poor comprehenders performed as well as control children when asked to inflect novel verbs and regular verbs. In contrast, poor comprehenders were less skilled than controls at inflecting both high frequency and low frequency irregular verbs. Although the predominant error pattern for all children was to over-regularize, this was most marked in the poor comprehenders; control children were more likely to produce errors that contained knowledge of the irregular form than poor comprehenders. In addition, the ability to inflect irregular verbs was related to individual differences in verbal-semantic skills. These findings are discussed within a framework in which verb inflection is related to underlying language skills in both the phonological and semantic domains.

NO/ROS/RNS Cascaded-Releasing Nano-Platform for Gas/PDT/PTT/Immunotherapy of Tumor

2021 ◽  
Author(s):  
Mengchao Ding ◽  
Kai Shao ◽  
Lijuan Wu ◽  
Yuping Jiang ◽  
Bing Cheng ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Tumor Therapy ◽  
Practical Application ◽  
Gas Treatment ◽  
The Poor ◽  
Promising Strategy ◽  
Poor Efficacy

Nitric oxide (NO) gas treatment offers a promising strategy for tumor therapy, however, its practical application was still be limited for the poor efficacy and biotoxicity which were caused by...

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