A new two-dimensional fast steering mirror based on piezoelectric actuators

2014 ◽  
Author(s):  
Chen Wei ◽  
Chen Sihai ◽  
Wu Xin ◽  
Luo Dong
Keyword(s):  
Piezoelectric Actuators ◽  
Two Dimensional

A compact two-dimensional laser scanner based on piezoelectric actuators

2015 ◽  
Vol 86 (1) ◽  
pp. 013102 ◽  
Author(s):  
Chen Wei ◽  
Chen Sihai ◽  
Luo Dong ◽  
Jiao Guohua
Keyword(s):  
Laser Scanner ◽  
Piezoelectric Actuators ◽  
Two Dimensional

Piezoelectric Actuators for Distributed Vibration Excitation of Thin Plates

1991 ◽  
Vol 113 (1) ◽  
pp. 100-107 ◽  
Author(s):  
E. K. Dimitriadis ◽  
C. R. Fuller ◽  
C. A. Rogers
Keyword(s):  
Piezoelectric Actuator ◽  
Piezoelectric Actuators ◽  
Thin Plates ◽  
Two Dimensional ◽  
Simply Supported ◽  
Piezoelectric Patch ◽  
Control Behavior ◽  
Vibration Excitation ◽  
Distributed Structures ◽  
Elastic Rectangular Plate

The behavior of two dimensional patches of piezoelectric material bonded to the surface of elastic distributed structures and used as vibration actuators is analytically investigated. A static analysis is used to estimate the loads induced by the piezoelectric actuator to the supporting elastic structure. The theory is then applied to develop an approximate dynamic model for the vibration response of a simply supported elastic rectangular plate excited by a piezoelectric patch of variable rectangular geometry. The results demonstrate that modes can be selectively excited and that the geometry of the actuator shape markedly affects the distribution of the response among modes. It thus appears possible to tailor the shape of the actuator to either excite or suppress particular modes leading to improved control behavior.

Spectrophotometric measurements of objective-prism spectra

1966 ◽  
Vol 24 ◽  
pp. 118-119
Author(s):  
Th. Schmidt-Kaler
Keyword(s):  
Progress Report ◽  
Two Dimensional ◽  
Objective Prism ◽  
Made In

I should like to give you a very condensed progress report on some spectrophotometric measurements of objective-prism spectra made in collaboration with H. Leicher at Bonn. The procedure used is almost completely automatic. The measurements are made with the help of a semi-automatic fully digitized registering microphotometer constructed by Hög-Hamburg. The reductions are carried out with the aid of a number of interconnected programmes written for the computer IBM 7090, beginning with the output of the photometer in the form of punched cards and ending with the printing-out of the final two-dimensional classifications.

Introductory paper

1966 ◽  
Vol 24 ◽  
pp. 3-5
Author(s):  
W. W. Morgan
Keyword(s):  
Line Intensity ◽  
Classification Scheme ◽  
Two Dimensional ◽  
Spectral Classification ◽  
Dimensional Array ◽  
Rr Lyrae ◽  
Metallic Line ◽  
Introductory Paper ◽  
Parameter Varying ◽  
Definition Of

1. The definition of “normal” stars in spectral classification changes with time; at the time of the publication of theYerkes Spectral Atlasthe term “normal” was applied to stars whose spectra could be fitted smoothly into a two-dimensional array. Thus, at that time, weak-lined spectra (RR Lyrae and HD 140283) would have been considered peculiar. At the present time we would tend to classify such spectra as “normal”—in a more complicated classification scheme which would have a parameter varying with metallic-line intensity within a specific spectral subdivision.

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