Related Experiment Video
Updated: Jan 30, 2026

High-pressure, High-temperature Deformation Experiment Using the New Generation Griggs-type Apparatus
Published on: April 3, 2018
Theoretical and experimental research on temperature-induced surface distortion of deformable mirror
Abstract:
In a well-manufactured deformable mirror (DM), the temperature-induced distortion (TID) has been reported exist on the surface shape of the DM, when the working environment temperature is not equal to that of the manufacturing environment. The DM could not effectively correct this actuator-corresponding TID and the correction ability of the DM would be limited. In this paper, the the TID's essential mechanism is analyzed systematically based on the thermal stress characteristics. An efficient method based on an auxiliary temperature compensation module (TCM) and a hybrid closed-loop control algorithm are presented accordingly. A finite element model is built to evaluate the TID characteristics and the compensation capability of the TCM. In the simulation, by using the TCM, the the DM's improved surface shape does not contain the dynamic high-frequency distortion caused by the actuators tilt. In the experiment, which uses a designed TCM and a hybrid closed-loop control algorithm, a DM's TID is effectively depressed and a well-compensated DM surface shape is finally achieved.
Related Concept Videos
Temperature Dependent Deformation
Plastic Deformations
Plastic Deformations
Theoretical Foundations of Nursing Practice
Theories provide a perspective to assess patients' conditions and organize data and methods. They also assist in analyzing and interpreting information. They represent a...
Theoretical Approaches to Psychological Disorder
Biological approach
The biological approach posits that internal, organic factors are the primary causes of such disorders. This perspective emphasizes brain structure and function, genetic predispositions, and neurotransmitter imbalances. For example, schizophrenia has been associated with both genetic...
Deformations in a Symmetric Member in Bending
When the member is segmented into tiny cubic elements, it is observed that the primary stress...

