A Coupling Method for the Stability of Reflectors and Support Structure in an ALB Optical-Mechanical System
This research presents a “flexible support structure between reflective mirrors” through a coupling analysis method to restrain the surface shaping error of reflectors in the optical system of airborne LiDAR bathymetry (ALB) under various working conditions. The flexible structure proposed adjusts t...
Saved in:
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-12-01
|
| Series: | Remote Sensing |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2072-4292/17/1/60 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1841549003915788288 |
|---|---|
| author | Guoqing Zhou Jianyin Liu Ke Gao Rundong Liu Yi Tang Angte Cai Xiang Zhou Jiasheng Xu Xiaolan Xie |
| author_facet | Guoqing Zhou Jianyin Liu Ke Gao Rundong Liu Yi Tang Angte Cai Xiang Zhou Jiasheng Xu Xiaolan Xie |
| author_sort | Guoqing Zhou |
| collection | DOAJ |
| description | This research presents a “flexible support structure between reflective mirrors” through a coupling analysis method to restrain the surface shaping error of reflectors in the optical system of airborne LiDAR bathymetry (ALB) under various working conditions. The flexible structure proposed adjusts the mechanical relationship between the reflectors and the support structure to reduce reflector mirror deformation. The optical system is first modeled using Zemax and exported to SolidWorks to create a 3D model of the optical receiving system. Ansys is then used to conduct stiffness testing and surface analysis on the support structure of the annular thin cylinder. According to the analysis results, the first-order frequency of the support structure using a ring-shaped thin cylinder is as high as 353.64 Hz, which indicates that it has good dynamic characteristics. The PV value of the reflector mirror deformation under the thermal coupling reaches 32.59 nm, and the RMS value reaches 8.62 nm. Additionally, it is discovered that the maximum acceleration response of the reflector mirror under the applied 1 g acceleration excitation reaches 4.22 g when carrying out the dynamics analysis of the support structure. Under random vibration analysis, the maximum acceleration RMS value of the reflector mirror assembly reaches 2.18 g, and the maximum stress of the flexible device of the support structure reaches 2.65 MPa. Especially, five groups of experimental results demonstrated that the proposed coupling analysis method can receive the echo signals, the reflector mirror support structure designed in this paper, and the flexible structure is stable and reliable. |
| format | Article |
| id | doaj-art-8b4712c9ea0a432ba1f92ece7e25ec53 |
| institution | Kabale University |
| issn | 2072-4292 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj-art-8b4712c9ea0a432ba1f92ece7e25ec532025-01-10T13:20:05ZengMDPI AGRemote Sensing2072-42922024-12-011716010.3390/rs17010060A Coupling Method for the Stability of Reflectors and Support Structure in an ALB Optical-Mechanical SystemGuoqing Zhou0Jianyin Liu1Ke Gao2Rundong Liu3Yi Tang4Angte Cai5Xiang Zhou6Jiasheng Xu7Xiaolan Xie8Guangxi Key Laboratory of Spatial Information and Geomatics, College of Geomatics and Geoinformation, Guilin University of Technology, Guilin 541006, ChinaCollege of Computer Science and Engineering, Guilin University of Technology, Guilin 541006, ChinaGuangxi Key Laboratory of Spatial Information and Geomatics, College of Geomatics and Geoinformation, Guilin University of Technology, Guilin 541006, ChinaGuangxi Zhuang Autonomous Region Institute of Natural Resources Remote Sensing, Nanning 530023, ChinaGuangxi Key Laboratory of Spatial Information and Geomatics, College of Geomatics and Geoinformation, Guilin University of Technology, Guilin 541006, ChinaCollege of Mechanical and Control Engineering, Guilin University of Technology, Guilin 541006, ChinaCollege of Mechanical and Control Engineering, Guilin University of Technology, Guilin 541006, ChinaGuangxi Key Laboratory of Spatial Information and Geomatics, College of Geomatics and Geoinformation, Guilin University of Technology, Guilin 541006, ChinaCollege of Computer Science and Engineering, Guilin University of Technology, Guilin 541006, ChinaThis research presents a “flexible support structure between reflective mirrors” through a coupling analysis method to restrain the surface shaping error of reflectors in the optical system of airborne LiDAR bathymetry (ALB) under various working conditions. The flexible structure proposed adjusts the mechanical relationship between the reflectors and the support structure to reduce reflector mirror deformation. The optical system is first modeled using Zemax and exported to SolidWorks to create a 3D model of the optical receiving system. Ansys is then used to conduct stiffness testing and surface analysis on the support structure of the annular thin cylinder. According to the analysis results, the first-order frequency of the support structure using a ring-shaped thin cylinder is as high as 353.64 Hz, which indicates that it has good dynamic characteristics. The PV value of the reflector mirror deformation under the thermal coupling reaches 32.59 nm, and the RMS value reaches 8.62 nm. Additionally, it is discovered that the maximum acceleration response of the reflector mirror under the applied 1 g acceleration excitation reaches 4.22 g when carrying out the dynamics analysis of the support structure. Under random vibration analysis, the maximum acceleration RMS value of the reflector mirror assembly reaches 2.18 g, and the maximum stress of the flexible device of the support structure reaches 2.65 MPa. Especially, five groups of experimental results demonstrated that the proposed coupling analysis method can receive the echo signals, the reflector mirror support structure designed in this paper, and the flexible structure is stable and reliable.https://www.mdpi.com/2072-4292/17/1/60instrumentationmeasurementmetrologyLiDARoptical-machine systemsupport structure |
| spellingShingle | Guoqing Zhou Jianyin Liu Ke Gao Rundong Liu Yi Tang Angte Cai Xiang Zhou Jiasheng Xu Xiaolan Xie A Coupling Method for the Stability of Reflectors and Support Structure in an ALB Optical-Mechanical System Remote Sensing instrumentation measurement metrology LiDAR optical-machine system support structure |
| title | A Coupling Method for the Stability of Reflectors and Support Structure in an ALB Optical-Mechanical System |
| title_full | A Coupling Method for the Stability of Reflectors and Support Structure in an ALB Optical-Mechanical System |
| title_fullStr | A Coupling Method for the Stability of Reflectors and Support Structure in an ALB Optical-Mechanical System |
| title_full_unstemmed | A Coupling Method for the Stability of Reflectors and Support Structure in an ALB Optical-Mechanical System |
| title_short | A Coupling Method for the Stability of Reflectors and Support Structure in an ALB Optical-Mechanical System |
| title_sort | coupling method for the stability of reflectors and support structure in an alb optical mechanical system |
| topic | instrumentation measurement metrology LiDAR optical-machine system support structure |
| url | https://www.mdpi.com/2072-4292/17/1/60 |
| work_keys_str_mv | AT guoqingzhou acouplingmethodforthestabilityofreflectorsandsupportstructureinanalbopticalmechanicalsystem AT jianyinliu acouplingmethodforthestabilityofreflectorsandsupportstructureinanalbopticalmechanicalsystem AT kegao acouplingmethodforthestabilityofreflectorsandsupportstructureinanalbopticalmechanicalsystem AT rundongliu acouplingmethodforthestabilityofreflectorsandsupportstructureinanalbopticalmechanicalsystem AT yitang acouplingmethodforthestabilityofreflectorsandsupportstructureinanalbopticalmechanicalsystem AT angtecai acouplingmethodforthestabilityofreflectorsandsupportstructureinanalbopticalmechanicalsystem AT xiangzhou acouplingmethodforthestabilityofreflectorsandsupportstructureinanalbopticalmechanicalsystem AT jiashengxu acouplingmethodforthestabilityofreflectorsandsupportstructureinanalbopticalmechanicalsystem AT xiaolanxie acouplingmethodforthestabilityofreflectorsandsupportstructureinanalbopticalmechanicalsystem AT guoqingzhou couplingmethodforthestabilityofreflectorsandsupportstructureinanalbopticalmechanicalsystem AT jianyinliu couplingmethodforthestabilityofreflectorsandsupportstructureinanalbopticalmechanicalsystem AT kegao couplingmethodforthestabilityofreflectorsandsupportstructureinanalbopticalmechanicalsystem AT rundongliu couplingmethodforthestabilityofreflectorsandsupportstructureinanalbopticalmechanicalsystem AT yitang couplingmethodforthestabilityofreflectorsandsupportstructureinanalbopticalmechanicalsystem AT angtecai couplingmethodforthestabilityofreflectorsandsupportstructureinanalbopticalmechanicalsystem AT xiangzhou couplingmethodforthestabilityofreflectorsandsupportstructureinanalbopticalmechanicalsystem AT jiashengxu couplingmethodforthestabilityofreflectorsandsupportstructureinanalbopticalmechanicalsystem AT xiaolanxie couplingmethodforthestabilityofreflectorsandsupportstructureinanalbopticalmechanicalsystem |