Line-of-sight stabilization of a gimbaled mechanism under passive base isolation

Date

2014-01-01

Author

Kandemir, Kutlu Demir
Akmese, Alper
Yazıcıoğlu, Yiğit

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

445
views

0
downloads

Line-of-sight stabilization is an important concept for aerospace applications utilizing gimbaled imaging systems. A widely used method for protecting the line-of-sight stabilization system from the disturbing effects of the base vibrations is to mount it on passive vibration isolators. However, these isolators may interact with gimbal controller and drastically limit the stabilization performance. This work deals with line-of-sight stabilization problem in aerospace structures by focusing on the parameters of controller and vibration isolation system. The problem is investigated on an experimental setup for a specific case. Several performance tests are applied on the setup and a relation between isolation parameters and controller bandwidth is obtained. The results are used to generate design constraints.

Subject Keywords

Line-of-sight stabilization, Gimbal, Vibration isolation, Controller structure interaction

URI

https://hdl.handle.net/11511/37731

Journal

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART G-JOURNAL OF AEROSPACE ENGINEERING

DOI

https://doi.org/10.1177/0954410012466994

Collections

Department of Mechanical Engineering, Article

Suggestions

OpenMETU
Core

Dynamic modelling and control of a gimballed airborne antenna platform with mass unbalance and friction Şeref, Tuğçe; Leblebicioğlu, Mehmet Kemal; Department of Electrical and Electronics Engineering (2018) Inertial stabilized gimballed systems are widely-used in many applications to achieve a high precision positioning. Airborne antennas pointing target as a part of the satellite communication may be examples of such systems. This thesis presents the dynamic modelling and control of a two axes gimballed airborne antenna platform. First, reference frames and the transformation matrices are defined to build up the motion of the antenna and kinematic equations of each gimbal are derived. Next, the dynamic equati...
Cogging Torque Disturbance Rejection for a Low-cost Gimbal Motor and a Controller Design with Practical Considerations Ozdogan, Gokhan; Leblebicioğlu, Mehmet Kemal (2019-01-01) In many robotic applications and inertially stabilized electro-optic gimbal systems, precise positioning and speed control are highly important concepts. Due to size and weight limitations, motor is required to be small but torque density is desired to be high. In high torque and cheap PMSM and BLDC motors, cogging torque and friction are usually the challenging disturbance sources. In this study, cogging torque and friction are identified using position sensors which already exist in gimbal systems, so the...
Fluid-structure interaction analysis in external flows using Linearized Euler solver Ardıç, Ata Tankut; Baran, Özgür Uğraş; Ciğeroğlu, Ender; Department of Mechanical Engineering (2022-8) Flutter is an aeroelastic instability that requires numerous fluid-structure interaction (FSI) analyses during the design process of an aircraft. Even with technology of today, numerical solution of FSI problems is a challenge as these of problems require a high amount of computational power. Most of the computational cost stems from the computational fluid dynamics analysis (CFD) part of the computation, and time-dependent nature of the problem. Harmonic methods, which are very cost-efficient compared to u...
Zenith Pass Problem In Air-To-Air Missiles With Nod-Over- Roll Gimbal Kandemir, Kutlu Demir; Yazıcıoğlu, Yiğit; Department of Mechanical Engineering (2023-1-24) Nod-over-Roll is a commonly used gimbal configuration in automatic target tracking and pointing systems due to its simplicity and volumetric advantage. Yet, it suffers from an inherent kinematic singularity problem right at the center of its task space, where roll axis and pointing vectors coincide. This phenomenon is called zenith pass problem and has to be solved in real time for a proper tracking performance. This thesis focuses on the zenith pass problem from an air-to-air missile seeker perspective. An...
POINTING PERFORMANCE CONTROL OF A SPACECRAFT CAMERA USING PIEZOELECTRIC ACTUATORS Kayastha, Sharmila; Tekinalp, Ozan; Ozgoren, Kemal (2010-02-18) A control system is designed to improve the pointing performance of a large Earth observation camera carried by a spacecraft. The spacecraft camera is mounted to the spacecraft thorough active truss members. The control system uses a cluster of reaction wheels together with piezoelectric struts. The improvement in the pointing performance using this dual actuator system is demonstrated through simulations.

Citation Formats

K. D. Kandemir, A. Akmese, and Y. Yazıcıoğlu, “Line-of-sight stabilization of a gimbaled mechanism under passive base isolation,” PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART G-JOURNAL OF AEROSPACE ENGINEERING, pp. 35–43, 2014, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/37731.