Mr. Chinh D. Hoang Profile

Chinh D. Hoang

at Viettel High Technology Industry Corp

SPIE Involvement:

Author

Publications (2)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 9 October 2019 Paper

Improving the stabilization level of ISP system using feedforward compensators

Thuan Vu, Thang Nguyen, Chinh Hoang, Ban Nguyen

Proceedings Volume 11159, 111590Y (2019) https://doi.org/10.1117/12.2531899

Read Abstract +

The stabilization of the Line of Sight (LOS) of an Electro-Optical System (EOS) locating on a moving platform contributes significantly to the image quality. A portion of perturbation inherited by the base motion can be eliminated by numbers of algorithms with powerful processors boards. However, it is difficult to implement these algorithms in embedded systems because of memory capacity and processing speed limitation. This paper introduces a method for identifying gimbal parameters and feedforward compensators. The key parameters including the friction force, cross-coupling effect and misalignment compensator are investigated using feedforward compensator theory and verified by practical experiments. The effectiveness in the stabilization loop is validated through many scenarios of disturbance. The result shows that the good improvement for the stabilization level of inertial stabilization platform has been achieved, and the reduction of LOS RMS errors is up to 40 per cent.

Proceedings Article | 9 October 2019 Paper

Developing a control architecture for highly accurate multi-axis inertial stabilized platform

Thuan Vu, Hiep Nguyen, Chinh Hoang, Ban Nguyen

Proceedings Volume 11159, 111590I (2019) https://doi.org/10.1117/12.2531943

KEYWORDS: Control systems, Sensors, Cameras, Line of sight stabilization, Aerodynamics, Motion models, Structural design, Switching, Computer architecture, Device simulation

Read Abstract +

Inertial stabilized platforms (ISP) are used in many acquisition, tracking and pointing systems, in which the line of sight (LOS) of electro-optical sensors must be kept steady. This is very challenging, especially in long range Electro- Optical/Infrared (EO/IR) systems where the LOS is more sensitive to mechanical-electrical noise, aerodynamic force or base motion effects. The efforts to improve the stability of the system includes various approaches from control algorithms, feedback/feed forward compensator to dual-stage controller or six degrees of freedom pivot, etc. n this paper, the authors present several control architectures for a multi-axis ISP system. First, the dynamic of four-axis gimbaled pedestal is modeled taking into account the effects of friction, cross-coupling and mechanical limitation. Then, the control loops for stabilization and pointing are designed using master–slave architecture for each gimbal axis. The pointing accuracy and stabilization level are analyzed and evaluated by simulation and experiment. At the end, by switching the role of each gimbal, an optimal control architecture that performs the stabilization at micro radian level in the wide range of bandwidth has been suggested. It is also proved that the proposed methods are effective for other EO/IR mobile systems that suffered various frequency of disturbance.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years