4 Attitude System
نویسنده
چکیده
Attitude determination is a requirement for most navigation and control problems. Classically, this problem has been solved by an Attitude Heading Reference System (AHRS) using gyroscopes that are updated by gravity sensors (pitch and roll) and magnetic field sensors (yaw) with low-pass filters to attenuate errors incurred during turns. Rate gyroscopes are prone to bias-and random-walk errors resulting from the integration of wide-band noise. Successful AHRS requires very expensive sensors that have exceptional bias stability. The sensor cost for this kind of attitude determination has limited such AHRS to very expensive applications. In cost-sensitive applications, filtering techniques are applied to bound the attitude error growth when using lessor sensors. With the recent
منابع مشابه
Study of the Attitude of Users towards Picture Archiving and Communication System Based on the Technology Acceptance Model in Teaching Hospitals of Qom, Iran
Background and Objectives: Many healthcare providers use health information technology to improve their performance. Picture Archiving and Communication System is a subsystem of the health information system that aims to facilitate the storing, archiving, and managing of digital images as well as their transmission. In this regard, measuring the level of acceptance of technology can be very hel...
متن کاملAttitude and Performance of Faculties Towards the Implementation of the Electronic Learning System (ELS) in Mashhad University of Medical Sciences (MUMS) in 2009
Introduction: In recent years ETS has become a common method of training in many universities around the country but we do not have similar experiences in Medical Universities. The aim of the current study is to investigate the attitude and performance of MUMS faculties towards the implementation of ETS. Method: This descriptive – cross sectional study was carried out in 2009. The study popula...
متن کاملTracking Control of Uncertain Non - Iinear MIMO System Using Modified Sliding Surfaces for Attitude Large Maneuver of Satellites on Orbit
Designing a robust tracking control for a non-linear MIMO system with uncertainty is one of the most complicated control problems. In this paper, sliding mode changed to non-linear controllable canonical form by input-output linearization. This, sliding surfaces can be defined in a way that we can de-couple equations and indicate the sliding conditions of multi-variable controller system. The u...
متن کاملAn efficient method to control the amplitude of the limit cycle in satellite attitude control system
In this paper, an efficient method is presented to control the attitude of a satellite with ON-OFF actuator. The main objective of this novel method is to control the amplitude of the limit cycle which commonly appears in the steady state of such systems; and at the same time by consideration of real actuator constraints, reduce the fuel consumption of system. The Proposed method is a combinati...
متن کاملRobust Adaptive Attitude Stabilization of a Fighter Aircraft in the Presence of Input Constraints
The problem of attitude stabilization of a fighter aircraft is investigated in this paper. The practical aspects of a real physical system like existence of external disturbance with unknown upper bound and actuator saturation are considered in the process of controller design of this aircraft. In order to design a robust autopilot in the presence of the actuator saturation, the Composite Nonli...
متن کامل