نتایج جستجو برای: attitude performance
تعداد نتایج: 1123354 فیلتر نتایج به سال:
Attitude control law design for spacecraft large angle maneuvers is investigated in this paper. The feedback linearization technique is applied to the design of a nonlinear tracking control law. The output function to be tracked is the quaternion attitude parameter. The designed control law turns out to be a combination of attitude and attitude rate tracking command. The attitude-only output fu...
Introduction: For many years, the prevalence of performance-enhancer substances using among athletes is still growing despite many prohibitions, and it seems that psychological factors play a role in it. Accordingly, the purpose of this study was to compare the performance enhancement attitude and muscularity in some athletes with and without the use of illegal substance in both forms of team a...
Attitude determination, along with attitude control, is critical to functioning of every space mission. Here, we investigate the application of a steady-state Kalman Filter for attitude determination using attitude sensors (sun sensor and horizon sensors) and rate integrating gyros. The three-axis steady-state Kalman Filter formulation, adopted from literature, offers obvious computational adva...
Background and Aim: Lack of knowledge about correct life style and prevalence of unhealthy behaviors play an important role in increasing cardiovascular diseases. The purpose of this study was to determine knowledge, attitude and performance of educational staff about cardiovascular diseases. Material and Method: This cross-sectional study was done in 2007 in selected educational districts ...
Background and aims: Agricultural activities for produce more products Compromising farmers health and environmental pollution. This study was carried out to assess the status and correlations between knowledge, attitude and practice of Greenhouse Farmers of Jiroft Township in relation to adverse health and environmental effects of the use of pesticides in 2015. Methods: This cross-sectional s...
the study aims to achieve research and testing of hypotheses survey techniques and questionnaires to collect information used. 61 questions in the questionnaire included 15 questions and 46 open questions according to research in the study population, girls and their mothers as the value of different children investment should be. mothers according to the research community benefits from havi...
A GPS multi-antenna system consisting of multiple off-the-shelf GPS sensors has been successfully developed and extensively tested in operational marine environments. The advantages to use such a system are the flexibility in the selection of GPS sensors, the cost-effectiveness of the system with the emerging low-cost high performance GPS products and the increased productivity of equipment whi...
Attitude estimation for small, low-cost unmanned aerial vehicles is often achieved using a relatively simple complementary filter that combines onboard accelerometers, gyroscopes, and magnetometer sensing. This paper explores the limits of performance of such attitude estimation, with a focus on performance in highly dynamic maneuvers. The complementary filter is derived along with the extended...
in this paper, static performance characteristics for a finite lenght two-lobe journal bearing lubricated with micropolar fluid is studied. using finite element method, steady-state film pressure is obtained by solving modified reynolds equation, based on micropolar lubrication theory. with the help of film pressure in bearing, the static performance characteristics in terms of load carrying ca...
In this paper we report on research related to the provision of automated feedback based on a computer adaptive test (CAT), used in formative assessment. A cohort of 76 second year university undergraduates took part in a formative assessment with a CAT and were provided with automated feedback on their performance. A sample of students responded in a short questionnaire to assess their attitud...
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