توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Plasma Actuator Effects on Flow over Airfoil with Different Angle of Attacks
نویسنده(ها): ،
اطلاعات انتشار: هشتمین همایش انجمن هوافضای ایران، سال
تعداد صفحات: ۶
In this paper, effects of plasma actuator have been studied in flow control over airfoil NACA0021. For simulating plasma actuator effects, the electrostatic model has been applied. It is based on the assumption of different time scales that play different roles in the physics of the plasma actuator and allows decoupling the problem into two separate parts associated with: the plasma body force formation and the fluid flow response. By using this model, it is possible to simulate plasma actuator effects by inducing a body force field into Navier–Stokes equations.Airflow velocity was 5 m\s. The plasma actuator has been located in the leading edge of the airfoil. The efficiency plasma actuator in different angle of attacks has been studied.<\div>

۲Numerical simulation of plasma actuator effects on flow control over airfoil
نویسنده(ها): ،
اطلاعات انتشار: هفدهمین کنفرانس سالانه مهندسی مکانیک، سال
تعداد صفحات: ۵
In this paper effects of plasma acuator on flow over airfoil with different velocities have been studied. Plasma actuator effect has been simulated by introducing external body force field into navier –stokes equation.<\div>

۳Reducing Vibration Related Error in INS Performance by Limiting Measurement Bandwidth
نویسنده(ها): ،
اطلاعات انتشار: دومین کنفرانس ملی اویونیک ایران، سال
تعداد صفحات: ۷
In this paper, random vibration trial, as the most important environmental test for an inertial navigation system (INS), was investigated from the navigation point of view. Effect of random vibration test on INS performance was inspected to specify how random vibration increased the navigation error. A simple practical solution was proposed to decrease the vibration–related error in position and velocity estimation. Proposed method was simple, compatible, and real–time and had a hardware implementation without needing extra computations and accessories. Side effects of the proposed technique were examined; it was proved that they did not cause any restriction and had no disruptive effect in practice. Actual data of navigation grade INS were used to prove these claims.<\div>

۴Calibration of Embedded Inclinometers in Strapdown Inertial Navigation System by Two–axis Turntable
نویسنده(ها): ،
اطلاعات انتشار: نخستین کنفرانس ملی ناوبری، سال
تعداد صفحات: ۱۱
In this paper, a practical process is suggested for laboratory calibration of high accuracy inclinometers for use in strapdown inertial navigation system, by means of a two–axis turntable. First, the applied inclination–measuring sensor is introduced and its practical specifications like noise problem and nonlinearity are investigated. Thereafter, the application of inclinometer in a strapdown inertial navigation system explained. The definition of calibration tests, data acquisition and signal processing, error model selection and parameter estimation are described in details. This method is planned for embedded inclinometers in a strapdown inertial navigation system, which has an advantage compared to individual sensor calibration, because it compensates all mechanical deviations and installation errors. The procedure was implemented for two capacitive dual–axis inclinometers, and the results were examined by proper tests. By proposed technique, the inclinometers were successfully calibrated with accuracy up to seconds.<\div>
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