Search - velocity

Search - velocity - List

[Books] StrapdownInertialNavigationIntegration DL : 0: This paper provides a rigorous comprehensive approach to the design of the principal software algorithmsutilized inmodern-day strapdown inertial navigationsystems: integration of angular rate into attitude, acceleration transformation/integration into velocity, and integration of velocity into position.
Date : 2025-12-23 Size : 196kb User : huzhou
[Books] sifudianjiyuanliyuyingyong DL : 0: Servomotors are available as AC or DC motors. Early servomotors were generally DC motors because the only type of control for large currents was through SCRs for many years. As transistors became capable of controlling larger currents and switching the large currents at higher frequencies, the AC servomotor became used more often. Early servomotors were specifically designed for servo amplifiers. Today a class of motors is designed for applica-tions that may use a servo amplifier or a variable-frequency controller, which means that a motor may be used in a servo system in one application, and used in a variable-frequency drive in another application. Some companies also call any closed-loop system that does not use a stepper motor a servo system, so it is possible for a simple AC induction motor that is connected to a velocity controller to be called a servomotor. -Servomotors are available as AC or DC motors. Early servomotors were generally DC motors because the only type of control for large currents was through SCRs for many years. As transistors became capable of controlling larger currents and switching the large currents at higher frequencies, the AC servomotor became used more often. Early servomotors were specifically designed for servo amplifiers. Today a class of motors is designed for applica-tions that may use a servo amplifier or a variable-frequency controller, which means that a motor may be used in a servo system in one application, and used in a variable-frequency drive in another application. Some companies also call any closed-loop system that does not use a stepper motor a servo system, so it is possible for a simple AC induction motor that is connected to a velocity controller to be called a servomotor.
Date : 2025-12-23 Size : 972kb User : 徐永荣
[Books] velocity DL : 0: velocity的一个例子，开始学VELOCITY的朋友可以-An example of velocity, the beginning of school friends can look at the VELOCITY
Date : 2025-12-23 Size : 8.46mb User : kaka
[Books] computational-fluid-dynamics--cfd--analysis-of-na DL : 0: In this book , a low-speed airfoil over the NACA 0012 airfoil at 2° and 14° attack angles with the given inlet velocity of 0.25 m/s, was modeled and computational fluid dynamic (CFD) analysis were performed using FLUENT in ANSYS. The Reynolds number based on the chord is roughly 𝑅 𝑒 = 2.88 × 106. The flow was modeled as incompressible and inviscid. All setup and procedures were done by following the steps provided Cornel University website. Though, mesh independence was achieved for 2° attack angle, for 14° attack angle which is more than the stall angle, mesh independence was not achieved. Lift and drag coefficient increases as the number of mesh element or the attack angle increases.-In this book , a low-speed airfoil over the NACA 0012 airfoil at 2° and 14° attack angles with the given inlet velocity of 0.25 m/s, was modeled and computational fluid dynamic (CFD) analysis were performed using FLUENT in ANSYS. The Reynolds number based on the chord is roughly 𝑅 𝑒 = 2.88 × 106. The flow was modeled as incompressible and inviscid. All setup and procedures were done by following the steps provided Cornel University website. Though, mesh independence was achieved for 2° attack angle, for 14° attack angle which is more than the stall angle, mesh independence was not achieved. Lift and drag coefficient increases as the number of mesh element or the attack angle increases.
Date : 2025-12-23 Size : 3.52mb User : ahmed