A numerical dynamic-aerodynamic interface for simulating the separation dy­n­a­m­ic­s of co­n­­s­t­r­a­i­ned strap-on boosters jettisoned in the atmosphere is presented. A 6-DOF multi body dynamic solver ،using Constraint For­ce Equation Methodology is coupled with a numerical time dependent Euler flow solver. An automatic dyna­m­i­­c mesh updating proc­e­d­ure is employed using smoothing and l...

Many kinds of mechanical systems such as a robot, a machine tool, a vehicle and so on have multi bodies which have the relative motion each other. When we develop the mechanical systems, it is important to predict the motion and the interaction forces before they are actually manufactured after the design. Also, multi flexible body dynamics can be necessary for some mechanical systems including...

Many applications, including fully-coupled reacting flows and multiscale applications, simultaneously resolve multiple degrees of freedom (DOFs). Simultaneously, preconditioning techniques, such as segregated preconditioners for fully-coupled problems, separate variables for efficient sub-operator resolution via fast single DOF solver capabilities such as multigrid or direct solvers that would ...

Abstract. To absorb the vibration of car body high-speed train in multiple degrees freedom, a multi-degree freedom dynamic absorber (MDOF DVA) is proposed. Installed under body, natural frequency MDOF DVA from each DOF can be designed as for every single degree body. Hence, 12-DOF model including main system and an established, principle Multi-DOF absorption analyzed by combining design method ...

Abstract When the oil supply is not adequate to maintain ideal lubrication, angular contact ball bearing will enter into starved lubrication regime resulting in potential performance degradation and consequently severe failures. To study effects of on bearing, this paper first proposes a multi-degree-of-freedom (DOF) tribo-dynamic model by introducing five-DOF inner ring, six-DOF balls, cage. T...

An unsteady two-dimensional finite-volume solver was developed based on Van Leer’s flux splitting algorithm in conjunction with “Monotonic Upstream Scheme for Conservation Laws (MUSCL)” limiters to improve the order of accuracy and the two-layer Baldwin-Lomax turbulence model was also implemented. Two test cases were prepared to validate the solver. The computed results were compared with the e...

Abstract Dynamic simulation is critical for robotic design and control. In this study, a modular platform developed using novel explicit dynamic modeling method. Combined with PD controller globally linearized compensator, the method presents an canonical form tree-chain closed-chain multi-body systems. Paired new approach, makes it convenient modeling, performs well in real-time high update fr...

Many people experience vibration effects on whole-body throughout their lives frequently. Vibrating energy absorbed is exposed all-body caused with vibration hazard in the vertically on body and biodynamic responses from body in speed 2.37 to 5.14 m/s could captivate with car seat on user body, so the vibration energy transferred to a seated people body. In this paper, the human body is modeled...

There are many design factors and choices when mounting a vision system for robot control. Such factors may include the kinematic and dynamic characteristics in the robot’s degrees of freedom (DOF), which determine at what velocities and fields-of-view a camera can achieve. Another factor is that additional motion components (such as pan-tilt units) are often mounted on a robot and introduce sy...