Space subsystems design: (navigation, control, structure and…)
Hamed Kashani
Volume 16, Issue 3 , September 2023, , Pages 27-36
Abstract
Aerospace systems and subsystems are subjected to impulsive loads due to several reasons like engine start and burnout, separation, and so on. These loads may make temporary or permanent failures in some sensitive components or subsystems. To avoid these failures some constraints should be consider in ...
Read More
Aerospace systems and subsystems are subjected to impulsive loads due to several reasons like engine start and burnout, separation, and so on. These loads may make temporary or permanent failures in some sensitive components or subsystems. To avoid these failures some constraints should be consider in design mechanical process. Another approach can be reducing the load level in transmission path without any change in the source of load and without adding any new component and only with design optimization of available components i.e, structural joints destructive effects of impulsive loads. This paper uses analytical results of joints behavior to present practical solution for minimizing load transmission through the joint
M. Tahaye Abadi; H. Kashani; N. Ariaeifar
Volume 2, Issue 1 , April 2009, , Pages 25-34
Abstract
The paper presents a kinematical model for a random positioning system which simulates microgravity conditions on the ground. The random positioning system contains two frames, with an experiment platform. The frames are rotated around two perpendicular axes by a random angular velocity that it causes ...
Read More
The paper presents a kinematical model for a random positioning system which simulates microgravity conditions on the ground. The random positioning system contains two frames, with an experiment platform. The frames are rotated around two perpendicular axes by a random angular velocity that it causes continuous changes in the orientation of experimental sample relative to the gravity’s vector. The angular velocity between random values is changed based on specific function in order to limit the generated spurious acceleration below a preselected threshold. The kinematical model yields criteria to evaluate the microgravity conditions on ground base. Such criteria are defined based on the mean values of acceleration and gravity components which are sensed by the rotating experimental sample.
