Several DOF
Categories
Recent advances in active damping and vibration control
6 January 2002
This paper reviews some concepts used for active vibration control and vibration isolation. It is divided into two parts. Part 1 reviews some control strategies based on collocated control systems, which offer promising results for space and civil engineering applications. Part 2 (starting at section 4) is focused on automobile applications.
Stiff and soft stewart platforms for active damping and active isolation of vibrations
6 January 2002
As future astronomic missions will require more and more stringent resolution requirements, the high demand for an environment clean of vibrations and disturbance appears. This also leads to the need for high precision steering devices for fine pointing of sensitive optics with the highest possible accuracy. Several methods exist to reduce vibration levels: the first consists in isolating the sensitive system from the perturbation and the second in damping the structure vibration modes. Therefore, two Stewart platforms have been designed, manufactured and tested. The first is a soft hexapod that provides 6 degree-of-freedom (DOF) active isolation and the second is a stiff hexapod that provides active damping to whatever flexible payload attached/mounted to it. In addition, both hexapods have steering capabilities.
Design and tests of a demonstrator for filet compensation mechanism
5 January 2016
Future matrix sensors will acquire an area on ground and are then susceptible to image shift due to satellite movement during acquisition. Design, Build and Test a breadboard mechanism that could shift telescope line of sight and freeze observed area during image acquisition.
