No abstract

This paper describes investigations on adaptive vibration control and shape adjustment of truss structures making use of the active member actuator. The actuator was manufactured in an attempt to achieve these functions by linear actuating. Fundamental characteristics were examined statically and dynamically. Numerical simulations of planar truss model with the configuration of one pair of collocated actuator and sensor shows that a state observer can estimate truncated modes well and the excited vibration can be controlled rapidly. ,1. of IN TELL.

In the field of structural dynamics of large space structure (LSS), control/structure interaction technologies have been attracting much attention of researchers, and various types of control theory have beer, proposed. Meanwhile, it is important to develop actuators for the use of structural control. Piezoelectric device has some advantages characteristics such as compact size, high frequency response, low energy consumption over the other devices. With this background a uniquely designed piezoelectric actuator both for active dumping and shape adjustment has been preliminarily developed for experimental use. This paper describes the experimental results of the actuator for active dumping of planar truss and for statical or dynamical shape adjustment. And numerical simulations of planar truss with minimum numbers of pairs of collocated actuators and sensors show that a state observer can estimate truncated modes precisely and that the excited vibration can be dumped out rapidly.