Engineering topics
Publications and source records attributed to Gilbart, J. W..
The application of model referenced adaptive control theory to an optical tracking telescope is discussed. The capability of the adaptive technique to compensate for mount irregularities such as inertial variations and bearing friction is demonstrated via field test results on a large tracking telescope. Results are presented which show a 6 to 1 improvement in tracking accuracy for a worst-case satellite trajectory.
In order to minimize the effects of parameter variations in the dynamics of an optical tracking telescope, a model referenced parameter adaptive control system is described that - in conjunction with more traditional forms of compensation - achieves a reduction of rms pointing error by more than a factor of six. The adaptive compensation system utilizes open loop compensation, closed loop compensation, and model reference compensation to provide the precise input to force telescope axis velocity to follow the ideal velocity.
A parameter adaptive control technique is developed utilizing Liapunov's Direct Method. The design approach represents an improvement over previous methods in that only one derivative network is required for controller implementation. Furthermore, the technique may be applied to plants with right half plane zeros while maintaining a bounded control input.
Application of Liapunov method for parameter adaptive control of unknown plants
Liapunov design technique for model reference adaptive control systems with feedback and prefilter adjustable gains