An adaptive sliding mode control algorithm has been developed to achieve the desired transmissibility function for a microgravity isolation system with uncertainties in parameters such as umbilical stiffnesses. The theory has been presented for the design of an adaptive controller in the context of a single-degree-of-freedom system. The reference model corresponds to the desired transmissibility. A sliding line with the boundary layer is chosen in the state space consisting of error between the output of the actual system and the reference model and its derivative. The adaptation mechanism is based on the sliding mode control theory. The results from numerical simulations are presented. It has been found that the resulting transmissibility can be quite close to the desired function by properly selecting the system bandwidth and the boundary layer thickness.
All Science Journal Classification (ASJC) codes
- Aerospace Engineering