Abshaet-In this article, a new control method
for rotational motion control of a flexible ann by
using an LQN control system is proposed. This
control system is based on combining discretetime
state feedback control by Linear Quadratic
optimal control theory with neuro-adaptive
feedforward control by a neural network model.
While the discrete-time state feedback control
loop provides the elastic vibration control, the
nenro-adaptive feedforward control loop controls
the endpoint position. Numerical simulation is
carried out for a single flexible arm by employing
the proposed LQN control system. From the
simulation results, it is confirmed that the elastic
vibration in positioning control is effectively
suppressed, and control error of the endpoint
position decreases gradually with the passing of
time, and in steady-state, the control error
becomes almost zero. Consequently, desired
endpoint motion is achieved, showing the
effectiveness of the proposed control method by
use of the LQN control system.