| 摘要 |
PROBLEM TO BE SOLVED: To reduce flexibility and resulting internal deformations by increasing stiffness and/or damping of a body of an object.SOLUTION: A positioning system to position a movable object having a body includes an object position measurement system, an object actuator, and an object controller. The positioning system further includes a stiffener to increase the stiffness and/or to damp relative movements within the body of the object. The stiffener includes; one or more sensors each arranged to determine a measurement signal representative of an internal strain or relative displacement in the body; one or more actuators each arranged to exert actuation force on a part of the body; and at least one controller configured to provide, on the basis of the measurement signal of at least one of the sensors, an actuation signal to at least one of the actuators to increase the stiffness and/or to damp movements within the body.SELECTED DRAWING: Figure 3 |
