FEEDBACK CONTROL SYSTEM
First Claim
1. Test apparatus for testing a moveable member subject to a load in use, the apparatus comprising:
- a load actuator to apply a load to the moveable member, a load controller that controls operation of the load actuator so as to apply a predetermined load to the moveable member as it is moved, and a damping controller that is responsive to a condition of the moveable member as it is moved and that generates a corresponding damping signal to control the damping effect of the load actuator on movement of the moveable member.
2 Assignments
0 Petitions
Accused Products
Abstract
A closed loop control system for controlling an actuator operating on a moveable member, includes a control device controlling operation of the actuator, a sensor responsive to a condition such as loading of the moveable member as it is moved by the actuator and adapted to generate a corresponding feedback control signal SL, and a damping device having a damping effect on the response of the actuator to the feedback control signal, the damping effect being varied in accordance with the movement of the moveable member so as to vary the response of the actuator. The damping effect is increased in the region of stationary states to render the system more stable, and reduced therebetween to make the system more responsive at increased speeds, and thereby more conformal to a required performance profile. The position or velocity of the moveable member can be used to control the damping effect, or a timer can be used to control the damping effect.
-
Citations
13 Claims
-
1. Test apparatus for testing a moveable member subject to a load in use, the apparatus comprising:
- a load actuator to apply a load to the moveable member, a load controller that controls operation of the load actuator so as to apply a predetermined load to the moveable member as it is moved, and a damping controller that is responsive to a condition of the moveable member as it is moved and that generates a corresponding damping signal to control the damping effect of the load actuator on movement of the moveable member.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
9. A loading simulation test system for controlling the load applied by a load actuator to a moveable member during movement of the latter comprising a load controller controlling operation of the load actuator including a load sensor responsive to the load applied by the load actuator to the moveable member and adapted to generate a corresponding load feedback control signal, a damping controller including a position or velocity sensor to sense the position or velocity of the moveable member and to generate a corresponding position or velocity signal that varies the damping effect of the load actuator in accordance with the position or velocity of the moveable member.
- 10. A method of testing a moveable member using a feedback control loop to control operation of an actuator that loads the moveable member, the method comprising providing a damping controller in the feedback control loop to dampen the response of the actuator to feedback control, and varying the damping effect of the damping controller on the response of the actuator in accordance with the movement of the moveable member.
- 11. A method of simulating loading of a moveable member during movement of the latter using a feedback control loop comprising a load controller controlling operation of an actuator applying loading to the moveable member, the method comprising providing a damping controller in the feedback control loop to dampen the response of the actuator to feedback control, and varying the damping effect of the damping controller on the response of the actuator in accordance with the movement of the moveable member.
Specification