초록 ▼

For a switching of a magnitude of system gain in the driving of a load by a control system, a method of inhibiting formation of switching transients has a step of distinguishing between an estimate of a plant state, such as the attitude of a spacecraft, and an integral control state which allows the

For a switching of a magnitude of system gain in the driving of a load by a control system, a method of inhibiting formation of switching transients has a step of distinguishing between an estimate of a plant state, such as the attitude of a spacecraft, and an integral control state which allows the control system to provide actuation in response to long term disturbances, such as solar pressure, in operation of the system. In the case of a feedback configuration to the system with controller in a forward branch and an estimator in a feedback branch, a loop error signal serves to drive an actuator of the load via the controller. The method includes a further step of evaluating a portion of a controller input signal which is exclusive of an integral control state and which comprises a difference between a desired state and an estimate of the plant state. The evaluation step enables observation of an occurrence of a magnitude of the difference which falls within a range of values satisfying a criteria of minimal effect on the actuator. There is a further step of switching a value of the gain during the occurrence. Also, concurrently with the switching step, there is a scaling of an amplitude of the integral state by a factor inverse to a ratio of switched gain values.

대표청구항 ▼

[ What is claimed is:] [1.] A method of operating a control system to inhibit formation of transients during a switching of a magnitude a gain within the control system in order to drive a plant in the presence of a possible disturbance function, the control system having a controller, the method co

[ What is claimed is:] [1.] A method of operating a control system to inhibit formation of transients during a switching of a magnitude a gain within the control system in order to drive a plant in the presence of a possible disturbance function, the control system having a controller, the method comprising:applying a drive signal to actuation means of the system for driving the plant;evaluating a difference between desired states of the plant and the estimates of the plant states;observing said difference to determine an occurrence of a magnitude of the difference which falls within a range of values satisfying a predetermined criteria;waiting for performing said switching of the magnitude of said gain until the magnitude of said difference falls within said range of values; andswitching a value of the gain during said occurrence.