초록 ▼

A closed-loop actuator control system includes a single PI controller for controlling one or more actuators to minimize an error between an engine operating parameter value and a reference parameter value. In multiple actuator systems, the control system of the present invention is operable to drive

A closed-loop actuator control system includes a single PI controller for controlling one or more actuators to minimize an error between an engine operating parameter value and a reference parameter value. In multiple actuator systems, the control system of the present invention is operable to drive one actuator to its upper limit before transferring control to the next actuator. The proportional gain block of the PI controller preferably includes a bumpless gain feature operable to limit the rate of change of the proportional gain to thereby provide smooth gain scheduling. A feedforward block may optionally be included that preferably includes the bumpless gain feature. The actuator control system further includes anti-windup logic operable to disable the PI integrator if the actuator drive signal is upper or lower limit bounded and the error signal is greater or less than zero respectively, thereby creating dynamic saturation of the PI integrator.

대표청구항 ▼

1. A closed-loop actuator control circuit, comprising:a first arithmetic circuit producing an error signal as a difference between an engine operating parameter signal and a reference parameter value; a controller responsive to said error signal to produce an actuator control signal; a first limiter

1. A closed-loop actuator control circuit, comprising:a first arithmetic circuit producing an error signal as a difference between an engine operating parameter signal and a reference parameter value; a controller responsive to said error signal to produce an actuator control signal; a first limiter responsive to said actuator control signal to produce a first actuator drive signal for driving a first actuator associated with a first engine control mechanism to minimize said error signal; and a second limiter responsive to a difference between said first actuator control signal and said first actuator drive signal to produce a second actuator drive signal, said second actuator drive signal driving a second actuator associated with a second engine control mechanism separate from said first engine control mechanism to minimize said error signal when said first actuator drive signal is limited by said first limiter to a maximum first actuator drive signal limit.