DIGITAL TWO-STEP CONTROLLER FOR AN ACTUATOR ELEMENT

摘要

The invention relates to a digital two-step controller for an actuator element (1) with an A/D converter (31), an output driver (11) and control means (30) with a memory. The invention is characterised in that an analogue measuring signal (UI) is received from the actuator, is converted in the A/D converter into an actual digital value, and is input into a first region of the memory of the control means. The actual digital value input into the first region of the memory is compared with a theoretical digital value for the actuator, which value is stored in a second region. The output (32) of the control means to the output driver is set at ZERO when the actual digital value is larger or equal to the theoretical digital value. The output of the control means to the output driver is set at ONE when the theoretical digital value is less than the actual digital value. After a sampling period DELTA t another analogue measuring signal is received from the actuator and the regulation steps are repeated in an interrupt called in cycles and corresponding to the sampling interval.