Method for producing a motor servo signal for controlling a servomotor (actuator), and a circuit arrangement for carrying out this method

摘要

The invention relates to a method for producing a motor servo signal (Xa) for controlling a servomotor, and to a circuit arrangement for carrying out this method. An input signal (Xe) is formed by required value/actual value comparison. A difference signal (X2) is formed by subtraction of a low-pass signal (X4), which is produced by low-pass filtering of a first switching signal (X3) from which the motor servo signal (Xa) is derived, from the input signal (Xe). The first switching signal (X3), which has three states, is produced from this difference signal (X2). When the input signal (Xe) is within a neutral zone, a second switching signal is formed from said input signal, which consists of pulse pairs having bipolar pulses of equal duration in each case. The second and first switching signals (X3, X7) are combined to form the motor servo signal (Xa). The frequency of occurrence of the pulse pairs is proportional to the error between the actual value (Xi) and the required value (Xs). <IMAGE>