Controller for a control system with non-linear filters, particularly for a magnetic-levitation vehicle

摘要

The invention relates to a controller for a control system comprising non-linear filters, which non-linearly converts input signals with low- and higher-frequency temporal variations, occurring during the operation, into controlled variables and from these into correcting variables for the controlled system in several controller channels. To achieve both excellent follow-up characteristics in the low-frequency range and small correcting variables in the high-frequency range, it is proposed to insert, at least into those controller channels which also deal with input signals (x) with higher-frequency components, for these input signals (x), for forming the associated controlled variables (y), in each case one non-linear filter (6) of an integration element (11), a limiter (12') for changing the integrator output signals (x1) and a differentiating element (13) connected to the output of the former, at the output of which differentiating element the new controlled variable (y) is present. The structure of the non-linear filter of timing elements and limiters has the advantage that the low-frequency signals are passed undelayed and virtually with the correct phase and amplitude, whilst high-frequency noise with high amplitudes is cut off. The control concept can be used, for example, for magnetic-levitation vehicles and hydraulic rudder drives.