Method for filtering guidance moment signal in electromechanical steering system of motor car, involves adjusting parameters of filter dependent on oscillation and driving conditions if parasitic oscillation is incorporated in signal

摘要

The method involves determining part of a reference value signal i.e. guidance moment signal (LMR), as a value signal is filtered by a filter (5) e.g. low-pass filter. A determination is made to check whether parasitic oscillation is incorporated in the value signal by a parasitic oscillation determination unit (2). A driving condition (F) is determined by a driving condition determination unit (3). Parameters e.g. central frequency, of the filter are adjusted by a parameterization unit (4) dependent on the oscillation and the condition if the oscillation is incorporated in the value signal. The driving condition comprises a state quantity vector with state vehicle velocity.