Method for digitally filtering a signal burdened with noise and a control system for a vehicle
AssigneeContinental Aktiengesellschaft
InventorsUwe Creutzburg, Hermann Hoinkaus, Andreas Rieckmann
Life of this patent
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Abstract
A noise-burdened signal is filtered in accordance with a method of digitally filtering to filter out the noise component. The method includes inputting a signal into a digital filter of a filter length (K+1) wherein the filter length is less than the period of the fundamental frequency of the signal. A signal component of an order (m) is filtered from the signal based on earlier scanning values of the signal within the filter length. A filtered signal value is then outputted.
Claims18
A method for digitally filtering a noise-containing signal for filtering out components of noise, the signal having a fundamental frequency and the method comprising the steps of:
- inputting said noise-containing signal into a digital filter having a filter length (K) less than the period of said fundamental frequency;
- filtering out a signal component of an order (m) from said signal based on earlier scanning values of said signal within said filter length (K);
- and,
- outputting a filtered signal value.
A method of controlling the driving dynamic of a vehicle, the method comprising the steps of:
- filtering an output signal of a sensor for detecting a vibration of the vehicle by carrying out the following steps:
- (a) inputting said noise-containing signal into a digital filter having a filter length (K) less than the period of said fundamental frequency;
- (b) filtering out a signal component of an order (m) from said signal based on earlier scanning values of said signal within said filter length (K);
- and,
- (c) outputting a filtered signal value;
- determining a time point of reaching a pregiven value of said output signal utilizing the filtered signal values;
- and,
- controlling one or several driving-dynamic parameters of said vehicle based on said time point.
A computer program comprising a method for digitally filtering a noise-containing signal for filtering out components of noise, the signal having a fundamental frequency and the method comprising the steps of:
- inputting said noise-containing signal into a digital filter having a filter length (K) less than the period of said fundamental frequency;
- filtering out a signal component of an order (m) from said signal based on earlier scanning values of said signal within said filter length (K);
- and,
- outputting a filtered signal value.
A control system for at least one driving-dynamic parameter of a vehicle, the control system comprising:
- a sensor for detecting a vibration of said vehicle or a component of said vehicle and for outputting an output signal indicative of said vibration;
- computer means for carrying out a method for digitally filtering said output signal in accordance with a method including the steps of:
- inputting said noise-containing signal into a digital filter having a filter length (K) less than the period of said fundamental frequency;
- filtering out a signal component of an order (m) from said signal based on earlier scanning values of said signal within said filter length (K);
- and, outputting a filtered signal value;
- said computer means also functioning to determine a time point of reaching a pregiven value of said output signal utilizing said filtered signal value;
- and,
- control means for controlling one or several driving-dynamic parameters of said vehicle based on the determination of said time point.
Dependencies are inferred from the claim text.