Method and arrangement for filtering digital, measured cycle-duration values, in particular in antiskid control devices on vehicles

US4136912A · kind A · utility

Assignee

• WABCO Westinghouse G.m.b.H. · DE

Inventors

• Karl Hesse · Sarstedt, DE
• Gerhard Ruhnau · Hannover, DE
• Wolfgang Gudat
• Peter Liermann · Barsinghausen, DE

Key dates

• Filing date: Oct 7, 1977
• Grant date: Jan 30, 1979
• Expiry date: Oct 7, 1997

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T8/173
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

This disclosure relates to a method and an arrangement for filtering disturbing signals in the digital measurement of the cycle duration for an antiskid control system for motor vehicles. The detrimental influence of short disturbances on the production of control signals is suppressed by means of the filtering process. The production of the control signals takes place in accordance with the result obtained from a comparison of the respective measured value .tau..sub.n with a reference value .tau..sub.B. The filtering is carried out in a manner so that when a digital measured value .tau..sub.n enters, a new reference value .tau..sub.B', is produced as a function of the difference between the reference value .tau..sub.B and the mean value obtained from the reference value .tau..sub.B and new measured value .tau..sub.n.