Butterworth Archive
Analyzing Shaft Twist And Repairing Damaged Tachos
Posted on October 19, 2005 | 1 CommentA shaft has been instrumented with two shaft encoders, one at each end. Each shaft encoder gives out a once/rev pulse and a 720 pulses/rev signal. Each signal was digitised...
Audio Equalisation Filter & Parametric Filtering
Posted on May 17, 2005 | No CommentsWhen working with audio signals a common requirement is to be able to equalise, cut or boost various frequency bands. A large number of hardware devices on the market provide...
High Pass Filtering And Tacho Signals
Posted on June 6, 2001 | 2 CommentsIt is sometimes necessary to pass a signal through a high pass filter to eliminate low frequency signals. These may arise for instance from whole body vibrations when perhaps our...
Removing Phase Delay Using Phaseless Filtering
Posted on June 6, 2001 | No CommentsIn many instances we need to filter a signal to remove unwanted frequencies. If we use classical filters such as Butterworth, Chebyshev or even Bessel then a phase delay is...
