URGENT help on TSA with tach signal

I have a dataset that has the tach signal in colum 3 and the vib signal in colum 1.

I am trying to perform time synchronous averaging of this signal using the matlab inbuilt function (tsa(data(:,1), fs, tach,'PulsesPerRotation', 10);)

but I keep getting the follwoing error

Please can someone help me out with this as I am new to MATLAB?

Answer 1

[dpb]

I've not used it, but doc (and error message) indicate that the time pulse input is either a fixed scalar or increasing time for the pulses--

tp — Pulse times

scalar | vector

Pulse times, specified as a scalar or a vector.

• Scalar — a constant time interval over which rotations occur.
• Vector — nonnegative, strictly increasing instants that define constant rotational phase.

Use tachorpm to extract tachometer pulse times from a tachometer signal.

It appears maybe from your description and the error you have an actual tachometer input signal, not the pulse times; for starters try the hint above with

tsa(data(:,1), fs, tachorpm(tach));

as a guess without seeinng the data or knowing for sure what your variable tach is -- I'm presuming it is data(:,3) from the description.

[Ola Ola]

Thank you for the explanation@dpb

[aparna subramaniam ashwin]

Pulse time vector, is strictly increasing. Hence use this line to extract TP vector.

TP1=find(TP);