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UnWrapper

by Giampiero Campa

19 Nov 2004 (Updated 24 Nov 2004)

Code covered by the BSD License

Unwraps angles so that continuity is restored.

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Description

Normally, the output of functions that return angles (e.g. atan2) is strictly constrained within the range 0 to 2*pi or within the range -pi to pi.

Therefore, even if the inputs change continuously, the angle will exhibit 2*pi jumps across the limits, which is sometimes undesirable (e.g. when the angle drives a control system).

This block unwraps an input angle to the whole real axis so that it does not make 2*pi jumps anymore.

In order to distinguish jumps from normal behavior, an upper bound on the maximum time derivative of the input is assumed.

Required Products

Simulink

MATLAB release

MATLAB 5.3.1 (R11.1)

Tags for This File
Everyone's Tags	angle, atan, atan2, jumps, phase, simulink, unwrap, wrap
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Tag Activity for this File
Tag	Applied By	Date/Time
simulink	Giampiero Campa	22 Oct 2008 07:36:10
angle	Giampiero Campa	22 Oct 2008 07:36:10
wrap	Giampiero Campa	22 Oct 2008 07:36:10
unwrap	Giampiero Campa	22 Oct 2008 07:36:10
phase	Giampiero Campa	22 Oct 2008 07:36:10
atan2	Giampiero Campa	22 Oct 2008 07:36:10
atan	Giampiero Campa	22 Oct 2008 07:36:10
jumps	Giampiero Campa	22 Oct 2008 07:36:10

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