Condition_Oscillatory class

Contents

Description

This is a sub-class of the Condition class for the implementation of Oscillatory conditions.

In a given time t, an oscillatory condition value y is obtained as:

$$y(t) = y_{0} + \lambda sin \left ( \frac{2\pi}{\tau}(t-t_{0}) + \phi \right )$$

Where:

$y_{0}$: Base value for oscillation

$\lambda$: Oscillation amplitude around base value

$\tau$: Oscillation period

$\phi$: Oscillation phase shift

$t_{0}$: Initial time (when condition is activated)

classdef Condition_Oscillatory < Condition

Public properties

    properties (SetAccess = public, GetAccess = public)
        base_value double = double.empty;   % base condition value for oscillation
        amplitude  double = double.empty;   % amplitude of oscillation around base value
        period     double = double.empty;   % period of oscillation
        shift      double = double.empty;   % shift from initial point of oscillation (phase angle)
    end

Constructor method

    methods
        function this = Condition_Oscillatory()
            this = this@Condition(Condition.OSCILLATORY);
            this.setDefaultProps();
        end
    end

Public methods: implementation of super-class declarations

    methods
        %------------------------------------------------------------------
        function setDefaultProps(this)
            this.base_value = 0;
            this.amplitude  = 0;
            this.period     = inf;
            this.shift      = 0;
        end

        %------------------------------------------------------------------
        function val = getValue(this,time)
            val = this.base_value + this.amplitude * sin(2*pi*(time-this.init_time)/this.period + this.shift);
        end
    end

end


Published with MATLAB® R2019b