Block Category: Boolean
Inputs: Real, complex, or fixed-point scalars, or vectors or matrices.
On the input connector tabs, “l” represents the x1 and “r” represents the x2.
Description: The >= block produces an output signal of 1 if and only if input signal x1 is greater than or equal to input signal x2. Otherwise, the output is 0. On the connector tabs, “l” represents x1 and “r” represents x2.
Right-click the >= block to assign a different function to the block.
1. Simple if-then-else construct
Consider a variable y such that:
If x ≥ 0.5 then y = sin(t); else y = 1
where t is simulation time. Let x be a unit step delayed by 3 sec. This is usually represented as u(t - 3). This system is realized as:
Until the onset of the step input at t = 3 sec, the Boolean inequality x ≥ 0.5 evaluates to false and y takes on a value of 1. At t = 3 sec, the Boolean inequality evaluates to true and remains true for the duration of the simulation duration. Consequently, from this point onwards, y takes on the value of sin(t).