1. You can use a ‘chirp’ block to generate a sine wave with increasing frequency with time. You can tune the block parameters of the chirp block accordingly to achieve the desired output.
Refer to this Documentation Page.
2. If you need to increment the frequency of the sine wave after a time interval, you can model the sine wave as a function of Amplitude, frequency and time.
y = amplitude * sin( frequency * time + phase) + bias;
- For Example, Sine wave can be modeled in the following way as a function of amplitude, frequency and time, as mentioned in “What can I do if I really need to change the parameter of a block every time step?” section of this blog post.