The model linearized to zero such that the torque, tau, has no effect on the angle or
angular velocity. To find the source of the zero linearization, you can use a
LinearizationAdvisor object.
Linearize Model with Advisor Enabled
To collect diagnostic information during linearization and create an advisor for
troubleshooting, first create a linearizeOptions option set, specifying the
StoreAdvisor option as true.
opt = linearizeOptions('StoreAdvisor',true);
Linearize the Simulink model using this option set. Return the info output argument,
which contains linearization diagnostic information in a LinearizationAdvisor object.