Algorithm for zero-crossing detection with variable-step solver
Model Configuration Pane: Solver
The algorithm for zero-crossing detection detects the occurrence of a zero crossing and then locates the time at which the zero crossing occurred through a process called bracketing. Use this parameter to specify whether the software uses a nonadaptive algorithm that always locates when the state value crosses zero or an adaptive algorithm that allows for tolerance in the bracketing process.
This option uses the zero-crossing algorithm present in the Simulink® software prior to Version 7.0 (R2008a). The nonadaptive algorithm detects and locates zero crossings accurately but might decrease simulation speed for systems with strong chattering, or high-frequency oscillation around the zero-crossing point, also known as Zeno behavior.
This option uses an improved zero-crossing algorithm that dynamically determines whether to use bracketing locate the precise time at which the zero crossing occurred. The adaptive algorithm can improve simulation speed for systems with strong chattering.
Adaptivealgorithm enables the Signal threshold parameter. The value of the Signal threshold parameter determines when the state value is close enough to zero for the adaptive algorithm to stop bracketing.
The table summarizes recommended values for this parameter based on considerations related to code generation.
|Safety precaution||No impact|
|Type: string | character vector|
Introduced in R2008a