Fuzzy systems are typically piecewise defined, and might be differentiable between the breakpoints, but typically have discontinuous first or second derivatives.
As such, most fuzzy systems are not suitable for use with any of the ode*() routines, all of which require continuous first and second derivatives within any one call.
The way to approach it with ode45() or similar would be to use an event function to terminate the integration each time you passed between fuzzy sub-domains.
