It is shown that a feedback system is robustly stable with respect to small time delays if and only if it is stable for zero time delay and a structured singular value is less than one.
- Structured singular value
- Time delays
Meinsma, G., Fu, M., & Iwasaki, T. (1999). Robustness of stability of feedback systems with respect to small time delays. Systems and control letters, 36(2), 131-134. https://doi.org/10.1016/S0167-6911(98)00075-9