Читать книгу PID Passivity-Based Control of Nonlinear Systems with Applications - Romeo Ortega - Страница 25

As a final comment of this section, we note that in van der Schaft (2016), PID control is viewed from a different perspective. Namely, assuming that is computable, it is shown that the closed‐loop system can be represented as a pH system with algebraic constraints. However, leaving aside the complexity of computing , the stability analysis of this kind of systems remains an essentially open question.