“…It is well known that singular systems, which are also referred to as descriptor systems, differential algebraic systems, implicit systems, or semistate‐space systems have been widely studied in the past three decades. They have a great amount of interests due to their extensive applications in various areas, such as economic systems, chemical processes, electrical networks, power systems, robotic systems, and they often appear in many other theoretical and practical research studies . In recent years, great number of the existing results in the literature have been reported for the analysis and synthesis of the problems of stability, stabilization and control of singular systems with time‐delay, especially in the case of time‐varying delay, because time‐delay often appears in the most of singular systems; see, e.g.…”