Synthesis　of　Fault　Trees　in　Process　Systems　（Part　3）

Combined Systems　of　Feedback　and　Feedfoward　Control　Loops

Abstract

Faut　trees　for　real　systems　can　get　very　complicated，　and　algorithms　for　tree　generation　are required to be applied to complex systems．This paper presents an algorithm for the synthesis of fault trees　in　control　systems　which　employ　the　combination　of　feedback　control　loops，and　the　one　of feedback　and　feedfoward　control　loop.　The　algorithm　is　an　extension　of　the　companion　paper　Part 1 of this series．It should be noted that the feedback control loop is located in the top structure of fault trees，but　contains　the　feedfoward　control　loop　as　one input.