Controller Complexity

Abstract

For implementation of controllers there is a strong drive for simplicity. Simplicity results in reduced hardware, which in turn means a cheaper control system which weighs less and takes up less space. Simplicity may also result in greater integrity of the control system which is vital for aerospace applications. The penalty for large hardware requirements is compounded by the required duplication of controller implementation — for example the A320 Airbus triplicates all hardware for the control law, plus there is a fourth independently designed back-up control law [60]. In Part II, the implementation of control law 005 is restricted by existing hardware in the aircraft, and complexity becomes a central issue.