A GENERIC CONTROL ANTICIPATION PARAMETER FOR AIRCRAFT HANDLING QUALITIES EVALUATION

The established control anticipation parameter longitudinal handling q ualities criterion is based on the assumption that the short term dyna mic response of the aeroplane is classical, or second-order-like. Mode rn fly-by-wire aircraft often have longitudinal short term dynamics wh ich are not second-order-like and to which it is difficult to apply th e criterion. This paper presents a proposed generic control anticipati on parameter which is a modified version of the control anticipation p arameter and which may be applicable to both unaugmented and augmented aircraft of all types. The appropriateness of the modified criterion was illustrated by designing a number of command and stability augment ation control laws, constrained to meet the criterion, for application to a medium weight fly-by-wire civil transport aircraft. The handling characteristics conferred by the control laws were assessed in a seri es of flight simulator trials, the results of which are briefly,resent ed.