Study of the Use of a Nonlinear, Rate-Limited Filter on Pilot Control Signals

摘要

Analysis of pilot response in the performance of a closed-loop control situation has shown that a large remnant (noise) in the pilot's control output does not aid the control, but adds unwanted motion to the system response. The use of a filter on the pilot's control output could improve the performance of the pilot-aircraft system. What is needed is a filter with a sharp high frequency cutoff, no resonance peak, and a minimum lag at low frequencies. This investigation studies the usefulness of a nonlinear, rate-limited filter in performing the needed function. The effect of the nonlinear filter on the pilot's control output is compared with a linear first order filter and a no filter condition. , An analytical study using pilot models and a simulation study using experienced test pilots were performed.