TY - GEN

T1 - Nonlinear phase shift compensator for pilot-induced oscillations prevention

AU - Andrievsky, Boris

AU - Kuznetsov, Nikolay

AU - Kuznetsova, Olga

AU - Leonov, Gennady

AU - Seledzhi, Svetlana

PY - 2016/9/29

Y1 - 2016/9/29

N2 - The pilot-induced oscillation (PIO) is denoted as unintended steady fluctuation of the piloted aircraft, generated due to the efforts of the pilot to control the aircraft. The main non-linear factor leading to the PIO is, generally, rate limitations of the aircraft control surfaces, resulting in a delay in the response of the aircraft to pilot commands. Due to the tight relationship between magnitude and phase frequency responses for linear systems, applicability of the linear compensator for mentioned aim is highly restricted. This leads to the idea of employing the nonlinear phase shift compensator. In the control theoretic literature, various nonlinear corrective devices (NCD) are elaborated, which make it possible to change the phase-frequency and amplitude-frequency responses independently on each other. In the paper, a novel phase shift compensator based on nonlinear correction technique is presented and numerical comparative study for two models of a pilot for PIO prevention during the flight is given. The results obtained demonstrate that the proposed method in several times increases the admissible gain of the 'airplane-pilot' loop as compared with non-corrected system.

AB - The pilot-induced oscillation (PIO) is denoted as unintended steady fluctuation of the piloted aircraft, generated due to the efforts of the pilot to control the aircraft. The main non-linear factor leading to the PIO is, generally, rate limitations of the aircraft control surfaces, resulting in a delay in the response of the aircraft to pilot commands. Due to the tight relationship between magnitude and phase frequency responses for linear systems, applicability of the linear compensator for mentioned aim is highly restricted. This leads to the idea of employing the nonlinear phase shift compensator. In the control theoretic literature, various nonlinear corrective devices (NCD) are elaborated, which make it possible to change the phase-frequency and amplitude-frequency responses independently on each other. In the paper, a novel phase shift compensator based on nonlinear correction technique is presented and numerical comparative study for two models of a pilot for PIO prevention during the flight is given. The results obtained demonstrate that the proposed method in several times increases the admissible gain of the 'airplane-pilot' loop as compared with non-corrected system.

KW - Actuator modeling

KW - Compensator

KW - Nonlinear

KW - Oscillations

KW - Phase shift

KW - Pilot-aircraft model

KW - Rate limitations

UR - http://www.scopus.com/inward/record.url?scp=84994626867&partnerID=8YFLogxK

U2 - 10.1109/EMS.2015.43

DO - 10.1109/EMS.2015.43

M3 - Conference contribution

AN - SCOPUS:84994626867

T3 - Proceedings - EMS 2015: UKSim-AMSS 9th IEEE European Modelling Symposium on Computer Modelling and Simulation

SP - 225

EP - 231

BT - Proceedings - EMS 2015

A2 - Romero, Gregorio

A2 - Orsoni, Alessandra

A2 - Al-Dabass, David

A2 - Pantelous, Athanasios

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 9th UKSim-AMSS IEEE European Modelling Symposium on Computer Modelling and Simulation, EMS 2015

Y2 - 6 October 2015 through 8 October 2016

ER -