Title :
Analytical control synthesis for adaptive flying-qualities adherence
Author :
Barren, R.L. ; Larson, Edward C. ; Ward, David G. ; Stayman, J. Webster
Author_Institution :
Baron Associates Inc., Charlottesville, VA, USA
Abstract :
An analytical procedure is described for synthesis and stability assessment of control systems for adaptive flying-qualities adherence with linear and nonlinear aircraft dynamics. This procedure directly incorporates desired low-order equivalent system (LOES) frequency and damping parameter values into the synthesis of control laws that provide optimal adherence to MIL-STD-1797A guidelines. The procedure is used to derive a longitudinal control law for a contemporary fighter aircraft. Simulation results are presented. It is believed that this approach offers improved flying qualities and may be suitable for mitigation of pilot induced oscillation problems because its closed-loop phase lag is essentially that of the LOES specification
Keywords :
aircraft control; closed loop systems; control system synthesis; damping; digital simulation; military aircraft; military standards; nonlinear control systems; oscillations; self-adjusting systems; stability; LOES specification; MIL-STD-1797A; adaptive flying-qualities adherence; analytical control synthesis; closed-loop phase lag; damping parameter values; fighter aircraft; frequency; linear aircraft dynamics; longitudinal control law; low-order equivalent system; nonlinear aircraft dynamics; pilot induced oscillation; simulation; stability assessment; Adaptive control; Adaptive systems; Aerospace control; Aircraft; Control system synthesis; Frequency synthesizers; Nonlinear control systems; Nonlinear dynamical systems; Programmable control; Stability analysis;
Conference_Titel :
Aerospace and Electronics Conference, 1995. NAECON 1995., Proceedings of the IEEE 1995 National
Conference_Location :
Dayton, OH
Print_ISBN :
0-7803-2666-0
DOI :
10.1109/NAECON.1995.521987
