Title :
An analysis of the destabilizing effect of daisy chained rate-limited actuators
Author :
Berg, Jordan M. ; Hammett, Kelly D. ; Schwartz, Carla A. ; Banda, Siva S.
Author_Institution :
Wright Lab., Wright-Patterson AFB, OH, USA
fDate :
3/1/1996 12:00:00 AM
Abstract :
The response of a rate-limited actuator will lag behind a rapidly changing command. This lag may destabilize the closed-loop system. When multiple actuators are arranged in a daisy chain this effect can be significantly worse. The cost of daisy chaining, in terms of lost stability margin, is estimated analytically and numerically. A comparison of a simple daisy chain with a simple “cooperative” control selector shows that the daisy chain may cause as much as 30° of additional phase lag
Keywords :
actuators; closed loop systems; delays; stability; closed-loop system; cooperative control selector; daisy chained rate-limited actuators; destabilizing effect; multiple actuators; stability margin; Actuators; Aerodynamics; Aerospace control; Aircraft; Costs; Delay effects; Elevators; Nonlinear dynamical systems; Stability analysis; Torque;
Journal_Title :
Control Systems Technology, IEEE Transactions on
