Electricity: motive power systems – Positional servo systems – 'reset' systems
Patent
1991-11-25
1993-12-07
Ip, Paul
Electricity: motive power systems
Positional servo systems
'reset' systems
318560, 364162, 364179, G05B 1304
Patent
active
052686256
ABSTRACT:
A servosystem comprising an adaptive digital controller (1) with an input signal (r.sub.t), an output control signal (u.sub.t) to the system (2) being controlled, and an input feedback signal (y.sub.t) from the system being controlled, the controller (1) incorporating an estimator (3) which operates recursively in response to the output control signal (u.sub.t) and feedback signal (y.sub.t) to estimate the values of parameters of a predetermined mathematical model (4) of the system being controlled and which makes use of a forgetting factor (.lambda.) to weight previous values of said parameters before these values are used in combination with current values of said output control and feedback signals (u.sub.t, y.sub.t) in each recursive estimation cycle, said output control signal (u.sub.t) being adapted in accordance with said estimated values of the parameters; characterised in that the controller (1) further incorporates an excitation monitor (3) which is responsive to the dynamic variability of the input demand and feedback signals (r.sub.t, y.sub.t) and operates to suspend adaptation of said output control signal (u.sub.t) below a predetermined lower threshold of dynamic variability (.alpha.) where the estimated process would otherwise have an adverse effect on said output control signal (u.sub.t).
REFERENCES:
patent: 4195337 (1980-03-01), Bertrand et al.
patent: 4539633 (1985-09-01), Shigemasa et al.
patent: 4697127 (1987-09-01), Stich et al.
patent: 5166873 (1992-11-01), Takatsu et al.
Dowty Aerospace Gloucester Limited
Ip Paul
LandOfFree
Adaptive control servosystems does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Adaptive control servosystems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adaptive control servosystems will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2018178