Download Adaptive systems in control and signal processing, 1989 : by Michael A Johnson; International Federation of Automatic PDF

By Michael A Johnson; International Federation of Automatic Control

The Symposium coated 3 significant parts: adaptive keep watch over, identity and sign processing. In all 3, new advancements have been mentioned protecting either theoretical and purposes examine. in the topic region of adaptive regulate the dialogue concentrated round the demanding situations of sturdy keep watch over layout to unmodelled dynamics, powerful parameter estimation and greater functionality from the estimator, whereas the papers on identity took the subject of it being a bridge among adaptive regulate and sign processing. the ultimate region checked out facets of sign processing: recursive estimation and adaptive filters.

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Additional info for Adaptive systems in control and signal processing, 1989 : selected papers from the 3rd IFAC Symposium, Glasgow, UK, 19-21 April 1989

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Control structure. 110P ----,;,,-- r "' � --- ------ . .. . -... ' .... ..... - . . . · - .. '!. ' Fig. 3. PI control : Ei��;·���r---==�==�·-==--- llUf Ci\llDf ... 1 �11 U�Ull•TOll WIUI Rllf IOIP N- Fig. 2. " "-- - - ------- - -- --·. Ii� P e: . > 71� = ����....... " Fig. 4. , .. .............. ...... ... � ...... 31 ,.. 1Z5 .... '' II)� : Fig. 5. LQG Self-tuning Copyright © IFAC Adaptive Systems in Control and Signal Processing, Glasgow, UK, 1 989 IMPROVEMENT OF THE TRACKING PROPERTY FOR THE LINEAR QUADRATIC ADAPTIVE CONTROLLER T.

For m = 5 - 10, this results in only a small degradation of the adaptation tran­ sient when the system dynamics changes. (It has recently been shown by Shimkin and Feuer (1988) that it can in fact be advantageous to update the regulator infrequently. ) Example 1 Let (1/1 - q-1) v (t) be a square wave disturbance with unit amplitude and period 60. 9q-1 and Hu = 1 - q-1, while e(t) = 0. 05q-1 at time 300. 5 and A = 1 - q-1, with F = 1, i. e. no integration. 98 is used. After an initial open loop identification period of 20 samples, the ( ) regulator quickly converges.

7 shows the accumulated loaa divided by time, when SPM, standard MUSMAR (T = 3) and MUSMAR-oo are used. Although both MUSMAR-oo and SPM should yield the infinite horilon LQS feedback ""'"' m«kl m4Ul&ing con­ tlitiona, due to the presence of unmodelled dynamics, SPM presents a big detuning. MUSMAR-oo, instead, being baaed on a multipredictor mode� is inaensmve to plant unmod­ elled dynamics. 8, GPC is not able to yield a 1iabilising feedback in this cue. T References [ll [21 [31 Wittenmark, B. and P.

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