ME, myself & UCSB. Mihailo Jovanović mihailo. 50th Anniversary Celebration, UCSB Mechanical Engineering

Transcription

1 ME, myself & UCSB Mihailo Jovanović mihailo 50th Anniversary Celebration, UCSB Mechanical Engineering

2 Modeling, dynamics, and control of distributed systems theory and applications methods for uncertainty propagation, analysis, and design networks of dynamic systems fluid flows Research topics 1

3 September 1998 raft Timeline arrived at UCSB (along with 6 others from former Yugoslavia) June 2004 graduation September - December 2004 KTH, Stockholm, Sweden December present Univ. of Minnesota, Twin Cities 2

4 September 1998 raft Timeline arrived at UCSB (along with 6 others from former Yugoslavia) June 2004 graduation September - December 2004 KTH, Stockholm, Sweden December present Univ. of Minnesota, Twin Cities 2 with Yugoslav gang; Oct. 2001

5 First couple of years at UCSB 3

6 Choice of the advisor raft influences the rest of your career better find somebody you enjoy interacting with The most important decision in grad school 4

7 Choice of the advisor raft influences the rest of your career better find somebody you enjoy interacting with intellectual breadth quality of interactions The most important decision in grad school 4 exciting research

8 Bassam and shark-skin 5 BASSAM S IDEA: use system s theory to design drag-reducing surfaces

9 Mentorship ;-) 6 Halloween 2000 (at Brad Paden s)

10 Japanese Advanced Meteorological Imager temperature across telescope influences optical performance passive design fails to meet requirements necessity for feedback control Summer 2001: Internship at Raytheon 7 image credit: Raytheon

11 Japanese Advanced Meteorological Imager temperature across telescope influences optical performance passive design fails to meet requirements necessity for feedback control Configuration three heaters (actuators) three temperature sensors Summer 2001: Internship at Raytheon 7 Contributions control-oriented modeling control design image credit: Raytheon validation and verification

12 Lessons learned raft non-empty bank account makes Santa Barbara way more enjoyable ;-) UCSB classes are actually useful ;-) 8

13 Lessons learned raft non-empty bank account makes Santa Barbara way more enjoyable ;-) UCSB classes are actually useful ;-) witnessed value of research 8

14 Experimental onset of turbulence much before instability depends on experimental conditions Transition to turbulence 9

15 DYNAMICS AND CONTROL OF SHEAR FLOWS The early stages of transition initiated by high flow sensitivity Controlling the onset of turbulence simulation-free design for reducing sensitivity Key issue: high flow sensitivity Part 2: Fluids 10

16 DYNAMICS AND CONTROL OF SHEAR FLOWS The early stages of transition initiated by high flow sensitivity Controlling the onset of turbulence simulation-free design for reducing sensitivity Key issue: high flow sensitivity Part 2: Fluids 10 J. Fluid Mech. (2005), vol. 534, pp c 2005 Cambridge University Press doi: /s Printed in the United Kingdom 145 Componentwise energy amplification in channel flows By MIHAILO R. JOVANOVIĆ 1 AND BASSAM BAMIEH 2 1 Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455, USA 2 Department of Mechanical Engineering, University of California, Santa Barbara, CA , USA (Received 21 February 2004 and in revised form 28 November 2004)

17 Controlling the onset of turbulence by streamwise travelling waves. Part 1. Receptivity analysis RASHAD MOARREF AND MIHAILO R. JOVANOVIĆ Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455, USA (Received 29 October 2009; revised 22 June 2010; accepted 23 June 2010; first published online 8 September 2010) We examine the efficacy of streamwise travelling waves generated by a zero-netmass-flux J. Fluid Mech. surface (2010), vol. blowing 663, pp and suction c Cambridge for controlling University Press the 2010 onset of turbulence in a channel doi: /s x flow. For small-amplitude actuation, we utilize a weakly nonlinear analysis to determine base-flow modifications and assess the resulting net power balance. Receptivity analysis of the velocity fluctuations around this base flow is then employed to design thecontrolling travelling waves. Our the simulation-free onset of approach turbulence reveals that, relative to the flow with no bycontrol, streamwise the downstream travelling waves waves. with properly designed speed and frequency can significantly reduce receptivity, which makes them well suited for controlling Part 2. the Direct onset of turbulence. numerical In contrast, simulation the velocity fluctuations around the upstream travelling waves exhibit larger receptivity to disturbances. Our theoretical predictions, BINHobtained K. LIEU, by perturbation RASHADanalysis MOARREF (in the wave amplitude) of the linearized Navier Stokes AND MIHAILO equations R. with JOVANOVIĆ spatially periodic coefficients, are verified using Department full-scale of Electrical simulations and Computer of the nonlinear Engineering, flow University dynamics of Minnesota, the companion paper (Lieu et al., J. Fluid Mech., Minneapolis, 2010, doi: /s x). MN 55455, USA SENSOR-FREE FLOW CONTROL 11 J. Fluid Mech. (2010), vol. 663, pp c Cambridge University Press 2010 doi: /s Key words: (Received boundary-layer 29 October receptivity, 2009; revised flow 22 June control, 2010; transition accepted 23 to June turbulence 2010; first published online 8 September 2010) This study builds on and confirms the theoretical findings of Part 1 of this paper

18 All good things must come to an end with Bassam & Aleksandra; Commencement, June 2004

19 UCSB connections raft Makan Fardad Florian Dörfler Murat Arcak Bassam From SB to Minneapolis via Stockholm... 13

20 Fellow Santa Barbarian Bassam s graduate student raft PhD thesis on spatially-periodic systems spent two years in Minneapolis, faculty at Syracuse University, present Joint work Collaboration with Makan 14 input-output norms of PDEs with periodic coefficients (at UCSB) structured feedback synthesis sparsity-promoting optimal control joint NSF grant; 8 journal and 21 conference papers

21 WIDE-AREA CONTROL OF POWER NETWORKS remedy against inter-area oscillations Dörfler, Jovanović, Chertkov, Bullo, ACC 13 Dörfler, Jovanović, Chertkov, Bullo, IEEE TPWRS 14 Wu, Dörfler, Jovanović, MTNS 14 Collaborations with Florian and Murat 15 OSCILLATIONS IN BIO-CHEMICAL REACTION NETWORKS Cyclic biochemical networks with inhibitory feedback VANOVIĆ, U OF M 2 conditions for existence of oscillations Cyclic Biochemical Networks with Inhibitory Feedback ELLULAR SIGNALING holodenko Cellular Signaling: Cyclic 00; Shvartsman Biochemical Kholodenko et al. (2000), Networks 01 Shvartsman with Inhibitory et al. (2001), Feedback and others Cellular Signaling: Kinase Kholodenko (2000), Shvartsman et al. (2001), and others Kinase M3 M3 P M2 M2 M3 M3 P Phosphatase P M2 M2 P Phosphatase Phosphatase Phosphatase M1 M1 P M1 M1 P Phosphatase Gene Regulation: Jacob & Monod ( 61), Goodwin ( 65), Elowitz Phosphatase ENE REGULATION & Leibler (2000) Jovanović, Arcak, Sontag, IEEE TAC 08 Shafi, Arcak, Jovanović, Packard, Automatica 13

22 Fundamental performance limitations can local feedback provide robustness to external disturbances? Collaboration with Bassam 16 LARGE DYNAMIC NETWORKS local feedback + relative measurements non-robust traffic networks 2013 George S. Axelby Outstanding Paper Award

23 What makes UCSB great? raft Parting thoughts genuine care about interdisciplinary research porous inter-departmental boundaries outstanding people 17

24 What makes UCSB great? raft Parting thoughts genuine care about interdisciplinary research porous inter-departmental boundaries outstanding people location, location, location laid-back atmosphere 17

25 What makes UCSB great? raft Parting thoughts genuine care about interdisciplinary research porous inter-departmental boundaries outstanding people location, location, location laid-back atmosphere 17 with control gang; Maui, Dec. 2003

26 What makes UCSB great? raft Parting thoughts genuine care about interdisciplinary research porous inter-departmental boundaries outstanding people location, location, location laid-back atmosphere 17 with control gang; Maui, Dec with PK; Alaska, May 2002

27 Hana El-Samad Maria Napoli Sophie Loire Jayati Ghosh UCSF UCSB UCSB & AIMdyn Agilent ME s Best Product 18 Vasu Salapaka Umesh Vaidya Makan Fardad Symeon Grivopoulos UIUC Iowa State Syracuse U. New South Wales

28 Niklas Karlsson Aruna Ranaweera Greg Hagen David Betz VP of R&D AOL Assoc. Director Stryker Manager Pratt & Whitney Systems Engineer Boeing ME s Best Product 19 Thomas John Portfolio Manager BlackRock George Mathew Staff Scientist UTRC

29 ME s Best Product 20 Domenico D Alessandro Professor Iowa State University Murti Salapaka Professor University of Minnesota PhD students of the late Mohammed Dahleh

30 21