Murray Wiki - User contributions [en]

Ian Manchester, Jan 2012

2012-01-25T17:39:26Z

Nali:

Ian Manchester will visit CDS on 25 Jan 2012 (Wed). If you would like to meet with him, please sign up below.

* 12:30pm-2:00pm: Lunch and discussion; please sign up here if you want to join the lunch
meet at west gate of second floor @ Annenberg, outside classroom 213
* 2:00-3:00pm: Talk @ CDS library
* 3:00-3:30: Necmiye (maybe chat @ CDS tea)
* 3:30-4:00: Dom
* 4:00-4:30: Eric + Ufuk
* 4:30-5:00: open
* 5:00-5:30: open

<hr>

<center>
Identification and Analysis of Nonlinear Oscillations via
Convex Relaxation

'''Ian Machester''' 
MIT
</center>
Abstract: Stable and self-sustained oscillations (aka limit cycles) are an
intriguing dynamical phenomenon: they are ubiquitous in natural and
engineered systems; they are the second thing anyone looks for (after
equilibria) when analyzing a dynamic system; and yet they cause great
difficulty for many familiar concepts from systems and control. Stable
oscillation is an inherently nonlinear phenomenon. Trajectories live
on the "edge of stability", i.e. they always have one critically
stable Lyapunov exponent and cannot be asymptotically stable in the
usual sense. Their regions of attraction can never be all of R^n but
are always "donut shaped".

This talk will cover some recent work on control, analysis, and
identification for systems with limit cycles. We will derive
computationally tractable methods using transverse coordinates, convex
relaxations, and semidefinite/sum-of-squares programming. The main
examples covered will be region-of-stability analysis for an
underactuated walking robot, and black-box system identification of
live neurons in culture.

=== Biography ===

Ian Manchester received the BE and PhD degrees in Electrical Engineering from the University of New South Wales, Sydney. He was then a post-doc and guest lecturer at Umeå University, Sweden. He is presently a Research Scientist with the Robot Locomotion Group, Massachusetts Institute of Technology. For the last 2 yrs he was working with Alex Megretski and Russ Tedrake, mostly on convex optimization algorithms for nonlinear system identification and analysis. A particular focus has been identifying and analyzing systems with autonomous oscillations (limit cycles) including live neurons in culture, and walking robots.

Ian Manchester, Jan 2012

2012-01-25T05:26:58Z

Nali: /* Biography */

Ian Manchester will visit CDS on 25 Jan 2012 (Wed). If you would like to meet with him, please sign up below.

* 12:30pm-2:00pm: Lunch and discussion; please sign up here if you want to join the lunch
meet at west gate of second floor @ Annenberg, outside classroom 213
* 2:00-3:00pm: Talk; place: TBA
* 3:00-3:30: Necmiye (maybe chat @ CDS tea)
* 3:30-4:00: open
* 4:00-4:30: open
* 4:30-5:00: open
* 5:00-5:30: open

<hr>

<center>
Identification and Analysis of Nonlinear Oscillations via
Convex Relaxation

'''Ian Machester''' 
MIT
</center>
Abstract: Stable and self-sustained oscillations (aka limit cycles) are an
intriguing dynamical phenomenon: they are ubiquitous in natural and
engineered systems; they are the second thing anyone looks for (after
equilibria) when analyzing a dynamic system; and yet they cause great
difficulty for many familiar concepts from systems and control. Stable
oscillation is an inherently nonlinear phenomenon. Trajectories live
on the "edge of stability", i.e. they always have one critically
stable Lyapunov exponent and cannot be asymptotically stable in the
usual sense. Their regions of attraction can never be all of R^n but
are always "donut shaped".

This talk will cover some recent work on control, analysis, and
identification for systems with limit cycles. We will derive
computationally tractable methods using transverse coordinates, convex
relaxations, and semidefinite/sum-of-squares programming. The main
examples covered will be region-of-stability analysis for an
underactuated walking robot, and black-box system identification of
live neurons in culture.

=== Biography ===

Ian Manchester received the BE and PhD degrees in Electrical Engineering from the University of New South Wales, Sydney. He was then a post-doc and guest lecturer at Umeå University, Sweden. He is presently a Research Scientist with the Robot Locomotion Group, Massachusetts Institute of Technology. For the last 2 yrs he was working with Alex Megretski and Russ Tedrake, mostly on convex optimization algorithms for nonlinear system identification and analysis. A particular focus has been identifying and analyzing systems with autonomous oscillations (limit cycles) including live neurons in culture, and walking robots.

Ian Manchester, Jan 2012

2012-01-25T05:26:33Z

Nali:

Ian Manchester will visit CDS on 25 Jan 2012 (Wed). If you would like to meet with him, please sign up below.

* 12:30pm-2:00pm: Lunch and discussion; please sign up here if you want to join the lunch
meet at west gate of second floor @ Annenberg, outside classroom 213
* 2:00-3:00pm: Talk; place: TBA
* 3:00-3:30: Necmiye (maybe chat @ CDS tea)
* 3:30-4:00: open
* 4:00-4:30: open
* 4:30-5:00: open
* 5:00-5:30: open

<hr>

<center>
Identification and Analysis of Nonlinear Oscillations via
Convex Relaxation

'''Ian Machester''' 
MIT
</center>
Abstract: Stable and self-sustained oscillations (aka limit cycles) are an
intriguing dynamical phenomenon: they are ubiquitous in natural and
engineered systems; they are the second thing anyone looks for (after
equilibria) when analyzing a dynamic system; and yet they cause great
difficulty for many familiar concepts from systems and control. Stable
oscillation is an inherently nonlinear phenomenon. Trajectories live
on the "edge of stability", i.e. they always have one critically
stable Lyapunov exponent and cannot be asymptotically stable in the
usual sense. Their regions of attraction can never be all of R^n but
are always "donut shaped".

This talk will cover some recent work on control, analysis, and
identification for systems with limit cycles. We will derive
computationally tractable methods using transverse coordinates, convex
relaxations, and semidefinite/sum-of-squares programming. The main
examples covered will be region-of-stability analysis for an
underactuated walking robot, and black-box system identification of
live neurons in culture.

=== Biography ===

Ian Manchester received the BE (Hons 1) and PhD degrees in Electrical Engineering from the University of New South Wales, Sydney. He was then a post-doc and guest lecturer at Umeå University, Sweden. He is presently a Research Scientist with the Robot Locomotion Group, Massachusetts Institute of Technology. For the last 2 yrs he was working with Alex Megretski and Russ Tedrake, mostly on convex optimization algorithms for nonlinear system identification and analysis. A particular focus has been identifying and analyzing systems with autonomous oscillations (limit cycles) including live neurons in culture, and walking robots.

Ian Manchester, Jan 2012

2012-01-25T02:41:16Z

Nali:

Ian Manchester will visit CDS on 25 Jan 2012 (Wed). If you would like to meet with her, please sign up below.

* 12:30pm-2:00pm: Lunch and discussion; please sign up here if you want to join the lunch
meet at west gate of second floor @ Annenberg, outside classroom 213
* 2:00-3:00pm: Talk; place: TBA
* 3:00-3:30: open
* 3:30-4:00: open
* 4:00-4:30: open
* 4:30-5:00: open
* 5:00-5:30: open

<hr>

<center>


'''Ian Machester''' 
MIT
</center>
Title: TBA

Abstract: TBA

=== Biography ===

Ian Manchester received the BE (Hons 1) and PhD degrees in Electrical Engineering from the University of New South Wales, Sydney. He was then a post-doc and guest lecturer at Umeå University, Sweden. He is presently a Research Scientist with the Robot Locomotion Group, Massachusetts Institute of Technology. For the last 2 yrs he was working with Alex Megretski and Russ Tedrake, mostly on convex optimization algorithms for nonlinear system identification and analysis. A particular focus has been identifying and analyzing systems with autonomous oscillations (limit cycles) including live neurons in culture, and walking robots.

Ian Manchester, Jan 2012

2012-01-25T02:41:00Z

Nali:

Ian Manchester will visit CDS on 25 Jan 2012 (Wed). If you would like to meet with her, please sign up below.

* 12:30pm-2:00pm: Lunch and discussion; please sign up here if you want to join the lunch
* meet at west gate of second floor @ Annenberg, outside classroom 213
* 2:00-3:00pm: Talk; place: TBA
* 3:00-3:30: open
* 3:30-4:00: open
* 4:00-4:30: open
* 4:30-5:00: open
* 5:00-5:30: open

<hr>

<center>


'''Ian Machester''' 
MIT
</center>
Title: TBA

Abstract: TBA

=== Biography ===

Ian Manchester received the BE (Hons 1) and PhD degrees in Electrical Engineering from the University of New South Wales, Sydney. He was then a post-doc and guest lecturer at Umeå University, Sweden. He is presently a Research Scientist with the Robot Locomotion Group, Massachusetts Institute of Technology. For the last 2 yrs he was working with Alex Megretski and Russ Tedrake, mostly on convex optimization algorithms for nonlinear system identification and analysis. A particular focus has been identifying and analyzing systems with autonomous oscillations (limit cycles) including live neurons in culture, and walking robots.

Ian Manchester, Jan 2012

2012-01-25T02:40:42Z

Nali:

Ian Manchester, Jan 2012

2012-01-25T02:40:09Z

Nali:

Ian Manchester will visit CDS on 25 Jan 2012 (Wed). If you would like to meet with her, please sign up below.

* 12:30pm-2:00pm: Lunch and discussion; please sign up here if you want to join the lunch
(meet at west gate of second floor @ Annenberg, outside classroom 213)
* 2:00-3:00pm: Talk; place: TBA
* 3:00-3:30: open
* 3:30-4:00: open
* 4:00-4:30: open
* 4:30-5:00: open
* 5:00-5:30: open

<hr>

<center>


'''Ian Machester''' 
MIT
</center>
Title: TBA

Abstract: TBA

=== Biography ===

Ian Manchester received the BE (Hons 1) and PhD degrees in Electrical Engineering from the University of New South Wales, Sydney. He was then a post-doc and guest lecturer at Umeå University, Sweden. He is presently a Research Scientist with the Robot Locomotion Group, Massachusetts Institute of Technology. For the last 2 yrs he was working with Alex Megretski and Russ Tedrake, mostly on convex optimization algorithms for nonlinear system identification and analysis. A particular focus has been identifying and analyzing systems with autonomous oscillations (limit cycles) including live neurons in culture, and walking robots.

Ian Manchester, Jan 2012

2012-01-25T02:37:12Z

Nali:

Ian Manchester will visit CDS on 25 Jan 2012 (Wed). If you would like to meet with her, please sign up below.

* 12:30pm-2:00pm:Lunch and discussion; please sign up here if you want to join the lunch
* 2:00-3:00pm: Talk; place: TBA
* 3:00-3:30: open
* 3:30-4:00: open
* 4:00-4:30: open
* 4:30-5:00: open
* 5:00-5:30: open

<hr>

<center>


'''Ian Machester''' 
MIT
</center>
Title: TBA

Abstract: TBA

=== Biography ===

Ian Manchester received the BE (Hons 1) and PhD degrees in Electrical Engineering from the University of New South Wales, Sydney. He was then a post-doc and guest lecturer at Umeå University, Sweden. He is presently a Research Scientist with the Robot Locomotion Group, Massachusetts Institute of Technology. For the last 2 yrs he was working with Alex Megretski and Russ Tedrake, mostly on convex optimization algorithms for nonlinear system identification and analysis. A particular focus has been identifying and analyzing systems with autonomous oscillations (limit cycles) including live neurons in culture, and walking robots.

Ian Manchester, Jan 2012

2012-01-25T02:36:47Z

Nali:

Ian Manchester will visit CDS on 25 Jan 2012 (Wed). If you would like to meet with her, please sign up below.

* 12:30pm-2:00pm:Lunch and discussion; please sign up here if you want to join the lunch
* 2:00-3:00pm: Talk; place: TBA
* 3:00-3:30: open
* 3:30-4:00: open
* 4:00-4:30: open
* 4:30-5:00: open
* 5:00-5:30: open

<hr>

<center>


'''Ian Machester''' 
MIT
</center>
Title: TBA
Abstract: TBA

=== Biography ===

Ian Manchester received the BE (Hons 1) and PhD degrees in Electrical Engineering from the University of New South Wales, Sydney. He was then a post-doc and guest lecturer at Umeå University, Sweden. He is presently a Research Scientist with the Robot Locomotion Group, Massachusetts Institute of Technology. For the last 2 yrs he was working with Alex Megretski and Russ Tedrake, mostly on convex optimization algorithms for nonlinear system identification and analysis. A particular focus has been identifying and analyzing systems with autonomous oscillations (limit cycles) including live neurons in culture, and walking robots.

Ian Manchester, Jan 2012

2012-01-24T21:11:45Z

Nali:

Naira Hovakimyan will visit CDS on 16 Jan 2012 (Thu). If you would like to meet with her, please sign up below.

* 10:30:
* 11:00:
* 12:00:
* 1:30:
* 2:00:
* 2:30:
* 3:00:
* 3:30:
* 4:00:

<hr>

<center>


'''Ian Machester''' 
MIT
</center>

Abstract:

=== Biography ===

Ian Manchester received the BE (Hons 1) and PhD degrees in Electrical Engineering from the University of New South Wales, Sydney. He was then a post-doc and guest lecturer at Umeå University, Sweden. He is presently a Research Scientist with the Robot Locomotion Group, Massachusetts Institute of Technology. For the last 2 yrs he was working with Alex Megretski and Russ Tedrake, mostly on convex optimization algorithms for nonlinear system identification and analysis. A particular focus has been identifying and analyzing systems with autonomous oscillations (limit cycles) including live neurons in culture, and walking robots.

Ian Manchester, Jan 2012

2012-01-24T21:11:12Z

Nali: Created page with 'Naira Hovakimyan will visit CDS on 16 Jan 2012 (Thu). If you would like to meet with her, please sign up below. * 10:30: * 11:00: * 12:00: * 1:30: * 2:00: * 2:30: * 3:00:…'

Naira Hovakimyan will visit CDS on 16 Jan 2012 (Thu). If you would like to meet with her, please sign up below.

* 10:30:
* 11:00:
* 12:00:
* 1:30:
* 2:00:
* 2:30:
* 3:00:
* 3:30:
* 4:00:

<hr>

<center>


'''Ian Machester''' 
UIUC
</center>

Abstract:

=== Biography ===

Ian Manchester received the BE (Hons 1) and PhD degrees in Electrical Engineering from the University of New South Wales, Sydney. He was then a post-doc and guest lecturer at Umeå University, Sweden. He is presently a Research Scientist with the Robot Locomotion Group, Massachusetts Institute of Technology. For the last 2 yrs he was working with Alex Megretski and Russ Tedrake, mostly on convex optimization algorithms for nonlinear system identification and analysis. A particular focus has been identifying and analyzing systems with autonomous oscillations (limit cycles) including live neurons in culture, and walking robots.