# Profile

# Dr Tim Hughes

## Publications

_{Copyright Notice: Any articles made available for download are for personal use only. Any other use requires prior permission of the author and the copyright holder.}

_{Copyright Notice: Any articles made available for download are for personal use only. Any other use requires prior permission of the author and the copyright holder.}

| 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2014 | 2013 |

### 2022

- Alharthi M, Hughes T, Mueller M. (2022) Optimal Control of Volterra Difference Equations of the First Kind,
*2022 13th UKACC International Conference on Control, CONTROL 2022*, pages 171-176, DOI:10.1109/Control55989.2022.9781441. - Hughes TH, Branford EH. (2022) Dissipativity, Reciprocity, and Passive Network Synthesis: From the Seminal Dissipative Dynamical Systems Articles of Jan Willems to The Present Day,
*IEEE Control Systems*, volume 42, no. 3, pages 36-57, DOI:10.1109/mcs.2022.3157135.

### 2021

- Hughes T. (2021) On computing the H2 norm using the polynomial Diophantine equation,
*24th International Symposium on Mathematical Theory of Networks and Systems*, Cambridge, Uk, 23rd - 27th Aug 2021.

### 2020

- Hughes T, Willetts G, Kryczka J. (2020) LQG controller for the LEGO MINDSTORMS EV3 Gyroboy Segway robot,
*20th IFAC World Congress*, Berlin, 13th - 17th Jul 2020,*Proceeding of the 20th IFAC World Congress*, DOI:10.1016/j.ifacol.2020.12.1811. - Branford E, Hughes T. (2020) An assumption-free theorem on discrete-time positive real systems,
*IFAC-PapersOnLine*, volume 53, no. 2, pages 4474-4480, DOI:10.1016/j.ifacol.2020.12.450. - Hughes TH. (2020) Minimal Seriesâ€“Parallel Network Realizations of Bicubic Impedances,
*IEEE Transactions on Automatic Control*, volume 65, no. 12, pages 4997-5011, DOI:10.1109/tac.2020.2968859.

### 2019

- Hughes TH, Morelli A, Smith MC. (2019) On a concept of genericity for RLC networks,
*Systems and Control Letters*, volume 134, DOI:10.1016/j.sysconle.2019.104562. - Hughes TH. (2019) On reciprocal systems and controllability,
*Automatica*, volume 101, pages 396-408, DOI:10.1016/j.automatica.2018.12.021.

### 2018

- Hughes TH. (2018) On the internal signature and minimal electric network realizations of reciprocal behaviors,
*Systems and Control Letters*, volume 119, pages 16-22, DOI:10.1016/j.sysconle.2018.06.007. - Hughes TH. (2018) On the Optimal Control of Passive or Nonexpansive Systems,
*IEEE Transactions on Automatic Control*, volume 63, no. 12, pages 4079-4093, DOI:10.1109/TAC.2018.2819656.

### 2017

- Hughes TH. (2017) Passivity and electric circuits: a behavioral approach, DOI:10.1016/j.ifacol.2017.08.2117.
- Hughes TH, Smith MC. (2017) Controllability of linear passive network behaviors,
*Systems and Control Letters*, volume 101, pages 58-66, DOI:10.1016/j.sysconle.2015.09.011. - Hughes TH. (2017) Controllability of passive single-input single-output systems,
*2016 European Control Conference, ECC 2016*, pages 1087-1092, DOI:10.1109/ECC.2016.7810434. - Hughes TH. (2017) Why RLC Realizations of Certain Impedances Need Many More Energy Storage Elements Than Expected,
*IEEE Transactions on Automatic Control*, volume 62, no. 9, pages 4333-4346, DOI:10.1109/TAC.2017.2667585. - Hughes TH. (2017) A theory of passive linear systems with no assumptions,
*Automatica*, volume 86, pages 87-97, DOI:10.1016/j.automatica.2017.08.017.

### 2016

- Hughes TH. (2016) Behavioral realizations using companion matrices and the smith form,
*SIAM Journal on Control and Optimization*, volume 54, no. 2, pages 845-865, DOI:10.1137/140991911.

### 2014

- Hughes TH. (2014) On the Synthesis of Passive Networks without Transformers. [PDF]
- Smith MC, Hughes TH, Jiang JZ. (2014) A Survey of Classical and Recent Results in RLC Circuit Synthesis,
*21st International Symposium on Mathematical Theory of Networks and Systems*, Groningen, The Netherlands, 7th - 11th Jul 2014,*http://fwn06.housing.rug.nl/mtns2014-papers/extendedAbstracts/0127.pdf*, pages 1119-1120. - Hughes TH, Smith MC. (2014) Questions of minimality in RLC circuit synthesis,
*21st International Symposium on Mathematical Theory of Networks and Systems*, Groningen, The Netherlands, 7th - 11th Jul 2014,*http://fwn06.housing.rug.nl/mtns2014-papers/extendedAbstracts/0121.pdf*, pages 1558-1561. - Hughes TH. (2014) On Connections between the Cauchy Index, the Sylvester Matrix, Continued Fraction Expansions, and Circuit Synthesis,
*21st International Symposium on Mathematical Theory of Networks and Systems*, Groningen, The Netherlands, 7th - 11th Jul 2014,*http://fwn06.housing.rug.nl/mtns2014-papers/fullPapers/0060.pdf*, pages 1121-1128. - Hughes TH, Smith MC. (2014) On the minimality and uniqueness of the bott-duffin realization procedure,
*IEEE Transactions on Automatic Control*, volume 59, no. 7, pages 1858-1873, DOI:10.1109/TAC.2014.2312471.

### 2013

- Hughes TH, Smith MC. (2013) Algebraic criteria for circuit realisations,
*Mathematical System Theory - Festschrift in Honor of Uwe Helmke on the Occasion of his Sixtieth Birthday*, CreateSpace, 211-228.

Showing 22 publications from Symplectic.