[51] D. Kwak, J. H. Kim*, and T. Hagiwara, "A new quasi-finite-rank approximation of compression operators with application to the L1  discritization for sampled-data systems",  Conference on Decision and Control, pp. 8806--8811, Singapore, Dec. 13--15, 2023.  

https://doi.org/10.1109/CDC49753.2023.10383268

[50] T. Hagiwara*, T. Yuyama, and J. H. Kim, "L∞/L2  Hankel norm analysis and characterization of critical instants for continuous-time linear periodically time-varying systems",  Conference on Decision and Control, pp. 8757--8762, Singapore, Dec. 13--15, 2023.  

https://doi.org/10.1109/CDC49753.2023.10384284

[49] D. Kwak, J. H. Kim*, and T. Hagiwara, "Generalized fast-hold approximation approach to sampled-data L1  synthesis", IFAC World Congress, accepted for presentation, Yokohama, Japan, Jul. 9--14, 2023.  


[48] J. Kim, D. Kwak, and J. H. Kim*, "An H∞  robust consensus control for distributed multi-agent systems characterized by uncertain time-varying topologies",  International Conference on Control, Automation and Systems, pp. 458--460, Yeosu, Republic of Korea, Oct. 17-- Oct.  20, 2023.


[47] H. T. Choi, and J. H. Kim*, "On set-invariance for nonlinear output-feedback control systems: A modified control barrier function",  International Conference on Control, Automation and Systems, pp. 66--69, Yeosu, Republic of Korea, Oct. 17-- Oct.  20, 2023.


[46] T. Kim, and J. H. Kim*, "Generalized H2 optimal disturbance observer for linear time-invariant systems ",  International Conference on Control, Automation and Systems, pp. 1--5, Yeosu, Republic of Korea, Oct. 17-- Oct.  20, 2023.


[45] H. Y. Park, and J. H. Kim*, "A new robust control framework for robot manipulators without velocity measurements: A modified dual-loop control scheme," IEEE International Conference on Robotics and Automation, pp. 12296--12301, London, UK, May. 29 -- Jun. 2, 2023.  

https://doi.org/10.1109/ICRA48891.2023.10160485

[35] H. T. Choi, and  J. H. Kim*, "Invariance domain for the  L1  performance of nonlinear systems", International Conference on Control, Automation and Systems, pp.1194--1198, Jeju, Republic of Korea,  Oct. 12--15, 2021.

https://doi.org/10.23919/ICCAS52745.2021.9650046

[34]  O. R. Kang, and J. H. Kim*, "A new approach to sliding mode control of a robot system with its computed torque treatment," International Conference on Control, Automation and System, pp.1064--1068, Jeju, Republic of Korea, Oct. 12--15, 2021.

https://doi.org/10.23919/ICCAS52745.2021.9649869


[33] H. Y. Park, and J. H. Kim*, "On the  l1 optimal state estimator with application to bipedal robots," IEEE International Conference on Robot and Human Interactive Communication, pp. 792--797, Vancouver, BC, Canada, Aug. 8--12,  2021.

https://doi.org/10.1109/RO-MAN50785.2021.9515320


[32]  D. Kwak, and J. H. Kim*, "A study on the  L1 robust stability analysis of sampled-data systems," European Control Conference, pp. 189--191, Rotterdam, Netherlands, Jun. 29--Jul. 2, 2021.

[30]  G. Park, J. H. Kim, and Y. Oh*, "Towards fully reactive multi-step generation for humanoids against instantaneous push: a case of walking in place in sagittal plane," IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society, pp. 577--582, Lisbon, Portugal, Oct. 14--17, 2019.

https://doi.org/10.1109/IECON.2019.8927726

[29]  J. H. Kim* and T. Hagiwara,  "Generalization framework for gridding approximation approach to yet another  H2 norm of sampled-data systems,"  Proc. 58th IEEE Conference on Decision and Control, pp. 201--206, Nice, France, December 11--13, 2019.

https://doi.org/10.1109/CDC40024.2019.9029199 

[28]  J. H. Kim and T. Hagiwara*,  "Generalization of piecewise constant approximation in the L∞/L2 optimal control of sampled-data systems,"  Proc. European Control Conference, pp. 2839--2844, Naples, Italy, June 25--29, 2019.

https://doi.org/10.23919/ECC.2019.8796105

[27]  J. H. Kim* and T. Hagiwara,  "A study on the optimal controller synthesis for minimizing the L2 norm of the response to the worst-timing impulse disturbance in LTI sampled-data systems"  Proc. 57th  IEEE  Conference on Decision and Control, pp. 6626-6631, Miami Beach, FL, USA, December 17--19, 2018. 

https://doi.org/10.1109/CDC.2018.8619492

[26]  M. Kim, J. H. Kim, S. Kim and J. Park*,  "Disturbance observer based linear feedback controller for compliant motion of humanoid robot,"  Proc. 2018  IEEE  International Conference on Robotics and Automation, pp. 403--410, Brisbane, Australia, May 21--25, 2018. 

https://doi.org/10.1109/ICRA.2018.8460618

[25]  J. H. Kim*, S.-m. Hur and Y. Oh,  "L1 robustness of computed torque method for robotic manipulators,"  Proc. 2018  IEEE International Conference on Robotics and Automation, pp. 330--335, Brisbane, Australia, May 21--25, 2018.

https://doi.org/10.1109/ICRA.2018.8461170

[24]  J. H. Kim*, S.-m. Hur and Y. Oh,  "A study on the  L∞/L2 performance of a computed torque controller,"  Proc. 19th  IEEE International Conference on Industrial Technology, pp. 35--39, Lyon, France, February 20--22, 2018.

https://doi.org/10.1109/ICIT.2018.8352148

[23]  J. H. Kim* and T. Hagiwara,  "A discretization approach to the analysis of yet another H2 norm of LTI sampled-data systems,"  Proc. 56th  IEEE Conference on Decision and Control, pp. 3594--3599, Melbourne, Australia, December 12--15, 2017.

https://doi.org/10.1109/CDC.2017.8264187

[22]  J. H. Kim* and J.-H. Park,  "A study on the  l1 analysis of discrete-time systems,"  Proc. 17th  International Conference  on Control, Automation and Systems, pp. 437--441, Jeju, Republic of Korea, October 18--21, 2017.

https://doi.org/10.23919/ICCAS.2017.8204479

[21]  J. Lee, J. H. Kim and Y. Oh*,  "A method for robust robotic bipedal walking on rough terrain: l1-optimal event-based feedback controller,"  Proc. 2017 IEEE/RSJ  International Conference on Intelligent Robots and Systems, pp. 1443--1448, Vancouver,  BC, Canada, September 24--28, 2017.

https://doi.org/10.1109/IROS.2017.8205946

[20]  A. Inai*, T. Hagiwara and  J. H. Kim, "Characterization of quasi L∞/L2 Hankel norms of sampled-data systems,"  IFAC-PapersOnLine Special Issue: 20th IFAC World  Congress, Vol. 50, No. 1, pp. 3623--3628, Toulouse, France, July 9--14, 2017. 

https://doi.org/10.1016/j.ifacol.2017.08.707

[19]  J. H. Kim* and T. Hagiwara,  "Kernel approximation approach  to the L1 optimal sampled-data controller synthesis problem,"  IFAC-PapersOnLine Special Issue: 20th IFAC World Congress, Vol. 50, No. 1, pp. 910--915, Toulouse, France, July 9--14, 2017.

https://doi.org/10.1016/j.ifacol.2017.08.086

[18]  J. H. Kim, J. Lee and Y. Oh*,  "Stability regions for standing balance of biped humanoid robots,"  Proc. 2017 IEEE  International Conference on Robotics and Automation, pp. 4735--4740, Singapore, May 29--June 3, 2017.

https://doi.org/10.1109/ICRA.2017.7989549

[17]  J. H. Kim, S.-m. Hur and Y. Oh*,  "Maximum tracking errors in PD-controlled robotic manipulators,"  Proc. 2016 IEEE/SICE International Symposum on System Integration, pp. 676--681, Sapporo, Japan, December 13--15, 2016.

https://dx.doi.org/10.1109/SII.2016.7844077

[16]  J. H. Kim and T. Hagiwara*,  "A study on discretization approach to the L∞/L2 optimal controller synthesis problem in sampled-data systems,"  Proc. 55th IEEE Conference on Decision and Control, pp. 4021--4026, Las Vegas, USA, December 12--14, 2016.

https://dx.doi.org/10.1109/CDC.2016.7798878

[15]  T. Hagiwara*, A. Inai and J. H. Kim   "The L∞/L2 hankel norm of sampled-data systems,"  Proc. 55th IEEE Conference on  Decision and  Control, pp. 4009--4014, Las Vegas, USA, December 12--14, 2016.

https://dx.doi.org/10.1109/CDC.2016.7798876

[14]  J. Lee,  J. H. Kim and Y. Oh*,  "A novel performance measure for biped robots against bounded persistent disturbances,"  Proc. 2016  IEEE/RSJ International Conference on Intelligent Robots and Systems, pp. 5805--5812,  Daejeon, Republic of Korea, October 9--14, 2016.  

http://dx.doi.org/10.1109/IROS.2016.7759854

[13]  J. Lee, G. Lee, S. Hong, S. W. Lee, J. H. Kim and Y. Oh*,  "A novel multi-articular leg mechanism for biped robots inspired by bi-articular muscle,"  Proc. 6th IEEE RAS & EMBS International Conference on Biomedical Robotics and  Biomechatronics,  pp. 1372--1377, UTown,  Singapore, June 26--29, 2016.

http://dx.doi.org/10.1109/BIOROB.2016.7523825

[12]  J. H. Kim, S.-m. Hur, J. Lee and Y. Oh*,  "A study on the L1 optimal PD controller with application to joint motion control of a robot manipulator,"  Proc. 2016 IEEE International Conference on Robotics and Automation, pp. 5696--5701,  Stockholm,  Sweden, May 16--21, 2016.

http://dx.doi.org/10.1109/ICRA.2016.7487792

[11]  J. H. Kim* and T. Hagiwara,  "Computation of the induced norm from L2 to L∞ in  SISO sampled-data systems: discretization approach with convergence rate analysis,"  Proc. 54th IEEE Conference on Decision and Control, pp. 1750--1755, Osaka, Japan, December 15--18, 2015. 

http://dx.doi.org/10.1109/CDC.2015.7402463

[10]  Y. W. Choi*,  J. H. Kim and T. Hagiwara,  "L1 analysis of LTI systems via piecewise higher-order approximation,"  Proc. 2015 IEEE Multi-Conference on Systems and Control, pp. 1410--1415, Sydney, Australia, September 21--23, 2015. 

http://dx.doi.org/10.1109/CCA.2015.7320809

[9]  J. H. Kim and T. Hagiwara*,  "Kernel approximation approach to the L1 analysis of sampled-data systems,"  Proc. European Control Conference 2015, pp. 416--421, Linz, Austria, July 15--17, 2015. 

http://dx.doi.org/10.1109/ECC.2015.7330579

[8]  J. H. Kim and T. Hagiwara*,  "Induced norm from L2 to L∞ in SISO sampled-data systems,"  Proc. 2015 American Control Conference,  pp. 2862--2867, Chicago, IL, USA, July 1--3, 2015. 

http://dx.doi.org/10.1109/ACC.2015.7171169

[7]  J. H. Kim* and T. Hagiwara, "Computing the L∞-induced norm of LTI systems,"  Proc. 53rd IEEE Conference on Decision and Control, pp. 2404--2409, Los Angeles, California, USA, December 15--17, 2014.

http://dx.doi.org/10.1109/CDC.2014.7039755

[6]  J. H. Kim* and T. Hagiwara, "Characterization of the induced norms from L2 to L∞ and from l2 to  l∞ and their computations,"  Proc. SICE  Annual Conference 2014, pp. 636--641, Sapporo, Japan, September 9--12, 2014.

[5]  J. H. Kim* and T. Hagiwara, "A study on piecewise linear approximation in the L1 optimal control problem of sampled-data  systems," Proc.  21st International Symposium on Mathematical Theory of Networks and Systems, pp. 215--222, Groningen, The Netherlands, July 7--11, 2014. 

http://fwn06.housing.rug.nl/mtns2014-papers/fullPapers/0122.pdf

[4]  J. H. Kim* and T. Hagiwara, "L1 analysis of sampled-data systems via fast-lifting and piecewise linear approximation," Proc. 52nd IEEE  Conference on Decision and Control, pp. 4730--4735, Florence, Italy, December 10--13, 2013.

http://dx.doi.org/10.1109/CDC.2013.6760630

[3]  J. H. Kim* and T. Hagiwara, "Computing the L∞[0,h)-induced norm of a compression operator,"  Proc. European Control Conference 2013,  pp. 3688--3693, Zurich, Switzerland, July 17--19, 2013. 

http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6669195

[2]  J. H. Kim*, T. Hagiwara and K. Hirata,  "A study on the spectrum of monodromy operator for a time-delay system," Proc. Asian Control Conference 2013, 6pages (no pagination), Istanbul, Turkey, June 23--26, 2013.

http://dx.doi.org/10.1109/ASCC.2013.6606024

[1]  J. H. Kim* and T. Hagiwara, "Quasi-finite-rank approximation of compression operators based on L∞ [0,h]-induced norm,"  Proc. SICE  Annual Conference 2012, pp. 2238--2243, Akita, Japan, August 20--23, 2012.

http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6318387&tag=1