Unified form of performance limitations in reference tracking control problem for discrete time systems. - Hiroshi Okajima; Toru Asai; Shigeyasu Kawaji (CDC, 2009)

An Implementation of Fractional-order PID Controller with Dynamic Quantizer Considering the Memory Constraint. - Nobutomo Matsunaga; Koji Sasano; Hiroshi Okajima (CCA, 2010)

Optimal quantization interval design of dynamic quantizers which satisfy the communication rate constraints. - Hiroshi Okajima; Nobutomo Matsunaga; Kenji Sawada (CDC, 2010)

Emulation of Fast and Slow Pains Using Multi-Layer Sensor Modeled the Layered Structure of Human Skin. - Nobutomo Matsunaga; Aydin Tarik Zengin; Hiroshi Okajima; Shigeyasu Kawaji (J. Robotics Mechatronics, 2011)

Performance Limitation of Tracking Control Problem for a Class of References. - Hiroshi Okajima; Toru Asai (IEEE Trans. Autom. Control., 2011)

Villager centered transport system in unreached communities. - Jecinta Kamau; Andrew Rebeiro-Hargrave; Emran Abdullah; Rafiqul Islam Maruf; Kunihiro Nobuhara; Hiroshi Okajima; Ashir Ahmed (SMC, 2014)

Impedance Control of Two d.o.f. CPM Device for Elbow Joint. - Nobutomo Matsunaga; Shota Miyaguchi; Hiroshi Okajima; Shigeyasu Kawaji (J. Robotics Mechatronics, 2014)

Disturbance rejection performance limit for a class of disturbance signals. - Hiroshi Okajima; Toru Asai; Nobutomo Matsunaga (CDC, 2015)

Optimization of color quantization with total luminance for DLP projector and its evaluation system. - Gou Koutaki; Hiroshi Okajima; Nobutomo Matsunaga; Keiichi Uchimura (ICIP, 2015)

Robust and precise platoon driving control of welfare vehicles along wheel track by using model error compensator. - Tatsuya Sugano; Hiroshi Okajima; Nobutomo Matsunaga (IECON, 2015)

Providing safe and affordable transportation to reduce female students dropout: A case study on college girls in rural Bangladesh. - Nuren Abedin; Jecinta Kamau; Hironobu Kitaoka; Hiroshi Okajima; Masaharu Okada; Akira Fukuda; Ashir Ahmed (SMC, 2016)

Demand Responsive Mobility as a Service. - Jecinta Kamau; Ashir Ahmed; Andrew Rebeiro-Hargrave; Hironobu Kitaoka; Hiroshi Okajima; Zahidul Hossein Ripon (SMC, 2016)

Dynamic Quantizer Design Under Communication Rate Constraints. - Hiroshi Okajima; Kenji Sawada; Nobutomo Matsunaga (IEEE Trans. Autom. Control., 2016)

Color quantization and optimization of luminance for digital mirror device-based projector. - Gou Koutaki; Hiroshi Okajima; Nobutomo Matsunaga; Keiichi Uchimura (IEEE Trans. Consumer Electron., 2016)

Driving Assistance of Welfare Vehicle with Virtual Platoon Control Method which has Collision Avoidance Function Using Mixed Reality. - Nobutomo Matsunaga; Ryota Kimura; Haruya Ishiguro; Hiroshi Okajima (SMC, 2018)

Inter-Vehicle Distance Stabilization in Adaptive Cruise Control Using Signal Limitation Filter. - Yuta Nakabayashi; Hiroshi Okajima; Nobutomo Matsunaga (SMC, 2018)

Archive Method of Stone Wall in Kumamoto Castle Lifted by Small CMG Crane using Model Error Compensator. - Nobutomo Matsunaga; Naufal Bayu Fauzan; Hiroshi Okajima; Gou Koutaki (ASCC, 2019)

Driver's Gaze-point Analysis of Virtual Platoon Driving for Welfare Vehicle using Direct Eye Measurement Device with HMD. - Nobutomo Matsunaga; Yudai Takeuchi; Hiroshi Okajima (ASCC, 2019)

Dynamics modeling of necessary quantity of relief supplies in large-scale disasters. - Shizuku Kai; Minori Watanabe; Hiroshi Okajima (SICE, 2019)

Basic Idea of Periodically Time-Varying Dynamic Quantizer in Networked Control Systems. - Hiroshi Okajima; Yohei Hosoe; Tomomichi Hagiwara; Yuki Minami (SICE, 2019)

State Estimation By Observer Using Median Operation for Observed Output with Outliers. - Hiroshi Okajima; Yasuaki Kaneda; Nobutomo Matsunaga (SICE, 2019)

Restoration of Stone Wall "ISHIGAKI" Using Dropposition Information. - Yusuke Take; Hiroshi Okajima; Gou Koutaki; Nobutomo Matsunaga (SICE, 2019)

A Proposal of Collation Method Using Nonlinear SVM for Restoration of Stone Wall in Kumamoto Castle. - Yusuke Take; Shin-ya Tokunaga; Hiroshi Okajima; Nobutomo Matsunaga (SICE, 2020)

A Design Method of Model Error Compensator using Meta-Heuristics and LMIs. - Ryuichiro Yoshida; Yuki Tanigawa; Hiroshi Okajima; Nobutomo Matsunaga (SICE, 2020)

Crowd Tracking of Electric Wheelchair using RGB-D Camera with Median of Candidate Vectors Observer. - Ikuo Yamamoto; Kouich Nakamura; Nobutomo Matsunaga; Hiroshi Okajima (SICE, 2022)

Analysis of Measuring Precision of 3D Model of Ishigaki Stone in Kumamoto Castle Using Automatic CMG Crane System. - Nobutomo Matsunaga; Masaki Kuwahara; Hiroshi Okajima; Gou Koutaki (J. Robotics Mechatronics, 2022)

Design of Observer-Based Feedback Controller for Multi-Rate Systems With Various Sampling Periods Using Cyclic Reformulation. - Hiroshi Okajima; Kenta Arinaga; Atsuo Hayashida (IEEE Access, 2023)

State Observer Under Multi-Rate Sensing Environment and Its Design Using l2-Induced Norm. - Hiroshi Okajima; Yohei Hosoe; Tomomichi Hagiwara (IEEE Access, 2023)

Special Issue on Navigation and Control Technologies for Autonomous Mobility. - Yuki Minami; Hiroshi Okajima; Kenji Sawada; Kazuma Sekiguchi (J. Robotics Mechatronics, 2023)

Robust Cooperative Transport System with Model Error Compensator Using Multiple Robots with Suction Cups. - Nobutomo Matsunaga; Kazuhi Murata; Hiroshi Okajima (J. Robotics Mechatronics, 2023)

Navigation System for Personal Mobility Vehicles Following a Cluster of Pedestrians in a Corridor Using Median of Candidate Vectors Observer. - Nobutomo Matsunaga; Ikuo Yamamoto; Hiroshi Okajima (J. Robotics Mechatronics, 2023)

Cyclic Reformulation-Based System Identification for Periodically Time-Varying Systems. - Hiroshi Okajima; Yusuke Fujimoto; Hiroshi Oku; Haruto Kondo (IEEE Access, 2025)

System Identification Under Multi-rate Sensing Environment. - Hiroshi Okajima; Risa Furukawa; Nobutomo Matsunaga (CoRR, 2025)