Hiroyuki Kojima

About

Hiroyuki Kojima is a Japanese robotics researcher whose work spans industrial automation, flexible robot systems, and human-robot interaction. Over a career stretching from the late 1980s to the 2010s, Kojima has made sustained contributions to the design and control of robotic manipulators, with particular expertise in pneumatic actuation, flexible arm dynamics, and trajectory optimization. His most recognized work centers on pneumatic robot arms for industrial material handling — systems capable of grasping diverse objects without relying on force sensors or feedback control, earning over 30 citations across related publications. Kojima has also pioneered the application of genetic algorithms to trajectory planning for both rigid and flexible robot arms, developing quasi-minimum time methods and CP control strategies that reduce residual vibrations and improve precision. His early investigations into torque ripple-induced vibrations in harmonic drive mechanisms addressed a practical challenge still relevant to industrial robotics today. Beyond industrial systems, Kojima has explored cooperative multi-robot transportation with obstacle avoidance and the development of socially aware partner robots capable of human tracking and emotional modeling within virtual-reality learning environments. This breadth — from actuator-level mechanics to high-level human-robot communication — reflects a researcher committed to bridging foundational control theory with real-world robotic applications across manufacturing and everyday human environments.

Research Focus

Key Achievements

Top Papers

1. 1
   Development and control of pneumatic robot arm for industrial fields

   17 citations · 2011
2. 2
   Development and Control of a Pneumatic Robot Arm for Industrial Fields

   15 citations · 2012
3. 3
   Evolutionary Learning Acquisition of Optimal Joint Angle Trajectories of Flexible Robot Arm

   6 citations · 2006
4. 4
   Robot vibrations caused by torque ripples in power transmission mechanisms.

   5 citations · 1989
5. 5
   Cooperative Obstacle-Avoidance Pushing Transportation of a Planar Object with One Leader and Two Follower Mobile Robots

   5 citations · 2005
6. 6
   Quasi-Minimum Time Trajectory Planning Method of Robot Arm with Electromagnetic Attraction Hand Using Genetic Algorithm and Experiments

   4 citations · 2009
7. 7
   Trajectory Planning of CP Control Flexible Robot Arm Using Genetic Algorithm.

   4 citations · 2002
8. 8
   A Study on Partner Robots using Emotional Model: Construction of Virtual-Reality Space and Interaction with People in The Space

   3 citations · 2008
9. 9
   Human Tracking and Natural Communication of Partner Robots

   3 citations · 2007
10. 10
    Experiments on Reduction Control of Residual Vibrations of Flexible Robot Arm Using Desired Signal Planning of Joint Angle and Disturbance Obsever.

    3 citations · 2000

Key Collaborators

Contact & Links