W.D. Fisher

About

W.D. Fisher is a robotics and automation researcher whose career spans foundational work in robot joint control, manipulator dynamics, and precision fabrication systems. His most influential contributions lie in the domain of industrial robot torque control, where his early 1980s work on joint torque feedback using strain gauges demonstrated a dramatic reduction in effective frictional torques — from over 1,000 oz-inches to just 33.5 oz-inches — transforming the precision achievable in industrial manipulators. These paired publications have accumulated over 350 citations combined, cementing their status as landmark studies in robot control engineering. Fisher's 1992 work on hybrid position/force control further established his theoretical rigor, resolving a longstanding controversy around "kinematic instability" in robot manipulators and providing a mathematically correct formulation alongside a sufficient stability condition — together gathering over 120 citations. His research later evolved toward precision automation for biotechnology, including innovative inkjet-based microarray fabrication systems and vision-guided robot calibration for semiconductor and gene-chip manufacturing. This trajectory reflects a researcher adept at bridging classical robotics theory with cutting-edge applied engineering, making his body of work valuable reading for students in both control systems and biomedical automation.

Research Focus

Key Achievements

Top Papers

1. 1
   Joint torque control by a direct feedback for industrial robots

   186 citations · 1981
2. 2
   Joint torque control by a direct feedback for industrial robots

   170 citations · 1983
3. 3
   Hybrid Position/Force Control: A Correct Formulation

   98 citations · 1992
4. 4
   Sufficient stability condition for hybrid position/force control

   25 citations · 1992
5. 5
   A Biochip Microarray Fabrication System Using Inkjet Technology

   17 citations · 2007
6. 6
   Minimum ratio-locked profile times for robot trajectories

   6 citations · 1988
7. 7
   A planar object mapping and handling system for DNA micro-array deposition equipment

   5 citations · 2003
8. 8
   An industrial solution to automatic robot calibration and workpiece pose estimation for semiconductor and gene‐chip microarray fabrication

   3 citations · 2006
9. 9
   An automated biological fluid dispensing system for microarray fabrication using inkjet technology

   3 citations · 2006
10. 10
    Using the HCTL-1000 Motor Control Chip for Coordinated Robot Motions

    2 citations · 1988

Key Collaborators

Contact & Links