Accession Number : ADA332586

Title :   Interference Between 6 Degrees of Freedom in a 3D Hand Controller

Corporate Author : HUMAN FACTORS RESEARCH INST TNO SOESTERBERG (NETHERLANDS)

Personal Author(s) : Korteling, J. E. ; Oving, A. ; van Emmerik, M. L. ; van Erp, J. B. F.

PDF Url : ADA332586

Report Date : 04 JUL 1997

Pagination or Media Count : 41

Abstract : A six degree of freedom (DOF) hand controller is a device that can be used for the simultaneous control of multiple axes. These kinds of control tasks are common in areas such as teleoperation. Multi-axis control may be problematic as a consequence of interference I.e., the control of a certain DOF affected the simultaneous control of another. Irrespective whether the cause of this interference lies in the operator's motor system or in his information processing system, it can be detrimental to task performance. When input on one DOF always results in undesired input on another DOF, the nature of this interference is systematic (cross-talk). The magnitude of the interference is probably affected by the number of DOFs that has to be controlled simultaneously. This was investigated in an experiment in which a compensatory tracking task was performed. In this task one DOF of a cursor in a perspective display was disturbed (externally). Subjects had to compensate this disturbance using a 6-DOF hand controller. At the same time they had to minimize input on the other (irrelevant to tracking) DOFs. It was investigated whether there were differences between tracking performance between each separate degree of freedom (X, Y, Z, Roll, Pitch, or Yaw). Furthermore, the effect of additional (irrelevant) DOFs that had to be controlled simultaneously (0, 1, or 5), was examined. With regard to the irrelevant degrees of freedom, the steering error thus was completely caused by incorrect, accidental, steering inputs. Error on the relevant DOF was a sum of this incorrect steering input and the disturbance signal. Both these errors (expressed in RMS scores) can be used to indicate the extent to which degrees of freedom interfered with each other.

Descriptors :   *DISPLAY SYSTEMS, *DEGREES OF FREEDOM, INPUT, STEERING, YAW, JOBS, INFORMATION SYSTEMS, PERFORMANCE(HUMAN), TRACKING, BASE LINES, SIGNALS, ERRORS, AXES, MANUAL OPERATION, SYNCHRONISM, COMPENSATION, INFORMATION PROCESSING, TELEOPERATORS.

Subject Categories : Computer Programming and Software

Distribution Statement : APPROVED FOR PUBLIC RELEASE