Dynamic DX-REMG91, Руководство по установке

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Chapter 6: Programming G91 53
Preventing Front Wheel Drive Chairs From Spinning
The 3 options for Speed X Turn for Grip, Accel out of a Turn for Grip and Accel into a
Turn for Grip are a set of parameters that define a Virtual Restrictor Plate (VRP)
specifically designed to improve the safety and controllability of Front and Mid-Wheel
Drive chairs.
These 3 “Speed X Turn” parameters together define the mechanical properties that
affect the stability of the chair and are set by the manufacturer for each particular
chair design.
They are NOT designed to be tuned for specific users.
Chair stability is defined by the ability of the chair to make a turn at speed without
losing control. A chair may be stable turning slightly while moving at a high speed
forward, or it may be stable making a fast turn on the spot, but it may be unstable
making a sharp turn at a high speed. For any chair design, there is a maximum
combined value of Speed and Turn for which the chair will not lose control. Loss of
control means the chair‟s inertia and turn component are such that the tyres skid,
rendering any action from the controller ineffective. The chair design, the state and
inflation of the tyres, the friction of the driving surface, and the position of the user
affect skidding.
Possible starting point for FWD wheelchairs could include:
Parameter Name Potential Setting
Speed X Turn for Grip 60%
Accel out of a Turn for Grip 150%
Accel into a Turn for Grip 150%
Turning @ Full Speed 65%
Turning Accel @ full Speed 200%
Note:
These settings are to be used as a guide only. It is the responsibility of
the wheelchair manufacturer to ensure the program is safe and
suitable for their particular chair configuration.