To obtain the desired posture of the human for a given adjusted
configuration of the car seat (linear and angular) kinematic links
were placed at the seated-human/seat contact interfaces (at the
back-rest and at the seat-pan). However, these links were not
allowed to transmit any forces/moments. As will be discussed
below, human-body/car-seat contact forces have been accounted
for through the use of ‘‘support points’’.