Abstract: The present invention is an seat sensor calibration system used to calibrate the output of a pressure sensor embedded in a vehicle seat. The embedded pressure sensor is used in a vehicle to determine the force which air bags should deploy during a collision. The seat sensor calibration system has an assembly for dropping a body weight form on a vehicle seat from a fixed height. The calibration system also has data acquisition electronics for controlling the positional of the body weight form over the seat and for measuring the output of the pressure system. The seat sensor calibration system acquires the output of the pressure sensor upon impact and then immediately after lifting the weight form from the vehicle seat.

Abstract: A stall control system for axial flow compressors incorporating: a plurality of pressure transducers for developing signals indicative of the nonsteady pressure variations within the compressor and wherein these signals are separately filtered and rectified; analog comparators and gate comparators for each such signal to develop an output indicative of the difference between each of the signals and an adjusted pressure reference signal which is derived from the pressure rise across the compressor; a logic circuit for generating an actuating signal if any one of such signals is higher than the reference signal for controlling the opening of a gate which passes the combined pressure signals to an integrator which develops an output control signal to take corrective action in the presence of rotating stall within the compressor: an adjustable time delay circuit providing long and short decay times to prevent over-control.