G - Physics – 06 – G
Patent
G - Physics
06
G
354/1
G06G 7/70 (2006.01)
Patent
CA 1065488
VEHICLE PERFORMANCE MONITOR Abstract of the Disclosure A vehicle performance monitor includes a simu- lator which responds to the same control signals as does the vehicle control system and, produces at its output, a signal against which actual vehicle performance can be measured. This signal and another signal, generated by the vehicle control system, indicative of vehicle perfor- mance are compared, by a comparator in the vehicle per- formance monitor, to determine if the vehicle is properly responding to the control signals. The simulator may comprise a function generator which accepts the control signals and transforms them in a form so as to control a voltage controlled oscillator (VCO). The VCO produces an output signal which can be compared with the output of a vehicle mounted device producing a signal related to the actual vehicle performance. For instance, the function generator may produce a signal re- lated to expected vehicle velocity and the vehicle mounted device may be a tachometer. The comparator includes a modulator and a band pass filter. Energy will pass the fil- ter only if the vehicle is proceeding at the command speed or within allowable tolerances thereof. Although double side band amplitude modulation may be employed, particular advantages are obtained employ- ing single band modulation. In particular, the single side band modulation provides a constant tolerance band independent of vehicle velocity and also provides vehicle direction information.
262066
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