system and method for control of broadcast rapportovariabile

摘要

A system for controlling a variable-ratio transmission is mounted on an apparatus (1) and associated with an actuator (2) for changing the transmission ratio, as well as operating means (3) for applying an input driving force to the transmission with a periodic action of given frequency. The system comprises first sensor means (5) which are sensitive to the driving force and can generate a respective first signal, second sensor means (6) which are sensitive to the spreed of operation of the apparatus (1) and can generate a respective second signal, as well as a control device (4) which is sensitive to the first and second signals and can control the actuator (2) in dependence on the first and second signals. The control device (4) is configured to determine, from the first and second signals, a reference signal indicative or a reference value of the frequency (CR). This reference signal is compared with a third signal (7) indicative of the given frequency so as to identify a corresponding deviation signal (e). The control device (4) acts on the actuator (2) in order to change the transmission ratio so as to minimize the deviation signal (e).