Electrical servo steering system operating method for motor vehicle, involves varying slew rate and/or fall time of phase cycle of pulse-width modulated voltage by multiplication or addition of generated random numbers
摘要
<p>The method involves allowing current to flow via a magnetic coil of an electric motor (10). The electric motor is controlled by a semiconductor switch based on a pulse-width modulated voltage. Random numbers are generated in a preset number range according to a preset density function. Slew rate and/or fall time of a phase cycle of the voltage is varied by multiplication or addition of the generated random numbers. The slew rate and/or the fall time are formed by calculating a difference between the current and a reference current.</p>
