Friction compensation device and friction compensation method using mdps friction compensation logic

Abstract

The invention of MDPS friction compensation logic and a friction compensation method utilizing it is disclosed. The MDPS friction compensation logic of the present invention is characterized in that it includes: a signal processing unit that extracts only signals within a limited range from the steering column torque signal received from the steering column torque signal; a friction compensation sign calculation unit that integrates the signal in the signal processing unit A friction compensation sign is determined for the extracted steering column torque signal, and a value of the integral is limited to a set value and calculated; and a friction compensation torque calculation unit reflects the friction compensation on the value calculated by the friction compensation sign calculation unit. to calculate the friction compensation torque.

Description

technical field [0001] The invention relates to MDPS friction compensation logic and a friction compensation method using it. In more detail, when driving the MDPS, the MDPS friction compensation logic and the friction compensation method using it are used to calculate the friction compensation torque based on the interval of friction fixation when the MDPS is driven. Background technique [0002] Generally speaking, the electric power steering (Motor Driven Power Steering, "hereinafter referred to as MDPS") system is based on the principle that the power handle is usually not driven by the drive of the power pump to circulate the oil, but is set separately at the lower end of the steering wheel shaft for A system that activates the steering engine that generates auxiliary steering force, activates the vehicle engine, operates the steering engine, and operates the power handle. [0003] In this way, for smooth operation of the MDPS system, such as figure 1 As shown, when c...

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Problems solved by technology

[0004] Generally speaking, the MDPS system is based on the friction (friction) that occurs when the steering components are driven separately. If the auxiliary steering force required to steer the engine is not generated, it is difficult to drive the power steering by the steering engine, so that the steering feel or initial improvement ( The build-up) feeling is not good, which will make the driver feel a different sense of steering

[0005] In addition, there is a problem of an artificial boost feeling due to excessive torque fluctuation due to excessive on-center steering column torque due to friction.

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