To provide an electric power steering device which keeps an electric power motor under control by continuously running a predetermined electric current for return force generation thereto even when a steering angle sensor goes out of order, thereby performing the control of returning a steering angle by which the steering wheel is returned to a neutral position.
The detected value of a steering angle output by the steering angle sensor 11 is input into a steering angles mixture calculation part 43 via a switch 51. Based on resolver information output by a resolver 14, a conversion steering angle is calculated at a conversion steering angle calculation part 42b, and the conversion steering angle thus calculated is input into the steering angles mixture calculation part 43 via a switch 52. The steering angles mixture calculation part 43 has a parallel redundant signal of the detected value of the steering angle and the conversion steering angle input thereinto, while weighting the detected value of the steering angle and conversion steering angle respectively for mixing them for generating a mixed steering angle. After that, a steering angle returning control is carried out by the mixed steering angle output from the steering angles mixture calculation part 43. Even if the resolver 14 becomes out of order, detected values of steering angles from the steering angle sensor 11 are continuously transmitted.
TAKIMOTO SHIGENORI
YUDA MASATO
| JPH10258757A | 1998-09-29 | |||
| JPH07104850A | 1995-04-21 | |||
| JP2007269219A | 2007-10-18 |
Etsuo Tada
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