公开(公告)号：WO2020117640A2

公开(公告)日：2020-06-11

申请号：PCT/US2019/063931

申请日：2019-12-02

Applicant: MTD PRODUCTS INC

Inventor： CHANG, Her-Jye ,  SMITH, Aaron ,  MAGGARD, Jay E.

IPC: B62D5/04 ,  B62D7/04 ,  B62D9/00 ,  B62D11/00

Abstract: A system and method for differential traction drive and steering axis coordination for an autonomous mower or other turf device includes initiating a steering motion based on determining a target forward speed and a steering rotational speed, calculating a left wheel speed and a right wheel speed, and applying the left and right wheel speeds, wherein the steering rotational speed is driven by a steering motor and the traction wheels associated with the autonomous mower, and the left and right wheel speeds are based on the target forward speed, a distance from a steering axle to the center of the respective wheel, and the steering rotational speed.

公开(公告)号：WO2020117640A3

公开(公告)日：2020-06-11

申请号：PCT/US2019/063931

申请日：2019-12-02

Applicant: MTD PRODUCTS INC

Inventor： CHANG, Her-Jye ,  SMITH, Aaron ,  MAGGARD, Jay E.

IPC: B62D5/04 ,  B62D7/04 ,  B62D9/00 ,  B62D11/00

Abstract: A system and method for differential traction drive and steering axis coordination for an autonomous mower or other turf device includes initiating a steering motion based on determining a target forward speed and a steering rotational speed, calculating a left wheel speed and a right wheel speed, and applying the left and right wheel speeds, wherein the steering rotational speed is driven by a steering motor and the traction wheels associated with the autonomous mower, and the left and right wheel speeds are based on the target forward speed, a distance from a steering axle to the center of the respective wheel, and the steering rotational speed.

公开(公告)号：EP4534391A2

公开(公告)日：2025-04-09

申请号：EP25158922.2

申请日：2019-12-02

Applicant: MTD Products Inc

Inventor： CHANG, Her-Jye ,  SMITH, Aaron ,  MAGGARD, Jay E.

IPC: B62D11/00

Abstract: A computer implemented method for traction control for a turf device. The method comprises detecting a wheel slip event; responsive to the wheel slip event, stopping motion of the wheel and then gradually increasing a wheel speed; detecting a wheel slip event; stopping motion of the wheel; determining that a steering angle of the wheel is less than or equal to a predetermined maximum steering angle and i) adjusting the steering angle of the wheel; and ii) gradually increasing the wheel speed while the steering angle is less than or equal to a predetermined maximum steering angle.

公开(公告)号：EP3918442A1

公开(公告)日：2021-12-08

申请号：EP20708974.9

申请日：2020-01-31

Applicant: MTD PRODUCTS INC.

Inventor： SMITH, Aaron ,  MEISTER, Kevin ,  MAGGARD, Jay E.

IPC: G05G9/047 ,  E02F9/20 ,  A01D34/68 ,  A01D34/00

公开(公告)号：EP3887226A2

公开(公告)日：2021-10-06

申请号：EP19828936.5

申请日：2019-12-02

Applicant: MTD PRODUCTS INC.

Inventor： CHANG, Her-Jye ,  SMITH, Aaron ,  MAGGARD, Jay E.

IPC: B62D5/04 ,  B62D7/04 ,  B62D9/00 ,  B62D11/00