Anti-bounce control system for a machine

Abstract

A system for automated control of a motor grader includes a first sensor to indicate bounce of the motor grader and a speed sensor to indicate the ground speed. A controller determines a maximum amplitude of the bounce of the motor grader and controls the ground speed of the motor grader at least in part based upon the maximum amplitude of the bounce. A method is also provided.

1 . A system for automated control of movement of a motor grader, the motor grader including a prime mover and a ground engaging blade, comprising:
 a first sensor disposed on the motor grader configured to provide a bounce signal indicative of a measured bounce of the motor grader;   a speed sensor disposed on the motor grader configured to provide a speed signal indicative of a ground speed of the motor grader; and   a controller configured to:
 receive the bounce signal from the first sensor; 
 determine a maximum amplitude of the measured bounce of the motor grader based upon the bounce signal; and 
 generate a command signal to apply a brake at least in part based upon the maximum amplitude of the measured bounce, the brake reducing the ground speed of the motor grader. 
   
     
     
         2 . The system of  claim 1 , wherein the controller is further configured to determine the maximum amplitude of the measured bounce in a first direction and within a first frequency range. 
     
     
         3 . The system of  claim 2 , wherein the controller is further configured to determine the maximum amplitude of the measured bounce in a second direction and within a second frequency range. 
     
     
         4 . The system of  claim 3 , wherein the first frequency range is different from the second frequency range. 
     
     
         5 . The system of  claim 3 , wherein the controller is further configured to determined the maximum amplitude of the measured bounce in a third direction and within a third frequency range. 
     
     
         6 . The system of  claim 1 , wherein the command signal reduces the speed of the prime mover. 
     
     
         7 . A controller implemented method of adjusting movement of a motor grader, the motor grader having a prime mover, a ground engaging blade, a first sensor configured to provide a bounce signal indicative of a measured bounce of the motor grader, and a speed sensor disposed on the motor grader configured to provide a speed signal indicative of a ground speed of the motor grader, comprising:
 receiving the bounce signal from the first sensor;   determining a maximum amplitude of the measured bounce of the motor grader based upon the bounce signal; and   generating a command signal within the controller to apply a brake at least in part based upon the maximum amplitude of the measured bounce, the brake reducing the ground speed of the motor grader.   
     
     
         8 . The controller implemented method of  claim 7 , further including determining the maximum amplitude of the measured bounce in a first direction and within a first frequency range. 
     
     
         9 . The controller implemented method of  claim 8 , further including determining the maximum amplitude of the measured bounce in a second direction and within a second frequency range. 
     
     
         10 . The controller implemented method of  claim 7 , further including reducing the speed of the prime mover. 
     
     
         11 . A motor grader comprising:
 a prime mover;   a ground engaging blade;   a first sensor disposed on the motor grader configured to provide a bounce signal indicative of a measured bounce of the motor grader;   a speed sensor disposed on the motor grader configured to provide a speed signal indicative of a ground speed of the motor grader; and   a controller configured to:
 receive the bounce signal from the first sensor; 
 determine a maximum amplitude of the measured bounce of the motor grader based upon the bounce signal; and 
 generate a command signal to apply a brake at least in part based upon the maximum amplitude of the measured bounce, the brake reducing the ground speed of the motor grader. 
   
     
     
         12 . The motor grader of  claim 11 , wherein the controller is further configured to determine the maximum amplitude of the measured bounce in a first direction and within a first frequency range. 
     
     
         13 . The motor grader of  claim 12 , wherein the controller is further configured to determine the maximum amplitude of the measured bounce in a second direction and within a second frequency range. 
     
     
         14 . The system of  claim 1 , wherein the controller is further configured to receive an operator-generated prime mover command signal from an operator and the command signal generated by the controller temporarily overrides the operator-generated prime mover command signal. 
     
     
         15 . The system of  claim 14 , wherein the controller temporarily overrides the operator-generated prime mover command signal while the measured bounce exceeds a predetermined value. 
     
     
         16 . The controller implemented method of  claim 7 , further including receiving an operator-generated prime mover command signal from an operator and temporarily overriding the operator-generated prime mover command signal with the command signal generated by the controller. 
     
     
         17 . The controller implemented method of  claim 16 , wherein the operator-generated prime mover command signal is temporarily overridden while the measured bounce exceeds a predetermined value. 
     
     
         18 . The motor grader of  claim 11 , wherein the controller is further configured to receive an operator-generated prime mover command signal from an operator and the command signal generated by the controller temporarily overrides the operator-generated prime mover command signal. 
     
     
         19 . The motor grader of  claim 18 , wherein the controller temporarily overrides the operator-generated prime mover command signal while the measured bounce exceeds a predetermined value. 
     
     
         20 . The system of  claim 1 , wherein the brake is one of a service brake and a parking brake.