Patent ID: 8448741

Claim:
A vehicle including an articulated frame having a front portion and a back portion, a plurality of traction devices configured to propel the frame on the ground, at least one hydraulic actuator coupled to the front and back portions of the frame to control the relative positions of the front and back portions of the frame, and a control system coupled to the at least one hydraulic actuator and including a steering wheel, a controller, a steering wheel sensor positioned to detect the position of the steering wheel and communicate the position of the steering wheel to the controller, a hydraulic fluid control positioned to provide hydraulic fluid to the at least one hydraulic actuator and receive communication from the controller to adjust the position of the hydraulic actuator in response to a change in position of the steering wheel, a vehicle condition sensor positioned to detect a condition of the vehicle and communicate the condition to the controller, and a resistance control device coupled to the steering wheel and in communication with the controller to adjust the resistance to movement of the steering wheel in response to the condition sensed by the vehicle condition sensor.