초록 ▼

A hitch control system generates a rockshaft valve control signal as a function of sensed draft force, rockshaft position and operator input. Periodically, an auxiliary or disturbance signal of certain amplitude, frequency and duration is superimposed on the valve command signal. A calculated soil/i

A hitch control system generates a rockshaft valve control signal as a function of sensed draft force, rockshaft position and operator input. Periodically, an auxiliary or disturbance signal of certain amplitude, frequency and duration is superimposed on the valve command signal. A calculated soil/implement gain is derived from components of the valve command signal and the measured draft force which have certain phase relationships with the disturbance signal. An electronic gain is modified so that the overall soil/implement gain remains substantially constant.

대표청구항 ▼

In a vehicle having connecting means for attaching a ground-penetrating implement thereto and actuating means for raising and lowering the implement in response to control signals applied to an input thereof, a control system comprising: a sensor for sensing at least one operating parameter of the i

In a vehicle having connecting means for attaching a ground-penetrating implement thereto and actuating means for raising and lowering the implement in response to control signals applied to an input thereof, a control system comprising: a sensor for sensing at least one operating parameter of the implement and connecting means; generating means for generating a control signal derived from said at least one sensed operating parameter of the implement and connecting means; means for superimposing upon the control signal a periodic, time-varying auxiliary signal; means for automatically determining a response characteristic of the sensed parameter to the auxiliary signal, the determining means comprising first means for determining a first sensed parameter component in phase with the auxiliary signal, second means for determining a second sensed parameter component having a quadrature phase relationship to the auxiliary signal, the first and second sensed parameter and components being dependent upon both the amplitude and phase of the sensed parameter, third means for determining a first control signal component in phase with the auxiliary signal, fourth means for determining a second control signal component having a quadrature phase relationship with the auxiliary signal, the first and second control signal components being dependent upon both the amplitude and phase of the control signal, and fifth means for deriving the response characteristic from a ratio of a sum of squares of the first and second parameter components to a sum of squares of the first and second control components; and means for automatically adjusting a variable gain of the generating means in response to changes in an amplitude of the response characteristic. In a vehicle having connecting means for attaching a ground-penetrating implement thereto and actuating means for raising and lowering the implement in response to control signals applied to an input thereof, a control system comprising: an operator-controlled device for generating a position signal representing a desired position of the implement; a position sensor for sensing implement position; a draft sensor for sensing draft force produced by implement-ground interaction; and generating means for generating a control signal derived from at least one sensed operating parameter of the implement and connecting means, the control system having a position control mode wherein the implement is controlled primarily as a function of the operator-controlled device and the sensed implement position and having a draft control mode wherein the implement is controlled primarily as a function of the sensed draft force, the control system including means operable upon start up of the control system for preventing any implement movement until the operator controlled device is adjusted by the operator to generate a position signal which corresponds to the sensed implement position.