Control method and system for using a pair of independent hydraulic metering valves to reduce boom oscillations

A hydraulic system comprising:

• a hydraulic cylinder;
• a first control valve fluidly connected to the hydraulic cylinder;
• and
• a controller in communication with the first control valve, the controller being adapted to transmit move signals to the control valve that causes the hydraulic cylinder to extend and/or retract, and the controller being adapted to transmit a vibration signal to the first control valve to produce a fluctuating pressure that causes the hydraulic cylinder to produce a vibratory response.

A method of controlling vibration in a boom, the method comprising:

• providing a hydraulic actuator including a pair of chambers;
• providing a valve arrangement including a pair of control valves corresponding to the pair of chambers, the pair of control valves being independently operable;
• identifying a vibratory condition;
• and
• transmitting a vibration signal to the first or second control valve to produce a fluctuating pressure that causes the hydraulic cylinder to produce a vibratory response.