Follow-up damping control method for eliminating boarding inertial jitter and impact of construction crane
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The invention discloses a follow-up damping control method for eliminating boarding inertial jitter and impact of a construction crane. The method is mainly used for controlling the smooth start, the smooth operation and the smooth stop of a boarding operation device of the construction crane, and is also suitable to be used in a concrete pump truck and other construction machinery with an upper slewing operation device. At present, a plurality of conventional control methods such as an inlet buffer control method, an outlet back pressure control method, or a combination of the two methods are involved. All of the conventional methods cannot effectively control the smooth operation and the smooth brake of the boarding operation device of a host machine. The invention discloses the control method for establishing synchronous follow-up damping on an oil inlet path and an oil outlet path of a slewing hydraulic motor. By using the method, the damping of the oil inlet path and the oil outlet path of the slewing hydraulic motor changes synchronously; the pressure difference between an inlet and a throttle controls a load feedback valve connected with the inlet in series, which shunts excess flow when starting and eliminates the impact; and variable back pressures of the outlet and the throttle ensure a rotating platform start smoothly.