Leveling control technology of hydraulic system based on fuzzy decoupling algorithm

Hydraulic leveling system has been widely used in modern national defense and civilian technologies. The control of hydraulic automatic leveling is a complex nonlinear time-varying system, and during the hydraulic leveling, the system will appear the “implicated coupling” problems between hydraulic legs as well as between the angle and legs. In this paper, the “surface -adjust-surface” leveling technique is proposed by the leveling method. The method is based on the target surface with multi-point and multi-direction control by outputting control variables from leveling the relative position between leveling surface and target surface. We design the decoupling fuzzy controller of MIMO(multiple input multiple output) nonlinear dynamic solution. Besides, we adopt fuzzy decoupling algorithm to correct the output variables on line, so as to solve the coupling problem in the process of leveling and realize the multi-point adjustment. After on-site commissioning and target practice test, the result shows that the method not only has the advantage of simple principle and stable-reliable control performance, but also perfectly realizes precise and rapid leveling of hydraulic overloading platform. It can be promoted applies in the multi-spot automatic leveling system.