大型模锻液压机活动横梁的角度保持精度直接影响锻件的加工精度和机体受力状况。首先分析了液压机同步平衡系统的原理,建立了同步平衡系统多输入多输出数学模型,并针对同步平衡系统时变、时滞、强耦合和非线性的特点,选用模型预测控制来保证活动横梁的角度位置精度。仿真结果表明,与传统PID控制方法相比,模型预测控制具有控制精度高、响应速度快和稳定性好等优点。 Large forging hydraulic machine angle of the movable beam to maintain the accuracy of a direct impact on forging precision machining and body stress conditions. Firstly, the principle of synchronous balancing system of hydraulic machine is analyzed and the mathematical model of multiple input and multiple output of synchronous balancing system is established. According to the characteristics of time-varying, time-delay, strong coupling and nonlinearity of synchronous balancing system, model predictive control Angle position accuracy. The simulation results show that compared with the traditional PID control method, the model predictive control has the advantages of high control accuracy, fast response and good stability.