基于二次调节原理的力矩负载模拟器中压力波动的补偿

 基于静液二次调节原理的力矩负载模拟器具有能够连续高速旋转和无多余力矩的特点。在恒压网络中，二次元件的力矩输出与其斜盘倾角成正比，即：如果系统压力出现波动，也将导致输出力矩的波动。导致系统压力变化的原因可能是油源压力脉动，但更主要是负载的变化。为了研究压力波动的影响及补偿，建立了基于静液二次调节原理的力矩负载模拟器，给出了仿真参数，并在此基础之上进行了仿真研究。为了提高力矩跟踪精度，提出利用斜盘倾角传感器和系统压力传感器来进行压力补偿，可有效地将系统压力波动对于力矩输出的影响抑制到20%左右。仿真和试验验证了此补偿方法的有效性。

Compensation for Pressure Vibration in Torque Load Simulator Based on Secondary Control Principle

The torque load simulator has the advantages of continuous rotary with high velocity and inexistence of extraneous torque. In the constant pressure network, the torque output of secondary unit is proportional to the angle of its swash plate angle. That is, the vibration of system pressure can lead to the instability of the output torque. The reason of pressure change may be the vibration of the oil source, but the main reason is the change of the load. The detail mathematical model is built to make a simulation research influence and compensation for the pressure vibration. In order to improve the torque trace accuracy, the swash plate angle sensor and system pressure sensor are used to compensate for the pressure vibration. Simulation and experiments can verify that the influence can be suppressed to about 20%. The simulation and experiments verify the validity.