高压气动容积减压分级控制原理与特性

为了提高容积减压能量补偿效果，提出分级控制容积减压的概念。通过高压气动系统定压补偿分级减压的能量原理和减压过程中的能量特性分析，证明了分级减压是一种有效的节能减压方法。通过建立控制系统的数学模型和进行仿真分析，研究了两级控制容积减压系统控制特性；两级控制容积减压系统的试验研究结果表明：建立的理论模型是符合实际的；一级减压的设定压力只要高于二级减压设定压力的临界输入压力值，就能得到稳定的控制压力输出。

RESEARCH ON PRINCIPLE AND PROPERTY OF CLASSIFICATION CONTROL PRESSURE REDUCTION BY EXPANDER IN HIGH PRESSURE PNEUMATIC SYSTEM

For improving the energy application of pressure reduction by expander in high pressure pneumatic system, the pressure reduction with classification control is proposed. It is a useful energy saving method proved by the energy compensating principle and property under the equal pressure condition. The mathematic model, the simulation and the experiment of the two steps control system are completed. The results show that the theoretical model approximately corresponds with the test; and the prerequisite of holding good control performance of the system pressure output is mat the output pressure of the first step pressure reducing is higher than the critical input pressure of the second step pressure reducing.