内燃机—测功器实验系统的数字控制

THE STUDY OF THE DIGITAL CONTROL ALGORITHMS ON THE DIESEL ENGINE-WATER POWER ABSORBER OPERATING PATTERN

分别采用ＰＩＤ控制法和状态空间控制法对Ｂ１１３５柴油机—水力测功器系统进行数字控制，并基于准稳定模型建立了该柴油机的动态运动方程．实验表明，二种控制法都能使发动机稳定在预定工况点上，其转速偏差量小于±５ｒ／ｍｉｎ，扭矩偏差量小于±０．４Ｎ·ｍ．实验确定出ＰＩＤ控制法中的６个参数值．由于状态空间控制法的实现，还证实了发动机—水力测功器系统是一个非线性时变系统．

Two algorithms, PID control algorithm and the state-space control algorithm,are designed according to the requirements of B1 135 diesel engine automatic control system. Theoperating equahon of this engine is established based on the quasi-steady model. The experimental results show that the engine controlled by those control algorithms can stabilize in the givenstate, having rotating speed deviation within ±5r / min and torque deviation within ±0.4N. m.The controlling parameters in the PID algorithm are also experimentally optimized. In addition,a nonlinear time-variant mathematical model of B1135 diesel engine and water power absorberoperating pattern used in the state-space algorithm is established and testified.