Research on active disturbance rejection control algorithm for pressure pulse fatigue test bench of automotive radiators

When evaluating the fatigue resistance performance of automotive radiators using a pressure pulse fatigue test bench, it is necessary to periodically apply pressure signals to the radiators. The failure of any radiator during testing will induce variations in system parameters such as pressure and temperature, thereby compromising the assessment accuracy of the test platform. To address this challenge, this study proposes an active disturbance rejection control (ADRC) algorithm specifically designed for this testing system. Firstly, a mathematical model of the hydraulic system is established. Secondly, a reduced-order model-based ADRC algorithm is developed through theoretical derivation. In addition, experimental validation is conducted on the actual pressure pulse test bench. Experimental results demonstrate that, under variations in the command signal, the ADRC algorithm consistently exhibits superior pressure tracking performance and robustness compared to both conventional PID and fuzzy PID control algorithms.