Hardware-in-the-loop simulation of hydraulic actuation system

Performances of hydraulic actuation system (HAS) affect flight quality of the flight control system (FCS) directly. To reach a high performance, HAS must be tested in hardware-in-the-loop simulation (HILS) during its development stage. This paper designs the actuation controller based on high-speed digital signal processor (DSP), establishes the model of HAS with the hydraulic system simulation tool DSH ^plus and presents the HILS scheme, designs the interface modules of hardware and software between the HAS model and outer controller. Such factors as discretization error, delay of transmission and disturbances are taken into account in the HILS scheme, which makes the simulation results more accurate and credible. By the aid of the extended CAN module of DSP controller, it is easy to adjust the parameters in real time. Experiments show that the HILS scheme is satisfying and the design of HAS is correct.