The working environment of the control system of the auxiliary power unit is very bad.

       1 anti-jamming

       Because the auxiliary power unit control system works in the strong electromagnetic field environment, so it is particularly important to suppress the external interference source, such as between strong and weak electrical signals should be effective shielding isolation, simulation and the number of words to the ground. The filter circuit added to the analog signal acquisition module can reduce the interference beyond the signal frequency. The power supply module adds bypass capacitor and decoupling capacitor, which can effectively remove the mutual interference in the circuit.

       2 the reliability

       The auxiliary power unit control system is powered by vehicle +12V power supply. The voltage of this power supply is generally unstable, with a fluctuation range of 10V to 14V. Therefore, protection circuit is added into the power supply circuit to ensure that the auxiliary power unit control system can withstand a certain instantaneous overvoltage.

       The power unit also provides a cost advantage for special applications.

       For example, the HE power unit, built on a multi-purpose platform, allows the use of motor sizes from 80 to 132mm(0.3 to 4.5kw), pump displacement from 0.24 to 5.7cc. More than one power unit can control four hydraulic cylinders. The core component of the system is the adapter. There are two different specifications. It has various shapes and mounting methods.

       There is a lot of pressure in the depths of the ocean, and as the depth increases, the pressure increases, and when it reaches 6000 meters, the pressure is 60MPa. If such a large pressure is borne by the hydraulic power source, plus the pressure required for the system to work, the hydraulic pressure pump burden is very heavy, and this is not economical, the efficiency of the hydraulic power unit will be very low, and the whole structure shell must be made very thick to withstand the water pressure. This increases the weight of the system and makes it difficult to seal the system, so a special device must be designed to balance the internal and external pressure of the system.