Motion control system for free piston bottom dead center of ionic liquid compressor

The embodiment of the invention provides a motion control system for a free piston bottom dead center of an ionic liquid compressor. The system comprises a compressor air inlet valve, a compressor exhaust valve, a compressor air cylinder upper end cover, a compressor air cylinder, an ionic liquid piston, a free piston, a compressor oil cylinder, an oil overflow path overflow valve, a radial plunger pump plunger, a radial plunger pump oil cylinder, an oil supplementing pump, a one-way valve, an oil supplementing path electromagnetic overflow valve, an oil supplementing path electromagnetic throttle valve and a controller. The device comprises a piston acceleration sensor, a piston displacement sensor, a piston speed sensor, an isolation cavity leakage hole and a compressor low-pressure isolation cavity. According to the scheme, cylinder collision is avoided while the free piston keeps high volume efficiency, the working efficiency of the ionic liquid compressor is improved, and the fault rate of the ionic liqu