With the purpose of lightening Stirling cooler used for space, a split Free-Piston Stirling cooler is designed and assembled based on a previous double-driven split Stirling cooler operated successfully. Compared with double-driven Stirling cooler, the stroke and phase of pneumatically driven displacer in the Free-Piston Stirling cooler are hard to control. In this paper the way of adjusting the stroke and phase, which will give a preferable stroke and phase, is studied experimentally in detail. And some methods of adjusting correlative parameters are achieved. Driven by the same compressor, the cooling performance of the Free-Piston split Stirling cooler under optimal parameters setting is close to that of double-driven Stirling cooler.
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