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Abstract-Hydraulic servo system (HSS) is a kind of automatic control system widely used in fields of industry, aerospace, military, etc., whose performance directly influences whether the controlled object meet control requirements. In this paper, the composition and working principle of performance parameter test system for hydraulic servo system were introduced, and the error source from measuring rotation angel of gun barrel with electric cylinder displacement and its error compensation method were analyzed emphatically. Simulation experiment results show that the improved performance parameter test system meets the operating requirements of customer.

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Target seeker is a key component of missile, whose tracking performance in real guidance phases can be guaranteed by performance testing in its design stage. Generally, multi-sets of equipment are used in conventional testing method, which takes on some disadvantages of sophisticated operation and low levels of automation. To solve this problem, we developed an automatic test system of target seeker based on virtual instrument technology, which combines hardware units as PXI measuring and control platform, turntable system, target simulator, etc., together, and utilizes software design to achieve synchro dyne reception of serial port data, information acquisition & display of video image and integrated control of turntable. Applications indicate that the system can accomplish automatic testing tasks, effectively reduce test period, and greatly improve automation and intelligent level in performance testing of target seeker.