CAJ | 학술논문

为实现压力脉冲试验中标准压力波形的精确动态跟踪控制，满足高压力高频率持续冲击的要求，建立该试验的液压伺服系统与测控平台。将飞机用作动筒和伺服阀等被试液压件处理为封闭容腔，利用油液压缩性进行建压，采用LabVIEW图形化编程技术完成了液压系统的可视化动态伺服控制。在建立伺服阀、被试容腔和蓄能器数学模型的基础上，结合数字PID控制算法，完成AM ESim环境下的仿真，对比分析不同容腔容积和冲击频率对系统性能的影响，得到不同条件下系统流量和阀口开度等参数的理论值，仿真结果表明伺服阀需要有额定200 L／min以上的通流能力。实际试验系统以压力等级50 M Pa ，通流能力230 L／min的大流量伺服阀为直接控制对象，试验高压达到50 M Pa ，并可无级调整，压力冲击波形周期2 Hz、区间5～42 M Pa ，试验曲线落在标准阴影区以内，试验结果符合预期指标，并验证了仿真分析的可靠性。
위실현압력맥충시험중표준압력파형적정학동태근종공제，만족고압력고빈솔지속충격적요구，건립해시험적액압사복계통여측공평태。장비궤용작동통화사복벌등피시액압건처리위봉폐용강，이용유액압축성진행건압，채용LabVIEW도형화편정기술완성료액압계통적가시화동태사복공제。재건립사복벌、피시용강화축능기수학모형적기출상，결합수자PID공제산법，완성AM ESim배경하적방진，대비분석불동용강용적화충격빈솔대계통성능적영향，득도불동조건하계통류량화벌구개도등삼수적이론치，방진결과표명사복벌수요유액정200 L／min이상적통류능력。실제시험계통이압력등급50 M Pa ，통류능력230 L／min적대류량사복벌위직접공제대상，시험고압체도50 M Pa ，병가무급조정，압력충격파형주기2 Hz、구간5～42 M Pa ，시험곡선락재표준음영구이내，시험결과부합예기지표，병험증료방진분석적가고성。
The cylinder and servo‐valve applied to airplane hydraulic systems should be subject to periodic trapezoid‐shaped pressure impact test treated as a closed chamber . A hydraulic servo control system dynamically tracking the standard impact pressure curve was developed for the test .Mathematic models of the two stage servo‐valve and the being tested chamber was established ,and the simulation in AMESim was accomplished using the digital PID algorithm . The flow rate and valve open area under different chamber volume and different impact frequency was studied .Maximum flow rate of the servo valve in simulation is about 250 L/min under the condition of 5‐42 M Pa impact pressure ,6 L chamber volume and 2 Hz impact frequency .Experiment system could be visually real‐time controlled based on the LabVIEW and data acquisition card using graphic coding technology . Actual pressure curve generated by the hydraulic servo control system precisely falls into the standard area .Experiment results tally with the simulation and the system reaches the design target .