中国机械工程
中國機械工程
중국궤계공정
CHINA MECHANICAl ENGINEERING
2014年
14期
1893-1899,1900
,共8页
力纷争现象%输入比%板阀死区%板阀开口面积梯度%可变节流孔
力紛爭現象%輸入比%闆閥死區%闆閥開口麵積梯度%可變節流孔
력분쟁현상%수입비%판벌사구%판벌개구면적제도%가변절류공
force-fight phenomenon%input ratio%valve’s dead zone%gradient of the valve’s open ar-ea%variable orifice
为了减缓或消除单反馈回路的余度舵机上的力纷争现象，并同时改善系统响应速度，在对飞机副翼舵面的结构进行分析的基础上，对系统的机械传动部分、板阀、作动筒、管路、转轴等进行建模仿真分析，得到了系统的带宽频率及由于舵机内部的不对称性所导致的系统纷争力大小。进一步研究了系统的输入比、板阀死区大小、板阀开口面积梯度对系统纷争力大小及系统响应速度的影响。仿真结果表明，将控制反馈回路的板阀死区设置得较小，有利于系统纷争力的减小；增大系统输入比可大幅度减小系统纷争力并提高带宽；减小板阀死区或增大开口面积梯度可提高系统带宽但并不影响纷争力的大小。因此合理设置两板阀死区，提高输入比、减小板阀死区或增大板阀开口面积梯度均可改善系统的动静态性能。在以上结构参数无法更改的情况下，提出了设置可变节流孔的方法减小系统纷争力，仿真结果证实了该方法的有效性。
為瞭減緩或消除單反饋迴路的餘度舵機上的力紛爭現象，併同時改善繫統響應速度，在對飛機副翼舵麵的結構進行分析的基礎上，對繫統的機械傳動部分、闆閥、作動筒、管路、轉軸等進行建模倣真分析，得到瞭繫統的帶寬頻率及由于舵機內部的不對稱性所導緻的繫統紛爭力大小。進一步研究瞭繫統的輸入比、闆閥死區大小、闆閥開口麵積梯度對繫統紛爭力大小及繫統響應速度的影響。倣真結果錶明，將控製反饋迴路的闆閥死區設置得較小，有利于繫統紛爭力的減小；增大繫統輸入比可大幅度減小繫統紛爭力併提高帶寬；減小闆閥死區或增大開口麵積梯度可提高繫統帶寬但併不影響紛爭力的大小。因此閤理設置兩闆閥死區，提高輸入比、減小闆閥死區或增大闆閥開口麵積梯度均可改善繫統的動靜態性能。在以上結構參數無法更改的情況下，提齣瞭設置可變節流孔的方法減小繫統紛爭力，倣真結果證實瞭該方法的有效性。
위료감완혹소제단반궤회로적여도타궤상적력분쟁현상，병동시개선계통향응속도，재대비궤부익타면적결구진행분석적기출상，대계통적궤계전동부분、판벌、작동통、관로、전축등진행건모방진분석，득도료계통적대관빈솔급유우타궤내부적불대칭성소도치적계통분쟁력대소。진일보연구료계통적수입비、판벌사구대소、판벌개구면적제도대계통분쟁력대소급계통향응속도적영향。방진결과표명，장공제반궤회로적판벌사구설치득교소，유리우계통분쟁력적감소；증대계통수입비가대폭도감소계통분쟁력병제고대관；감소판벌사구혹증대개구면적제도가제고계통대관단병불영향분쟁력적대소。인차합리설치량판벌사구，제고수입비、감소판벌사구혹증대판벌개구면적제도균가개선계통적동정태성능。재이상결구삼수무법경개적정황하，제출료설치가변절류공적방법감소계통분쟁력，방진결과증실료해방법적유효성。
To reduce or eliminate the force-fight phenomenon of single feedback loop of redundant-channels ,the mechanical transmission structure ,plate valves ,parallel actuating cylinders ,spindle and pipelines of the whole control system were modeled and simulated to obtain the bandwidth frequency of the system and the fighting-force caused by the internal asymmetry of the steering-gear .Then the influences of the system’s input ratio ,the size of valve’s dead zone and the gradient of the valve’s open area on the system’s fighting-force and response speed were studied .Simulation results show that setting the dead zone of the valve w hich controls the feedback loop smaller is conducive to the de-crease of system’s fighting-force ,and with the increase of the input ratio the fighting-force will be re-duced greatly and the bandwidth will be increased and with the reduce of the valve’s dead zone ,and the increase of the gradient of the valve’s open area ,the bandwidth frequency increases ,but have no influence on the fighting-force .Therefore ,increase the input ratio and reduce the valve’s dead zone or appropriate increase the gradient of the valve’s open area can improve the dynamic and static perform-ance of the system .Finally ,a method of setting a variable orifice put forward to reduce system’s fight-ing-force w hen these structural parameters cannot be changed ,and simulation results prove its feasi-bility .
