• <tr id="yyy80"></tr>
  • <sup id="yyy80"></sup>
  • <tfoot id="yyy80"><noscript id="yyy80"></noscript></tfoot>
  • 99热精品在线国产_美女午夜性视频免费_国产精品国产高清国产av_av欧美777_自拍偷自拍亚洲精品老妇_亚洲熟女精品中文字幕_www日本黄色视频网_国产精品野战在线观看 ?

    微手系統(tǒng)的魯棒無(wú)源跟蹤控制

    2023-10-26 01:24:36李小永張玉義
    控制理論與應(yīng)用 2023年9期
    關(guān)鍵詞:無(wú)源工程學(xué)院青島

    步 妮,李小永,張玉義

    (青島科技大學(xué)自動(dòng)化與電子工程學(xué)院,山東青島 266061)

    1 Introduction

    Micro-hand is a kind of soft actuators,which is mostly driven by pneumatic,which can also be driven by fluid,electrically active polymer materials and so on[1–2].The actuator is mostly made of rubber material,which has the characteristics of low cost,flexible movement,high efficiency and simple operation.It can be used in medical surgery,emergency rescue,geological exploration and other fields[3–5].There are many excellent research achievements on rigid actuators,but soft actuators are quite different from traditional rigid actuators in design and manufacture,drive and sensing,structure and material technology.Therefore,it is necessary to conduct separate and in-depth researches on soft actuators[6–8].

    For the controlled systems with nonlinear characteristics,there are always various uncertainties in real systems,such as unmodeled dynamic characteristics,errors between measurement parameters and real values,and external disturbances which will have a certain impact on the modeling of the system,and may lead to system instability.Hence,due to the particularity of rubber materials and the multiple degrees of freedom of micro-hand,adopting appropriate research methods to study micro-hand is crucial.For micro-hand systems,most of the motion processes are nonlinear and usually present complex internal mechanisms and nonlinear characteristics,which leads to some inner variables of micro-hand cannot be defined and measured.As a result,it is difficult to relate with the physical meaning and real phenomenon of micro-hand using the traditional state space method.Meanwhile the operator-based robust right coprime factorization(RRCF)method is attracting more and more attention because i)only inputoutput model is used and measurements of the states in the real system are avoided;ii)the extended Banach space is more suitable for the system control theory and engineering;iii) robust stability of the nonlinear system can be guaranteed by a Bezout identity and a norm inequality.Therefore,owing to the structure and the material of the micro-hand system,the operator-based RRCF method is preferred[9–10].

    The systems with right coprime factorization can be stable and robust by satisfying the Bezout identity.Although the robust issue is discussed,however,the condition is so limited that it cannot be applied widely in[9].Further,some robust conditions for the plant with right coprime factorization under unknown but bounded interferences are derived.The RRCF is extended to the robust control design of more general nonlinear feedback systems by proposing an inequality condition based on the definition of Lipschitz norm [11–12],by which the output tracking and fault detection issues are discussed.

    Moreover,the isomorphism idea is introduced to explore the feasibility conditions of RRCF of the systems,and the design problems of nonlinear systems is studied [13–15].Through researches,it is found that it is difficult to get the inverse of the right factor because of the nonlinear part.Thus,the robust schemes are designed to ensure the robustness of nonlinear systems with uncertain as well as asymptotic tracking of input and output problems [16–17].The RRCF combined with the passivity property is discussed[18–19],wherein the robust condition and the storage function is respectively discussed by which the robustness and the passivity are both ensured.

    In this paper,robust tracking control for uncertain micro-hand systems is studied.The contributions are summarized as follows:

    i)The dynamic model of micro-hand system is established by using the operator-based RRCF method.

    ii)A passive robust controller is designed to ensure the robustness and passivity of the system.

    iii)The robust control scheme of dual Bezout is proposed,by which not only the robustness and passivity for the micro-hand systems but also the perfect tracking performance can be achieved.

    The following is the framework of this paper: In Section 2,the preliminary mathematical knowledge,including right coprime factorization and passivity,and the modeling of the micro-hand model are given.In Section 3,the passive control and robust control of nonlinear system are studied,and the control schemes based on dual Bezout identity by using RRCF is proposed to realize more precise tracking control of in-out.In Section 4,the effectiveness of the proposed method is verified by simulation.Section 5 describes the conclusion and future work.

    2 Micro-hand and RRCF

    The structure and mathematical model of microhand and some definitions of RRCF [9]will be introduced in this part.

    2.1 Micro-hand

    The structure of micro-hand is shown in Fig.1,where the actuator is circular arc shape.Due to the supplying air pressure,the studied micro-hand actuator is bent.According to Fig.2,simplified diagram of the actuator is obtained,where the pressurep(Pa)is the input and the bending angleθ(rad)is the output.The parameters of the model are shown in Table 1.

    Table 1 Parameters

    Fig.1 Micro-hand

    Fig.2 Analysis model of the actuator

    In Fig.3,the cross section of micro-hand is obtained,wherea(m)is the inside radius.Further,b(m)is the symbol of the maximum thickness.The center of the flat side is defined as the origin of polar coordinate system.The radius vector isr(m) and the argument is?(rad).ra(m) is rubber radius,which was shown as a fixed valuera=a+b/2 in previous studies.In fact,rais variable during inflation and expansion of the micro-hand actuator.It is imprecise to regardraas a fixed value.For the sake of rigor,the value ofrawill be identified using the RLS method in the simulation part.It is worth mentioning thatais supposed to be changeless and the changes in tube shape and size are considered as the uncertain part of the system.

    Fig.3 Cross section of the actuator

    The forcef1generated by pneumatic pressure in a small area of the end section of the actuator is shown as:

    The moment of the force generated by pneumatic pressureM1is shown as:

    Then,the opposite direction forcef2generated by spring in a small area of the bellows side:

    whererais the rubber radius,andE(Pa) is the Young’s modulus.Assuming that the modulus of elasticity varies with the elongation of the rubber,thenEis defined as:,whereE0(Pa)is the initial Young’s modulus.

    The moment of the force generated by spring forceM2:

    From the balance between the moment generated by pneumatic pressure and the one generated by spring force in the end section of the actuator

    Then,the nonlinear system model can be obtained from(2)(4)–(5)

    where theuandyare used to represent the inputpand the outputθ,γis the time-varying parameter of the model.

    2.2 Robust right coprime factorization

    Definition 1Suppose one operatorFcan be factorized intoNandD-1.Then if the two operatorsAandBexist whileBhas an inverse form,which are both stable and satisfy:

    whereA:Y →UandB:U →U,which is called to be the Bezout identity,for a unimodular operatorM:W →U,M ∈§(W,U),thenNandD-1is the right coprime factorization ofF.

    Assuming that the above system are well-posed and internal stability system and satisfies the bounded input and bounded output(BIBO)stability.Some definitions of these nouns have been defined in [9].Based on the above analysis,a nonlinear system with disturbances is obtained,which shows in Fig.4.In detail,the actual plant has the modeling error and the disturbance,which are regarded as the uncertainties.Then,the RRCF of the actual plantis described asF+?F=(N+?N)D-1,where ?Nis regarded as the uncertain operator that is unknown,but it is limited.

    Fig.4 The uncertain feedback nonlinear system

    Definition 2Suppose a nonlinear operatorF:De →Ye(De ?Ue)is the generalized Lipschitz operator onDe,if there exists a constant numberε

    where?x,∈De,especially,Lip(De):De →De.εis regarded as Lipschitz norm ofFand can be obtained by the following formula:

    Lemma 1LetDe ?Ue,if the following conditions are all true:

    3 Micro-hand system design

    In this part,the RRCF method is used to ensure the robust stability of the micro-hand system.Meanwhile,the passivity of the system with uncertain is ensured by designing robust controllers;further,the robust tracking control based on dual Bezout identity is applied to deal with the precise tracking for micro-hand with uncertainties.

    3.1 System design of micro-hand model

    The nonlinear plantF+?Fis defined as

    whereζis the parameter of the uncertain plant applying the nonlinear feedback system,F+?Fcan be factorized into the following two parts:

    The compensatorH-1shown in Fig.5 is designed as

    Fig.5 The nonlinear system with the compensator H-1

    According to Fig.6,the controllersAandBcan be designed as

    Fig.6 The passive feedback system

    whereKis the parameter which is designed to satisfy(12).Then,is obtained as

    3.2 Passivity-based nonlinear system

    In this part,the passivity of the micro-hand system is guaranteed by designing the robust passive controllers using the passivity-based control.

    The nonlinear plantF+?Fcan be factorized into(N+?N)andD-1.To design the passive system,the passivity-based robust control with compensatorH-1is designed by using isomorphism idea as shown in Fig.5,and the compensator can be described as

    among them,Iis regarded as the identity operator.The isomorphic passive nonlinear system design with uncertainty(N+?N)is shown in Fig.6,while it can also be equivalent to Fig.7,where=A(N+?N)+B.

    Fig.7 The equivalent system of Fig.6

    The storage functionV(ω)is designed as that

    According to (25),the micro-hand system is passive.It is of great physical significance to study the system from the perspective of energy,the nonlinear control feedback system is controlled to be stable and passive with the designed controllers by using RRCF.

    3.3 Tracking control based on dual Bezout

    After designing robust stability and passivity,tracking performance is considered.However,in the real applications,the uncertainties will damage the stability and various performances of micro-hand system.Hence,in order to improve the tracking performance,a robust tracking control scheme based on dual Bezout is proposed.In detail,by designing the controllersSandQwhich can satisfy Bezout identity again,the tracking performance of the system can be realized.

    In Fig.6,assume that the system is stabilized,where robust controllersAandBare designed to ensure the robust stability of the system.Based onA(N+?N)+B=,the equivalent system in Fig.8 can be obtained,whereS-1and-1are reversible,in order to satisfy

    Fig.8 Tracking control based on dual Bezout

    whereα,βandηare the design parameters,according to(9)

    Then,Fig.9 is obtained,which is equivalent to Fig.8.

    Fig.9 The equivalent system of Fig.8

    Through the above relationship,it is concluded that under the premise of robust stability of nonlinear feedback system,error signals are guaranteed that it get as close as possible to zero using the designed robust tracking controllersQandS.

    4 Simulation

    In this section,a simulation for micro-hand with uncertainties and external disturbances will be given to verify the effectiveness of the proposed scheme.

    However,there is a problem with the validation process: the shape of the bellows will change when the input pressure increases.In more detail,since the rubber radiusrais changing during rubber inflation and expansion,it is very difficult to design the compensatorH-1.Hence,the identification ofrabased on RLS method is carried out[20].

    It is clear from Table 2 and Fig.10 that the data has convergence.In detail,as the amount of data increases,the accuracy of parameter estimation will be higher.Finally,ra=1.0701×10-3(m)withσ2=0.052are chosen as the estimated radius when designing some controllers that includera.

    According to (29)–(30),the related parameters are chosen to beζ=0.6,K=0.67 and the reference inputThe structural and adjustment parameters are shown in Table 3 and the simulation results are as follows.

    Fig.11 shows the angular position tracking of flexible actuator.For the convenience of observation,the simulation running time is set to 100 s,and the error result is shown in Fig.12.According to Fig.12,it can be clearly seen that the tracking error is within acceptable limits,and it is close to zero within the range of±0.5.In order to verify the superiority of the tracking method based on dual Bezout,the angular position tracking by RRCF is shown in Fig.13.By contrast,the RRCF tracking method has a big error between the reference input and the output while the tracking method based on dual Bezout realizes perfect tracking performance.These simulation results illustrate that the robust tracking control scheme based on dual Bezout method realizes the accurate tracking of plant output.Further,the tracking error of micro-hand using this method can maintain high accuracy and also ensure the robustness of the micro-hand system.The passivity performance for micro-hand system shown in Fig.14.

    Fig.13 The position tracking by RRCF

    Fig.14 Passivity performance

    5 Conclusion and future work

    In this paper,using operator-based RRCF,the robustness and passivity of the micro-hand system are guaranteed by designing the improved robust controllers.Then,the tracking controller is designed in combination with the dual Bezout identity,which make the influence of the disturbance of the system as small as possible under the premise of ensuring the stability of the system,and makes the system have perfect tracking performance.

    Due to the nature of rubber tube,there will be timedelay and hysteresis in the process of inflating,which will not be ignored in our future research work.

    猜你喜歡
    無(wú)源工程學(xué)院青島
    福建工程學(xué)院
    福建工程學(xué)院
    福建工程學(xué)院
    一種三相無(wú)源逆變電源供電方案設(shè)計(jì)
    電子制作(2019年12期)2019-07-16 08:45:14
    上合,從青島再啟航
    金橋(2018年7期)2018-09-25 02:28:14
    青島如何引進(jìn)人才
    商周刊(2018年10期)2018-06-06 03:04:10
    福建工程學(xué)院
    基于PCH模型的航天器姿態(tài)無(wú)源控制
    青島明月申牌?
    無(wú)源互調(diào)干擾對(duì)TD-LTE系統(tǒng)的影響研究
    亚洲精品粉嫩美女一区| 亚洲自偷自拍三级| .国产精品久久| 国产精品亚洲美女久久久| 真实男女啪啪啪动态图| 男人狂女人下面高潮的视频| 国产精品嫩草影院av在线观看 | 色5月婷婷丁香| 久久伊人香网站| 美女 人体艺术 gogo| 美女cb高潮喷水在线观看| 一个人免费在线观看的高清视频| 床上黄色一级片| 天堂动漫精品| 村上凉子中文字幕在线| 午夜福利在线在线| av在线蜜桃| 国语自产精品视频在线第100页| 国产亚洲精品av在线| 亚洲av电影不卡..在线观看| 美女高潮的动态| 亚洲人成电影免费在线| 久久久色成人| 午夜老司机福利剧场| 日韩欧美免费精品| 一级毛片久久久久久久久女| 久久久精品欧美日韩精品| 欧美黄色片欧美黄色片| 热99在线观看视频| 色在线成人网| 午夜福利高清视频| 国产极品精品免费视频能看的| 伦理电影大哥的女人| 老司机深夜福利视频在线观看| 观看免费一级毛片| 欧美另类亚洲清纯唯美| 精品一区二区三区视频在线| 性色av乱码一区二区三区2| 国产一区二区在线av高清观看| 国产91精品成人一区二区三区| 无遮挡黄片免费观看| 免费在线观看影片大全网站| 亚洲 欧美 日韩 在线 免费| 国产成+人综合+亚洲专区| 国产伦精品一区二区三区四那| 国产综合懂色| 一卡2卡三卡四卡精品乱码亚洲| 在线免费观看不下载黄p国产 | 69人妻影院| 亚洲av第一区精品v没综合| 亚洲av第一区精品v没综合| 嫩草影院新地址| 亚洲性夜色夜夜综合| 九色成人免费人妻av| 国产黄a三级三级三级人| 97超视频在线观看视频| 免费高清视频大片| 宅男免费午夜| 国产视频内射| а√天堂www在线а√下载| 国产精品精品国产色婷婷| 国产黄色小视频在线观看| 黄色视频,在线免费观看| 国产精品一区二区三区四区久久| 婷婷六月久久综合丁香| 欧美在线黄色| av国产免费在线观看| 日本五十路高清| 久久久久久九九精品二区国产| 亚洲电影在线观看av| 国产精品一区二区性色av| 婷婷精品国产亚洲av在线| 免费看a级黄色片| 日韩成人在线观看一区二区三区| 人人妻,人人澡人人爽秒播| 99久久久亚洲精品蜜臀av| 久久精品人妻少妇| 91久久精品电影网| 永久网站在线| 在线观看66精品国产| 亚洲色图av天堂| 亚洲最大成人中文| 亚洲午夜理论影院| 国产精品野战在线观看| 成人美女网站在线观看视频| 国产成人啪精品午夜网站| 一级av片app| 免费在线观看亚洲国产| 精品一区二区三区视频在线| 成人无遮挡网站| 国产精品久久久久久人妻精品电影| 亚洲狠狠婷婷综合久久图片| 国产高清视频在线观看网站| 热99在线观看视频| 少妇丰满av| 欧美日本亚洲视频在线播放| 又粗又爽又猛毛片免费看| 国内精品美女久久久久久| 一级黄色大片毛片| 成人国产综合亚洲| 国产成+人综合+亚洲专区| 国产精品人妻久久久久久| 可以在线观看毛片的网站| 蜜桃久久精品国产亚洲av| 中出人妻视频一区二区| 国产日本99.免费观看| 99精品久久久久人妻精品| 亚洲欧美日韩高清专用| 男人的好看免费观看在线视频| 欧美成人一区二区免费高清观看| 亚洲七黄色美女视频| 在线观看美女被高潮喷水网站 | 午夜福利免费观看在线| 国产蜜桃级精品一区二区三区| 成人三级黄色视频| 2021天堂中文幕一二区在线观| 日韩人妻高清精品专区| 精品一区二区三区人妻视频| 在线观看免费视频日本深夜| 国产白丝娇喘喷水9色精品| 亚洲欧美日韩东京热| 亚洲无线观看免费| 亚洲中文日韩欧美视频| 免费观看精品视频网站| 亚洲第一电影网av| 国产精品永久免费网站| 免费黄网站久久成人精品 | 久久欧美精品欧美久久欧美| 99久久久亚洲精品蜜臀av| 国产精品一区二区性色av| 91午夜精品亚洲一区二区三区 | 亚洲成人免费电影在线观看| 午夜福利在线观看免费完整高清在 | 首页视频小说图片口味搜索| 夜夜夜夜夜久久久久| 国产av一区在线观看免费| 别揉我奶头 嗯啊视频| 午夜精品一区二区三区免费看| 国产探花在线观看一区二区| 韩国av一区二区三区四区| 久久精品国产亚洲av涩爱 | 免费在线观看日本一区| 国产免费男女视频| 欧美最新免费一区二区三区 | 成人国产一区最新在线观看| 成人毛片a级毛片在线播放| 国产高潮美女av| 人人妻,人人澡人人爽秒播| 一个人看视频在线观看www免费| 中文字幕av在线有码专区| 熟妇人妻久久中文字幕3abv| 久久香蕉精品热| 999久久久精品免费观看国产| 亚洲精品在线观看二区| 一a级毛片在线观看| 91麻豆精品激情在线观看国产| 国产91精品成人一区二区三区| 成人特级av手机在线观看| 岛国在线免费视频观看| 一级黄片播放器| 啦啦啦韩国在线观看视频| 亚洲中文字幕日韩| 3wmmmm亚洲av在线观看| 一个人免费在线观看的高清视频| 色播亚洲综合网| 99在线视频只有这里精品首页| 非洲黑人性xxxx精品又粗又长| 特大巨黑吊av在线直播| 欧美国产日韩亚洲一区| 男女那种视频在线观看| 免费在线观看日本一区| 亚洲中文日韩欧美视频| 又黄又爽又免费观看的视频| 亚洲国产高清在线一区二区三| 亚洲中文字幕日韩| 免费看a级黄色片| 亚洲av美国av| 国产精品女同一区二区软件 | 国内揄拍国产精品人妻在线| 我的女老师完整版在线观看| 99在线人妻在线中文字幕| 观看美女的网站| 高清毛片免费观看视频网站| 国产视频内射| 精品午夜福利视频在线观看一区| 国产av一区在线观看免费| 欧美乱色亚洲激情| 波多野结衣高清无吗| 亚洲成人精品中文字幕电影| 他把我摸到了高潮在线观看| 久久人人爽人人爽人人片va | x7x7x7水蜜桃| 亚洲avbb在线观看| 级片在线观看| 人人妻人人看人人澡| 白带黄色成豆腐渣| 日韩欧美 国产精品| 人人妻人人澡欧美一区二区| av天堂在线播放| 婷婷六月久久综合丁香| 免费看美女性在线毛片视频| 男人和女人高潮做爰伦理| 99久久成人亚洲精品观看| 看片在线看免费视频| 精品福利观看| 91字幕亚洲| 国内揄拍国产精品人妻在线| 亚洲av免费在线观看| 国产精品精品国产色婷婷| 免费看美女性在线毛片视频| 成年女人毛片免费观看观看9| 国产精品亚洲美女久久久| 久久国产乱子伦精品免费另类| 国产国拍精品亚洲av在线观看| 国产一区二区在线av高清观看| 免费大片18禁| 欧美成人a在线观看| 麻豆国产av国片精品| x7x7x7水蜜桃| 日本三级黄在线观看| 啦啦啦观看免费观看视频高清| 18+在线观看网站| 黄色一级大片看看| 精品一区二区三区人妻视频| 日本五十路高清| 99久久精品热视频| 国产欧美日韩精品一区二区| 久久久久久国产a免费观看| 长腿黑丝高跟| 一夜夜www| 国产精品久久视频播放| 能在线免费观看的黄片| 午夜福利成人在线免费观看| 久久久精品大字幕| 亚洲一区二区三区不卡视频| av福利片在线观看| 亚洲精品亚洲一区二区| 日本 av在线| 淫秽高清视频在线观看| 毛片一级片免费看久久久久 | 日韩精品中文字幕看吧| 国产高潮美女av| 色噜噜av男人的天堂激情| 精品久久国产蜜桃| 亚洲五月天丁香| bbb黄色大片| 天堂影院成人在线观看| 国产伦一二天堂av在线观看| 欧美三级亚洲精品| 午夜福利欧美成人| 国产精品三级大全| 欧美在线一区亚洲| 18禁黄网站禁片午夜丰满| 国产成人啪精品午夜网站| 少妇的逼水好多| 成年女人看的毛片在线观看| 五月伊人婷婷丁香| 嫩草影院精品99| 久久九九热精品免费| 日本三级黄在线观看| 中文资源天堂在线| av在线蜜桃| 亚洲综合色惰| 嫩草影院新地址| 无人区码免费观看不卡| 国产av一区在线观看免费| 欧美日韩瑟瑟在线播放| 国内少妇人妻偷人精品xxx网站| 国产伦精品一区二区三区视频9| 丰满乱子伦码专区| 又爽又黄无遮挡网站| 一个人看视频在线观看www免费| 精品久久久久久,| 亚洲狠狠婷婷综合久久图片| 国产69精品久久久久777片| 国产av麻豆久久久久久久| 九九在线视频观看精品| 国产高清激情床上av| 国产伦人伦偷精品视频| 热99re8久久精品国产| 九色国产91popny在线| 老司机深夜福利视频在线观看| 悠悠久久av| 日本 av在线| 免费看美女性在线毛片视频| 亚洲人成电影免费在线| 黄色丝袜av网址大全| 欧美绝顶高潮抽搐喷水| 此物有八面人人有两片| 美女高潮喷水抽搐中文字幕| 亚洲aⅴ乱码一区二区在线播放| 午夜激情欧美在线| 又黄又爽又刺激的免费视频.| 亚洲,欧美,日韩| 亚洲av成人不卡在线观看播放网| 亚洲av免费在线观看| 亚洲精品影视一区二区三区av| 国产精品伦人一区二区| 赤兔流量卡办理| 欧美三级亚洲精品| 日本 av在线| 日本免费a在线| 可以在线观看的亚洲视频| 尤物成人国产欧美一区二区三区| 久久久久免费精品人妻一区二区| 悠悠久久av| 亚州av有码| 男女视频在线观看网站免费| 美女 人体艺术 gogo| 天堂网av新在线| 亚洲电影在线观看av| 国产私拍福利视频在线观看| 亚洲av熟女| 久久草成人影院| 国产午夜精品论理片| 亚洲 国产 在线| 亚洲av成人av| 午夜福利视频1000在线观看| 国产 一区 欧美 日韩| 亚洲色图av天堂| 欧美日本亚洲视频在线播放| 综合色av麻豆| 成人av在线播放网站| 午夜视频国产福利| 91字幕亚洲| 日本免费a在线| 级片在线观看| 国产午夜精品久久久久久一区二区三区 | 成人av一区二区三区在线看| 美女黄网站色视频| 欧美精品国产亚洲| 欧美性猛交╳xxx乱大交人| 精品一区二区三区视频在线| 久久久精品大字幕| 亚洲电影在线观看av| 男女床上黄色一级片免费看| 高清毛片免费观看视频网站| 国产色爽女视频免费观看| 99视频精品全部免费 在线| 久久精品久久久久久噜噜老黄 | 免费看光身美女| avwww免费| 久久天躁狠狠躁夜夜2o2o| 尤物成人国产欧美一区二区三区| 亚洲精品一卡2卡三卡4卡5卡| 草草在线视频免费看| 亚洲av熟女| 老司机午夜福利在线观看视频| 搡老熟女国产l中国老女人| 久久欧美精品欧美久久欧美| 久久精品影院6| 亚洲成人久久爱视频| 日日摸夜夜添夜夜添小说| 一区二区三区高清视频在线| 国产精品一区二区三区四区久久| 国产亚洲精品久久久com| 国产大屁股一区二区在线视频| 欧美日韩瑟瑟在线播放| 欧美bdsm另类| 乱人视频在线观看| 成人鲁丝片一二三区免费| 欧美绝顶高潮抽搐喷水| 搡老岳熟女国产| 亚洲av第一区精品v没综合| 99久国产av精品| 国产精品国产高清国产av| 亚洲片人在线观看| 18美女黄网站色大片免费观看| 久久精品国产亚洲av天美| 黄色日韩在线| 日本 av在线| 亚洲精品久久国产高清桃花| 最近最新中文字幕大全电影3| 亚洲国产高清在线一区二区三| 久久中文看片网| 国产精华一区二区三区| 啦啦啦观看免费观看视频高清| 麻豆久久精品国产亚洲av| 国产精品三级大全| 日本撒尿小便嘘嘘汇集6| 内射极品少妇av片p| 男人舔女人下体高潮全视频| 夜夜爽天天搞| av黄色大香蕉| 永久网站在线| 国产精品一区二区三区四区久久| 热99re8久久精品国产| 久久久久免费精品人妻一区二区| 国产男靠女视频免费网站| 偷拍熟女少妇极品色| 国产精品亚洲av一区麻豆| 亚洲欧美日韩东京热| 国产免费av片在线观看野外av| 亚洲欧美清纯卡通| 免费在线观看日本一区| 久久欧美精品欧美久久欧美| 国产伦人伦偷精品视频| 亚洲国产精品久久男人天堂| 国产一级毛片七仙女欲春2| 亚洲av日韩精品久久久久久密| 色视频www国产| 欧美不卡视频在线免费观看| 亚洲,欧美精品.| 国产成人av教育| 日韩国内少妇激情av| 99久久精品热视频| 99在线视频只有这里精品首页| 91在线观看av| av欧美777| 国产麻豆成人av免费视频| 久久精品国产亚洲av涩爱 | 国产欧美日韩一区二区三| 久久久色成人| 国产精品亚洲美女久久久| 久久久成人免费电影| 可以在线观看的亚洲视频| 国产精品一区二区三区四区免费观看 | 偷拍熟女少妇极品色| 在线播放国产精品三级| 亚洲成人久久性| 91久久精品国产一区二区成人| 亚洲在线观看片| 国产三级中文精品| 一个人观看的视频www高清免费观看| av在线老鸭窝| av天堂在线播放| 久久天躁狠狠躁夜夜2o2o| 日日夜夜操网爽| 97人妻精品一区二区三区麻豆| 高清毛片免费观看视频网站| 伦理电影大哥的女人| 乱人视频在线观看| 国产探花在线观看一区二区| 日本 av在线| 亚洲av第一区精品v没综合| 成人欧美大片| 国产主播在线观看一区二区| 狂野欧美白嫩少妇大欣赏| 一个人看的www免费观看视频| 国产一区二区激情短视频| 丰满人妻熟妇乱又伦精品不卡| 免费看a级黄色片| 亚洲精品久久国产高清桃花| 天堂av国产一区二区熟女人妻| 一a级毛片在线观看| 午夜精品久久久久久毛片777| 看十八女毛片水多多多| 黄色视频,在线免费观看| 日韩欧美国产在线观看| 国产高清三级在线| 国产免费一级a男人的天堂| 中亚洲国语对白在线视频| 国产伦一二天堂av在线观看| 久久久久久久久大av| 狂野欧美白嫩少妇大欣赏| 国产白丝娇喘喷水9色精品| av黄色大香蕉| 午夜精品久久久久久毛片777| 在线十欧美十亚洲十日本专区| 久久人人爽人人爽人人片va | 国产色爽女视频免费观看| 亚洲国产精品999在线| 国产伦在线观看视频一区| 草草在线视频免费看| 国产视频内射| 国产极品精品免费视频能看的| 性色av乱码一区二区三区2| 亚洲三级黄色毛片| 一级a爱片免费观看的视频| 午夜精品在线福利| 欧美绝顶高潮抽搐喷水| 国产精品日韩av在线免费观看| www.熟女人妻精品国产| 国产乱人视频| 99riav亚洲国产免费| 99国产精品一区二区三区| 老司机午夜十八禁免费视频| 亚洲人成网站在线播放欧美日韩| 亚洲av电影在线进入| 真实男女啪啪啪动态图| 91av网一区二区| x7x7x7水蜜桃| 成年女人看的毛片在线观看| 欧美zozozo另类| 午夜日韩欧美国产| 亚洲av美国av| 婷婷丁香在线五月| 波多野结衣高清无吗| 99riav亚洲国产免费| 成人永久免费在线观看视频| 亚洲熟妇熟女久久| 国产av一区在线观看免费| 午夜福利18| 三级毛片av免费| 三级国产精品欧美在线观看| 性插视频无遮挡在线免费观看| 成人永久免费在线观看视频| 国产精品日韩av在线免费观看| 久久国产精品人妻蜜桃| 久久精品国产自在天天线| 成年免费大片在线观看| 亚洲精品一卡2卡三卡4卡5卡| 极品教师在线免费播放| 免费观看精品视频网站| 国产精品av视频在线免费观看| 欧美3d第一页| 日韩人妻高清精品专区| www.www免费av| 白带黄色成豆腐渣| 久久久久久久精品吃奶| 日韩欧美在线乱码| 他把我摸到了高潮在线观看| 中出人妻视频一区二区| 精品久久久久久久久亚洲 | www.www免费av| 伊人久久精品亚洲午夜| 国产成人福利小说| 真实男女啪啪啪动态图| 中文字幕人成人乱码亚洲影| 欧美xxxx性猛交bbbb| 人妻夜夜爽99麻豆av| 99riav亚洲国产免费| 白带黄色成豆腐渣| 观看美女的网站| 亚洲国产日韩欧美精品在线观看| 国产三级黄色录像| 99热精品在线国产| 国产精品免费一区二区三区在线| 婷婷丁香在线五月| 亚洲国产精品sss在线观看| 无人区码免费观看不卡| 日本免费一区二区三区高清不卡| 久久性视频一级片| 亚洲精品在线美女| 俺也久久电影网| 欧美最新免费一区二区三区 | 桃色一区二区三区在线观看| 人人妻,人人澡人人爽秒播| 午夜精品久久久久久毛片777| 精品一区二区三区视频在线观看免费| 18美女黄网站色大片免费观看| 日韩精品中文字幕看吧| 日日干狠狠操夜夜爽| 欧美乱色亚洲激情| 亚洲最大成人av| 国产探花在线观看一区二区| 十八禁网站免费在线| 国产在线精品亚洲第一网站| 宅男免费午夜| 中文字幕人妻熟人妻熟丝袜美| 黄色女人牲交| 99久久成人亚洲精品观看| 欧美bdsm另类| 性欧美人与动物交配| 人人妻人人澡欧美一区二区| 无人区码免费观看不卡| 国产免费一级a男人的天堂| 免费观看的影片在线观看| 国产精品98久久久久久宅男小说| 亚洲av熟女| 搞女人的毛片| 性色av乱码一区二区三区2| 好看av亚洲va欧美ⅴa在| 一个人免费在线观看的高清视频| 啦啦啦韩国在线观看视频| 亚洲av免费在线观看| 老女人水多毛片| 88av欧美| 十八禁国产超污无遮挡网站| 国产91精品成人一区二区三区| 国产综合懂色| 亚洲,欧美精品.| 亚洲第一电影网av| 欧美在线黄色| 免费黄网站久久成人精品 | 精品熟女少妇八av免费久了| 我的老师免费观看完整版| 国产真实乱freesex| 12—13女人毛片做爰片一| 成人性生交大片免费视频hd| 欧美+亚洲+日韩+国产| 国产精品美女特级片免费视频播放器| 91午夜精品亚洲一区二区三区 | 51国产日韩欧美| 亚洲精品一区av在线观看| 99久国产av精品| 热99在线观看视频| 色av中文字幕| 黄色女人牲交| 国产高清三级在线| 欧美黑人欧美精品刺激| 脱女人内裤的视频| 国产一区二区亚洲精品在线观看| 人人妻人人看人人澡| 少妇裸体淫交视频免费看高清| 老司机深夜福利视频在线观看| 69人妻影院| 国语自产精品视频在线第100页| 久久亚洲真实| 亚洲第一电影网av| 亚洲美女视频黄频| 国产精品永久免费网站| 丰满的人妻完整版| 中文字幕久久专区| 色综合站精品国产| 午夜日韩欧美国产| 免费观看人在逋| 婷婷亚洲欧美| 亚洲最大成人手机在线| 久久热精品热| 国产亚洲欧美98| 在线观看一区二区三区| 尤物成人国产欧美一区二区三区| 黄片小视频在线播放| 国产成人a区在线观看|