Aircraft Actuator Fault Detection and Isolation using Piecewise Constant Fault Estimation Scheme

New solution bounds of the continuous algebraic Riccati equation and their applications in redundant control input systems

“…Theorem 4. Let k 1 and k 2 , respectively, be the controller gains of the systems (1) and (3). Assume that B 0 R −2 0 B T 0 is nonsingular.…”

“…Redundant control input systems play an important part in engineering, such as in modern aircraft [1][2][3][4][5], satellite launch vehicles (SLVs) [6][7][8][9][10], marine vehicle control [11], and robot systems [12,13]. In these nonlinear control systems, redundant control inputs are often used to improve the system performance or to employ redundant actuators to shape the system dynamics.…”

“…For convenience, we adopt the spectral norm used in [22], which is the largest singular value of the feedback matrix. For systems (1) and 3, the corresponding optimal controller gains are k 1 = R −1 0 B T 0 P 0 and k 2 = R −1 B T P , respectively. Here, let R n×n (C n×n ) be the set of n × n real (complex) matrices.…”

Fault diagnosis method for closed-loop satellite attitude control systems based on a fuzzy parity equation

“…Incorporation of reconfigurable or safety controls can protect the CLSACS from catastrophic accidents as well as enhance the resilience of the system. 8,9 Traditional fault diagnosis methods primarily consider open-loop systems, and there are currently no in-depth studies of fault diagnosis for closed-loop systems in the literature. Although Adnane et al 10 demonstrate a new design version of the extended Kalman filter which is effective and can be utilized as an alternative LEO satellite attitude estimation system, the study did not consider the sensor fault propagation problem in closed-loop systems.…”

تشخیص خرابی بالک آیرودینامیکی یک وسیله ی مافوق‌صوت براساس داده‌های واحد اندازه‌گیری اینرسی

“…xtOkt "1 KqY= |= Q@ = Q sRq C=t=Ok= xOvvmpQDvm w OyO|t VQ= Ro u; u=mt w C}ty= 'COW [2] "OyO|t s=Hv= =]N u}= |= Q@ u} Ro}=H sDU}U uDiQo Q_v QO '|@= QN =@ xr@=kt |= Q@ VwQ u} QDxO=U [3] [4] "OwW|t XNWt sDU}U |@=QN 'pOt w |Q}oxR=Ov= |=yxO=O |xU}=kt =@ xDio x}=B pOt |=yVwQ 'CU= sDU}U pOt x@ sra Q@ |vD@t xm =yVwQ u}= [5] "OwW|t 2 |w=UD |=[i R= xO=iDU= '|@= QN X}NWD |= Q@ =yVwQ u} QDOQ@ Q=mQB R= |m} sDU}U |ak=w |HwQN w Q=_Dv= OQwt |HwQN u}@ |xU}=kt w xOv=t O}rwD |= Q@ '|@Ya |xm@W Ovv=t |Qo}O |=yVwQ R= u}kkLt 'VwQ u}=Q@ xwqa [106] "CU= |= Q@ R}v Cr=L u}tND w QDt=Q=B u}tND '|WRer Ot QoC} -wQ 'Twmat l}t=v}O [2911] [30] %R= CU= CQ=@a CqO=at [30] [13] [15] Ov=xO=O |DWoR=@ VwQ l} u}vJty "OyO X}NWD 'x}=B pOt |=yQou}tND R= |}xawtHt [16] [17] "Ov=xO=O |vD@t |WwQ u}vJty "OyO X}NWD = Q =yC}a]k sOa w =t}B=wy |@} QkD |]NQ}e |rtar=Tma MQJ Qorta |@=QN`wv u}}aD w X}NWD |= Q@ |@Ya |xm@W Q@ K}LY |HwQN [19] 'C=ar=]t R= |NQ@ QO [18] "CU= xOW O=yvW}B xQ=wy=t l} AwmUwQ}S |=yQwUvU |HwQN w |m}t=v}O uQ=kD pY= T=U= Q@ ?w}at AwmUwQ}S [19] "CU= xOW xOR u}tND QO |@=QN X}NWD |xrUt 'R}v |Qo}O C=ar=]t QO 'xOW O=}`@=vt Q@ xwqa l} |rw] l}t=v}O |= Q@ 'lr=@ |@=QN |UQQ@ "CU= xOW u=}@ CwY jwi=t p}=Uw [20] [21] [22] Ov=xO=O O=yvW}B QoxOy=Wt Q@ |vD@t |WwQ u}kkLt X}NWD |= Q@ u=v; "Ovm|t sw=kt |m}t=v}OwQ}; C=W=WDe= w =yC}a]k sOa Q@=Q@ |}xawtHt R= RwQm R=i QO xr}Uw lr=@ Qorta |@=QN w I}B p=v=m QwUvU |@=QN pt=W =ylr=@ Qorta |@=QN [23] [24] "CU= xOW |}=U=vW Twmat xOW xO=iDU= Qorta |@=QN Q@=Q@ QO ?ka x@ s=o w VRer Ot pQDvm |x}=BQ@ sw=kt xOvwW C}=Oy Q}oyQ l} Qorta |@=QN ptLD w X}NWD |= Q@ u}vJty [25] "CU= |UQQ@ Qw_vt x@ [26] "CU= xOW xDiQo xQy@ VRer Ot |k}@]D QoxOy=Wt l} R= |= Q@ |rOtOvJ pQDvm |x}Q_v w swrat=v |OwQw QoxOy=Wt R= 'R}v [27] Qorta |@=QN "CU= xOW xO=iDU= xr}Uw Qorta |@=QN X}NWD |@=QN X}NWD |= Q@ |@Ya |xm@W w VRer Ot pQDvm ? }mQD R= u}kkLt xO=iDU= u}}=B CaQU u}WvQU uwO@ |xr}Uw l} |UQv}= |=yQwUvU w Qorta x@ C@Uv Cr=L u}tND Q@ |vD@t |=ysD}Qwor= xm Ov=xO=O u=Wv u=v; [28] "Ov=xOQm =@ xU}=kt QO pY=L G}=Dv |rw OvQD`} QU \NQ@ |=yOQ@Q=m |= Q@ QDt=Q=B u}tND u}=Q@=v@ [29] xOR u}tND Cr=L u}tND \UwD xm OW=@ |}=yQDt=Q=B O=OaD =@ Q@=Q@ 'M obs [35] (15) x@U=Lt u}vJ w CU= f u=O}...…”