机构:
UNIV CALIF SANTA BARBARA,CTR CONTROL ENGN & COMPUTAT,SANTA BARBARA,CA 93106UNIV CALIF SANTA BARBARA,CTR CONTROL ENGN & COMPUTAT,SANTA BARBARA,CA 93106
FREEMAN, RA
[1
]
KOKOTOVIC, PV
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机构:
UNIV CALIF SANTA BARBARA,CTR CONTROL ENGN & COMPUTAT,SANTA BARBARA,CA 93106UNIV CALIF SANTA BARBARA,CTR CONTROL ENGN & COMPUTAT,SANTA BARBARA,CA 93106
KOKOTOVIC, PV
[1
]
机构:
[1] UNIV CALIF SANTA BARBARA,CTR CONTROL ENGN & COMPUTAT,SANTA BARBARA,CA 93106
We show that the Lyapunov function used in backstepping feedback designs for uncertain nonlinear systems leads to unnecessarily 'hard' control laws having undesirable high-gain properties. We present a new Lyapunov function and use it to design 'softer' control laws which exhibit the high-gain properties to a much lesser extent. We show that the 'soft' designs eliminate the chattering exhibited by the 'hard' designs and achieve the same or better performance with less control effort.