Zongyu Zuo

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—This paper deals with the consensus control design for Lipschitz nonlinear multi-agent systems with input delay. The Art-stein-Kwon-Pearson reduction method is employed to deal with the input delay and the integral term that remains in the transformed system is analyzed by using Krasovskii functional. Upon exploring certain features of the Laplacian(More)
— In this paper, we address the fixed-time consensus problem for multi-agent systems in networks with directed and switching interaction topology. With the introduction of mirror operation, two global distributed nonlinear consensus protocols are constructed for each first-order agent under strongly connected information flow. The distinctive feature of(More)
The output tracking problem of gear transmission servo (GTS) systems with backlash nonlinearity is studied in this paper. A new concept-“soft degree”-is proposed to overcome the nondifferentiable “hard” characteristic of the backlash nonlinearity. Furthermore, a detailed softening process-static softening is presented, where a(More)
—Nonlinear dynamic model of a high-altitude unmanned airship, expressed by generalized coordinate, was built. A nonlinear compensation was introduced into the control loop to linearize and decouple the nonlinear system globally. In view of the imprecisely known inertia parameters of the airship, an adaptive law was proposed based on the feedback(More)
Based on input-output stability theory a new approach is introduced about cruise trajectory tracking adaptive control of a fully-actuated stratospheric airship. Firstly the dynamic model is expressed by the generalized coordinates. In view of the imprecisely unknown inertial parameters, online inertial parameter estimator and trajectory tracking law are(More)