Hongyun Yu

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An extended proportional navigation guidance (EPNG) law based on Lyapunov stability is proposed applying the concept of virtual target and 3-dimensional pursuit-evasion model. This guidance law can satisfy the requirements of miss distance and terminal angle, thus it guarantees that different parts of the large-airspace varying trajectory link smoothly.(More)
In this study, a novel liposome-loaded microbubble gel based on N-cholesteryl hemisuccinate-O-sulfate chitosan (NCHOSC) was designed. The structure of the NCHOSC was characterized by FTIR and (1)H NMR. The liposomal microbubble gel based on NCHOSC with a high encapsulation efficiency of curcumin was formed and improved the solubility of curcumin. The(More)
In order to remove the nonminimum phase characteristics of missile overload output, the output-redefinition technique is applied to the missile's overload control system. Because the overload control system doesn't control missile's attitude angle and angle rate, they are treated as uncertainty of the system. In order to improve the robustness of the(More)
The Lyapunov stability theorem has been proposed for more than 100 years, and it is still one of the most important theories in control science and other fields. In this paper, a new stability theorem (Extended Lyapunov stability theorem) is proposed and proved to be different from Lyapunov stability theorem. The Lyapunov stability theorem demands that the(More)
In order to improve the system's response speed, this paper first researched the influence of the parameters of the nonlinear switching manifolds on the system, then made an investigation on existence condition and hitting condition. Based on these conditions, a novel fast adaptive terminal sliding mode (ATSM) control scheme was proposed, which combined the(More)
In this article, we prepared a dual thermoresponsive and pH-responsive self-assembled micellar nanogel for anticancer drug delivery by using a degradable pH-responsive ketal derivative, mPEG2000-Isopropylideneglycerol (mPEG-IS, PI) polymer. The purpose of this study is to develop an injectable dual-responsive micellar nanogel system which has a sol-gel(More)
A new intelligent global terminal backstepping design method is proposed for a class of high-supersonic missiles. It has several advantages as follows. Firstly, the differential bomb problem is avoided because of the no time derivative design concept. So the control law is simplified and the system becomes more stable and robust. Secondly, by adopting the(More)
A design method of block diagonal controller is presented for a nonlinear cross beam experiment system. The nonlinear mathematical model of a cross beam experiment system is established at first. Based on the theory of exact linearization via feedback, a design method of block diagonal controller composed of inverse solution is presented. A block diagonal(More)
Considered both the situation with unknown control function matrices and the situation with linear unmodeled input dynamics, adaptive neural robust controller was designed by using adaptive backstepping method for a class of multi-input to multi-output nonlinear systems which could be turned to "standard block control type". Furthermore, it is possible to(More)