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Lan X.Y.,Shenyang Aerospace University | Guan Q.Y.,Shenyang Aerospace University | Zou Y.,Army
Applied Mechanics and Materials | Year: 2014

It is known that computational complexity of the propagator method (PM) can be significantly smaller than those of MUSIC and ESPRIT because the PM does not require any eigenvalue decomposition (EVD) of the received data. However, most the algorithm based on PM requires more antenna elements than targets. In order to solve these issues, a novel low energy algorithm utilizing array base-line rotation for multiple targets estimation is proposed. By rotating two elements and setting a fixed time delay, even number of elements is selected to form a virtual UCA. Then, the received data of signals will be sampled at multiple positions, which improves the array elements utilization greatly. Simulations results verified the effectiveness of the proposed algorithm with high resolution and estimation accuracy performance. © (2014) Trans Tech Publications, Switzerland. Source


Dai Y.-L.,Wuhan Naval University of Engineering | Wang C.-H.,Army | Miao H.,Wuhan Naval University of Engineering | Liu Z.-Y.,Wuhan University of Technology
Chuan Bo Li Xue/Journal of Ship Mechanics | Year: 2011

The motion stability theory of a nonlinear system and the principles of continuation based on homotopy techniques were applied to stable state response and motion stability analysis of submarines during emergency ascent. The stability analysis results were verified by simulations using direct numerical integrations of the fully nonlinear, coupled six degrees-of-freedom equations of motion for the submarine. It indicates that homotopy and continuation theory techniques could be an effective analysis method for motion stability of submarines under water. Source


Dai Y.,Wuhan Naval University of Engineering | Wang C.,Army | Miao H.,Wuhan Naval University of Engineering | Liu Z.,Wuhan University of Technology
Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of Technology (Transportation Science and Engineering) | Year: 2010

In order to eliminate the effects of strong coupling between all dimensions of movements, severe nonlinearities and time-varying characteristics, a sliding mode fuzzy controller for a submarine during emergency ascent was developed in this paper. A novel multivariate sliding mode fuzzy grey predictive controller was also proposed in order to compensate the delay of the actuators such as rudder, drainage and the pneumatic blowing system. The simulation results show that the control approach not only remains robustness of sliding mode control, but also avoids the effects of chattering phenomenon, and possess better performance of the system. The stability and robustness of the system are good. Source


Cheng J.-X.,Beijing Qinghe Building Number 8 | Zhu W.-K.,Beijing Qinghe Building Number 8 | Hu Y.-X.,Beijing Qinghe Building Number 8 | Chen J.,Beijing Qinghe Building Number 8 | And 4 more authors.
Hedianzixue Yu Tance Jishu/Nuclear Electronics and Detection Technology | Year: 2010

It introduces the important meaning of the application of grey relational analysis on the monitoring point optimization of radiation background survey. It gives out the grey relational analysis theory. It also quotes some background survey results to demonstrate the method. The examples prove that this method has feasibility in the monitoring point optimization of radiation background survey. Source


Dai Y.,Wuhan Naval University of Engineering | Kong Q.,Wuhan Naval University of Engineering | Huang W.,Wuhan Naval University of Engineering | Wang C.,Army | Zhu Y.,Hunan University of Technology
Chinese Control Conference, CCC | Year: 2013

In this paper the HLA (High Level Architecture) simulation techniques were used to design the simulation system of marine power plants. A kind of hierarchical system structure was proposed so as to separate the application layer from RTI (Runtime Infrastructure). Hence the developed simulation application is plug and play. The reusability and interoperability of simulation application is fulfilled. There is a study of key technologies such as composition and development process of federation based on FEDEP (Federation Development and Execution Process) model. A prototype of the simulation system of marine power plants was presented. The simulation results show that the presented procedure is valid. © 2013 TCCT, CAA. Source

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