| This paper gives a description of researches done in the important part of the Simulation of Multi Mode Marine Integrated Power System and Electric Propulsion System, which is supported by the Shanghai Science and Technology Development Fund. In the project, POD ship is adopted as a simulated object, and ARM+DSP embedded marine propulsion simulation platform is developed on the basis of dual three phase POD electric propulsion simulation system of "Hardware in Loop".This new type of simulation platform is developed mainly for the central part of the electric propulsion simulation system -propeller characterized subsystem. This subsystem aims at providing a real-time dynamic load(vessel-engine-propeller) characteristics for propulsion motor. This dynamic characteristics is carried out by motor whose controlling unit is composed of vessel-propeller mathematic model, and torque adjustment unit, etc. Because of the complexity of vessel-propeller mathematic model as well as the higher requirements for the real-time capacity and fidelity of the simulation, it is urgent to have a new type of high speed processing simulation platform.ARM+DSP embedded simulation system is developed to meet the above-mentioned requirements. The following is the works done by the author:(1)To start a new feasible research on the realization mode of ARM+DSP embedded simulation system, especially on the constitution of dual subsystem, the communication between the dual subsystems and the advantages of this simulation in accordance with the practical environment of the podded propulsion simulation system. A lot of related English documents has been read by the author. (2) To construct a simulation platform with the chip TMS320VC5470made by Tl as a nucleus; to design the hardware principle of the simulation platform and expand the extended RAM, ROM (Flash), man-machine interface, peripheral circuit, JTAG interface and communication interface with the regard to the characteristics of the chip VC5470.(3) To choose the components demanded by the hardware principle; to design 8 layers PCB, with emphasis laid on the rules of routing and the signal integrity in high-speed digital circuit and high-speed PCB design which gives a better solution to the high density routing of BGA package and it's EMI problem.(4) To realize the simultaneous simulation of the two subsystems after a series of debugging, and two phase system online simulation based on the preliminary work of designing and realization of simulation software in DSP subsystem; to explore the feasibility of the transplanting of embedded OS.Chapter 1 gives a brief introduction to the background of t his project; Chapter 2 explains electric propulsion vessel-engin e-propeller model simulation subsystem, control plan and conce ption of the simulation system; In chapter 3, the structural cha racteristics of ARM and DSP is compared and analyzed, and th e reason for the choice of VC5470 chip is given in detail; Chap ter 4 introduces the hardware designing principle of ARM+DSP embedded simulation system. The realization of the hardware s ystem is illustrated in chapter 5, with emphasis being laid on t he designing of multi-layer PCB and high-speed PCB signal int egrity method. Chapter 6 describes the communication mode be tween the two subsystems, as well as the designing and realiz ation of the software in DSP subsystem. The final chapter is a summary of the whole work, at the same time, the author's per sonal experience is given and prospect of this project is sugge sted.One of the innovations in this thesis is to construct a sim ulation platform with the use of two nucleus of ARM subsystem and DSP subsystem in order to carry out real-time simulatio n experiment on the load of propulsion motor (vessel-engine-pr opeller dynamic characteristics) and achieve the asynchronous motor torque control in the constitution of the whole system. I n addition, it is innovative to apply the configuration of ARM+D SP which is mainly used in speech and wireless data processin g... |
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