| "Communications on the Move" has strong anti-interference,strong security and long transmission distances; meanwhile, it has flexible characteristics and can quickly establish a connection.So that in the military and civilian areas, it has been widely used. Antenna control system is an important part of "Communications on the Move", it mainly be used to adjust the antenna accurately track the satellite signal and ensure that "Communications on the Move" works normally.The objective of this paper is to design a antenna control system for a kind of portable flat "Communications on the Move". This paper starts from the principle of "Communications on the Move", comblined with performance requirement, analysis software needs and hardware needsThe Keystone of this paper lies in investigating the hardware design and software design. And put forward a hardware structure of the system.on this basis,then complete selections of ARM chip and corresponding peripheral devices.design the peripheral circuit and analyze the function module circuit..put forward the software design by usingμ. C/OS-Ⅱoperating system transplant.Through the research of the rules of writing application software in theμC/OS-Ⅱoperating system.give task planning and priority setting of the antenna control software.thus complete the software design.The antenna attitude controller uses neural network adaptive controller,combined with PD(percentage differential) controller.the design is different from the general design which used traditional PID(percentage differential integral) controller.it uses the self-organizing,self-study ability of neural network to make up for the lack of PID controller.at the same time, through analysis in theory and the data processing, further optimize performance of the controller.In order to confirm the performance,the paper also uses tools of simulink to establish the model of Antenna attitude and does simulation experiments. |
