Design And Simulation Verification Of Four-rotor Aircraft Aerial Photography Control Systems

Quadrotor is a kind of realization of microcomputer.It has ability of independent flight and it is widely used in agriculture,meteorology and military and so on.In recent years,with the rising of new technologies such as aerial,this paper will use quadrotor as the aerial camera.They complete equiped with camera equipment.They complete the aerial work of camera equipment by controlling the speed and angle of the quadrotor.In this paper,FPGA voice recognition command as a the aerial remote control command of the quadortor.They combine the ability of FPGA fast dealing with information with voice control of simple,accurate and flexible features.The quadrotor control system is divided into two parts.The first part is to realize the main controller on the quadrotor.The fuzzy neural network PID control is used to control the flying height and direction of the rotor.And is combined with the hover assist controner.And realizes the control of the quadrotor aerial and hovering drift.The second part is the command system of voice remote control command with FPGA.They turn the voice recognition command into the command code,and then transfer to the quadrotor realized by FPGA,and the voice control command is converted into command code and transmitted to the four rotorcraft.Body of quadrotor must be equipped with camera.When equipment embedded in the quadrotor is aerialing.The hovering drift in the air of quadrotor will have a difference in the quality of the air.In this paper,the creately bring up "three-rotor yaw angle drift identification algorithm" and correct the excurison in the air of quadrotor.In the aspect of voice recognition,the aerial attitude iscompleted by the optimized hidden Markov model Command recognition,so that it can achieve the quadrotor real-time control requirements.In this paper,the application of FPGA technology,wireless transceiver technology,as well as in Matlab to achieve the simulation algorithm,and the use of Quartus II waveform simulation.Simulation of each module shows that the system has a strong real-time,system compatibility and algorithm operation can meet the system design requirements,can be a good realization of the quadrotor in the air of various flight attitude control and hover drift control,can accurately identify the voice command and can achieve the aerial image clear standard.