Research On Horizon Channel Control Techniques For The Laser Gyro Compass

At present,the domestic laser gyro technology has become increasingly mature,the application of laser gyro is becoming more and more widely.Laser gyro compass as a relatively inexpensive,moderate precision navigation equipment,receives considerable attention in the field of navigation.The research and verification on horizon channel control technology which is one of the key technologies for development and realization of laser gyro compass had been done in this paper.The research started from the traditional horizon alignment and found some disadvantages of horizon control technology at present.In order to solve these problems,the horizon alignment methods were proposed,in which external velocity was introduced for compensation and control parameters were hierarchical and graduated.Multi-level damping coefficient inertial navigation system was designed to adapt to the different sea state to ensure the navigation precision.(1)There commonly used horizon alignment methods were researched,which were analytic coarse alignment,two-order horizon alignment and inertial navigation system coarse alignment.And researched the adaptability to the static base,rocking base and moving base through simulation experiments.(2)In order to overcome the influence of maneuvering motion on the horizon alignment,a new horizon alignment method was proposed,in which external velocity was introduced into the horizon alignment system for compensation.And the effectiveness of this method was confirmed through simulation experiments.(3)In order to overcome the influence of swing acceleration on the horizontal alignment,a new horizon alignment method was proposed,in which the control parameters of the alignment system were hierarchical and graduated.And a two-hierarchy of two-order horizon alignment was designed to solve the contradiction between the horizontal alignment time and the degree of influence brought by swing swinging environment.And in order to restrain the parameter switching error,the parameters were graduated.And the results of the simulation experiments showed that the two-hierarchy of two-order horizon alignment with graduated parameters was feasible.(4)Analyzed the necessity of introducing the horizontal damping network into inertial navigation system.Designed a multi-level damping coefficient inertial navigation system whose damping coefficient respectively are ξ = 0.5、ξ = 0.4、ξ = 0.25 and ξ = 0.1.And introduced the external velocity to restrain the damping coefficient switching error.The finalsimulation experiments results showed that each of the horizontal damping network were appropriate and the method introducing the external velocity into the system was effective to restrain the damping coefficient switching error.In this paper,lots of research on horizon channel control technology of laser gyro compass has been done,and the results of simulation show that the proposed methods are correct and implementation,with a view to the certain reference function for the development and experiment of the laser gyro.