Nutation Testing Technology Of Rotating Projectile Without Control Research Based On Thin Film Coil

Noncontrol rotating projectile is refers to the steering gear and the engine implementation guidance projectile flight control,and in the process of flying around their own longitudinal axis continuous roll of conventional projectile.Projectile nutation parameters is rotating cylinder flight dynamic stability design need to first consider one of the problems,if the rotation of the projectile in flight nutation Angle is unusual,light weaken its lighter performance,or lead to nearly play,even the way out to play.This topic closely with rotating projectile design practice needs,relying on the ammunition storage testing technology,without control and rotation of the projectile outside ballistic initial proposed a moderate precision,convenient use,low cost of testing methods,this method is based on the thin film coil of the projectile of the radial magnetic field information,according to the projectile vertical axis relative to the carrier for calculating magnetic field to establish the relative movement between the good model,calculated without control rotating projectile just out of the muzzle over a period of nutation and calculated through a certain live shooting range test trial outside the projectile ballistic projectile nutation letter,early results show that this design of nutation test method for no rotating projectile nutation control test has certain reference significance.To attribute the this article main research content is as follows:(1)Detailed introduces the related basic theory of the testing system,film coil testing principle,the magnetic field theory and the influence of projectile shell materials for magnetic survey analysis.Expounds the relation between magnetic field measurement calibration model,the coordinate transformation and envelope film coil magnetic field information theory foundation,illustrates the film coil based projectile nutation decoding process,and on the basis of thin film magnetic field,coil induction electromotive force and the carrier of the projectile nutation calculating model.(2)According to the test principle and the characteristics of the test environment,make sure the test scheme based on thin film coil and indicators,the recorder of hardware,software and the mechanical structure design in detail,and the laboratory simulation experiment was carried out on the recorder.(3)Recorder in shooting range live-fire test data for the analysis and calculation,the radial magnetic field information of the projectile into the nutation calculating model,finally obtained the projectile the muzzle nutation changes over a period of time,and then verify the feasibility of this test method.