Research On Millimeter-Wave Remote Control Trajectory Correction Munition

Trajectory Correction Munition (TCM) is a kind of low cost artillery shell with highprecision, which corrects its trajectory with several discontinuously adjusting to minimizeits fire error. As a realization mode for TCM, comparing with the GPS TCM and MIMUinertia guiding TCM, remote control TCM has the advantages in structure complicacy, manufacture cost, tactical adaptability, shooting precision and realization feasibility, etc. Asthe carder wave for remote control signal of munition, millimeter wave (MMW) has thecharacteristic of long effective distance, strong anti-jamming ability, small volume andanti-smoke of battlefield. MMW is the ideal carrier wave of remote control signal.The emphases of this thesis are the key sustain technology of MMW-TCTCMincluding of system construction, signal transmission, exterior ballistics computation, anti-missile application for naval gun, burst point control, etc. The work of the whole thesismainly include the following items:1. The characteristics of the TCM are analyzed in the first chapter. Then, all kinds ofthe TCM developed by most countries are introduced. The developing way of TCM bychina is proposed according to the developing experience and course of the home andaboard.2. The system construction of the MMW-RCTCM is proposed in the second chapter.The selection of carrier wave, the fabrication of millimeter wave signal transmitter, thefabrication of shell-borne receiver, signal modulation and demodulation, the information ofprojectile-target, command forming and construction of correction implement mechanismare analyzed in detail. The feasibility on effective distance of MMW signal when shootingat the target with long distance and the correction ability when shooting at the mobilecruise missile are investigated.3. The spreading characteristics on curved and flat trajectory are researched in detailin the third chapter. The channel parameter of the two kinds of trajectories of MMWremote control signal is obtained by computer numerical simulation. The data transmissionBER (Bit Error Rate) of DBPSK signal is simulated too based on the above simulationresults. The channel Rice K factor will be lower and the BER will be higher on curvedtrajectory than that on flat trajectory because of the strong reflection of MMW signal onwater surface and the moving receiver with high speed. For the above reason, the pseudorandom interleaving scheme for convolutional code with Rician distribution is suggestedsubsequently to making the random interleaving degree fitting the burst code error length of Rice channel. By comparing method, it is proved that this scheme is better than theinterleaving scheme with uniform distribution interleaving degree and changelessinterleaving degree.4. An optimal predicting model for the exterior ballistics of trajectory correctionprojectile based on the estimation of ballistic perturbing noise is established in the fourthchapter. The ballistic estimation algorithm of measured section of trajectory is amendedbased on the estimation result of trajectory perturbing noise. The computing scale isreduced and the predicting precision of non-measured section is improved. Then, the lastterminal trajectory characteristic is analyzed in detail. It is concluded that the longitudinalvelocity of terminal trajectory is linear with flight time and the dumper action time arequadratic with correction distance. A fast convergent algorithm for deciding thedeployment time of damper for range correction projectile is suggested. The correctnessand feasibility are testified by the emulation output.5. The influence of impulse engine start parameter for correction is acquired bysimulation based on the exterior trajectory module of impulse TCM in the fifth chapter.The correction module of the side direction impulse TCM is summed based on the abovesimulation results. Then, the interception policy to mobile anti-ship missile for RCTCM isproposed. The attack and defense simulation model of mobile target flow and remotecontrol interception flow is established for evaluating the validity of TCM when shootingat the air target. The hit probabilities of TCM in versatile scenario are analyzed in detail. Itis proved that the RCTCM can resist the strong attacking of ultrasonic anti-ship cruisemissile with high mobility.6. The concept of "GIF" and "Fuse-warhead Coordination" which used in anti-airmissile are introduced into the precession of interception of RCTCM. Thus, the concept of"Remote Control Correction and Fuse Coordination" is proposed in chapter six. Therealization principle is suggested. The technical meaning in three hierarchy of thuscoordination is analyzed. Then, the computation method of best burst point, which used theinformation of project-target encounter, is proposed. At the last, the realization policy ofthe coordination of impulse RCTCM is put forward.