Journal of Systems Engineering and Electronics ›› 2019, Vol. 30 ›› Issue (1): 180-190.doi: 10.21629/JSEE.2019.01.17

• Control Theory and Application • Previous Articles     Next Articles

Analysis of an improved trajectory correction scheme based on mass blocks

Xiaoyun LEI(), Zhian ZHANG*(), Zhonghua DU()   

  • Received:2017-10-18 Online:2019-02-27 Published:2019-02-27
  • Contact: Zhian ZHANG E-mail:lxyray@126.com;zzayoyo@163.com;duzhonghua@aliyun.com
  • About author:LEI Xiaoyun was born in 1990. She is a Ph.D. candidate in Nanjing University of Science and Technology. In 2014, she got her B.S. degree from Nanjing University of Science and Technology. In 2016, she got her M.S. degree and has been a Ph.D. candidate in the major of artillery, automatic gun and ammunition. Her research interests are intelligent ammunition and control of air vehicle and intelligent algorithms. E-mail:lxyray@126.com|ZHANG Zhian was born in 1979. He was an engineering doctor of mechanical engineering. He received his Ph.D. degree from Nanjing University of Science and Technology, Nanjing, China, in 2005. Now, he is an associate professor, a doctor/master graduate student tutor in Nanjing University of Science and Technology. His research interests are intelligent ammunition, control of air vehicle and machinery and electronics. E-mail:zzayoyo@163.com|DU Zhanghua was born in 1971. He has published a number of academic papers in Engineering Index (EI) and Science Citation Index (SCI) journals. He successively presided over complete postdoctoral fund in China. As a technical director, he successively participated in national, provincial and lateral projects. Now, he is a professor, a doctor/master graduate student tutor in Nanjing University of Science and Technology. His research interests are intelligent ammunition, control of air vehicle, machinery and electronics, new conceptual ammunition and defence technology. E-mail:duzhonghua@aliyun.com
  • Supported by:
    the National Natural Science Foundation of China(11372142);This work was supported by the National Natural Science Foundation of China (11372142)

Abstract:

In conventional technical trajectory correction schemes, continuous attitude adjusting mechanisms, such as canards, are inferior in terms of response time and efficiency of executing instructions. Discontinuous attitude adjusting mechanisms, such as the lateral pulse jet, have complex impact on the airflow layer of the projectile surface caused by the thrust vector jet flow. An improved two-dimensional trajectory correction mechanism is designed based on the principle of firing mass blocks by a tailor-made propellant. The mechanical properties of the thrust force (namely the correction force) is analyzed. The trajectory correction model is established to analyze the effects of correction starting moment and correction phase angle of a thrust force on the projectile's trajectory. According to the trajectory correction scheme, an improved genetic algorithm is employed to this work. The scheme is tested in the simulation. The results show that the correction scheme is effective to reduce target dispersion and increase the precision of the impact point.

Key words: trajectory correction, mass block, correction force, correction control algorithm, genetic algorithm