Two-stage cooperative guidance strategy using a prescribed-time optimal consensus method

A novel cooperative guidance scenario is proposed that implements fire-and-forget attacks for seeker-less missiles with a cheap finder for stationary targets and without requiring real-time communication among missiles or precise position information. Within the proposed cooperative scenario, the classic leader-follower framework is utilized, and a two-stage cooperative guidance law is derived for the seeker-less missile. Linear-quadratic optimal control and biased proportional navigation guidance (PNG) are employed to develop this two-stage cooperative guidance law to minimize the control cost in the first stage and to reduce the maximum acceleration command in the second stage when the acceleration command is continuous. Simulations and comparisons are conducted that demonstrate the effectiveness and advantages of the proposed guidance law.

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Robust Tracking for Uncertain Flexible Structures Using Mixed Time-Optimal and Sliding Mode Control

Volume 1C: 16th Biennial Conference on Mechanical Vibration and Noise ◽

10.1115/detc97/vib-3777 ◽

1997 ◽

Author(s):

Nader Jalili ◽

Nejat Olgac

Keyword(s):

Robust Control ◽

Sliding Mode Control ◽

Sliding Mode ◽

Flexible Structures ◽

Body Motion ◽

Flexible Beam ◽

Two Stage ◽

Mass System ◽

Mode Control ◽

Time Optimal

Abstract An improvement step in robust control is studied for uncertain (linear or nonlinear) systems. The proposed two-stage control scheme first modifies the original desired trajectory, and then imposes robustness against uncertainties in tracking this modified trajectory. For the trajectory modification stage, a simple scheme is considered : time optimal-rigid body motion (TO). The robustness stage is performed using Sliding Mode Control with Perturbation Estimation (SMCPE), an advanced form of SMC. This routine brings some strong features as demonstrated by examples. A rotating hub with flexible beam attachment is taken as the first example, and an undercontrolled two-mass system with a linear spring as the second. The comparative studies show superior results for the combination of TO-SMCPE over the basic SMCPE. Moreover, this two-stage control exhibits stable and highly advantages performance even for cases where H∞-type of robust control structure is declared unstable by earlier investigations.

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A two-stage consensus method for large-scale multi-attribute group decision making with an application to earthquake shelter selection

Computers & Industrial Engineering ◽

10.1016/j.cie.2017.11.025 ◽

2018 ◽

Vol 116 ◽

pp. 113-129 ◽

Cited By ~ 91

Author(s):

Yejun Xu ◽

Xiaowei Wen ◽

Wancheng Zhang

Keyword(s):

Decision Making ◽

Group Decision Making ◽

Large Scale ◽

Group Decision ◽

Consensus Method ◽

Two Stage ◽

Shelter Selection

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Multiple-constraint cooperative guidance based on two-stage sequential convex programming

Chinese Journal of Aeronautics ◽

10.1016/j.cja.2019.07.026 ◽

2020 ◽

Vol 33 (1) ◽

pp. 296-307 ◽

Cited By ~ 2

Author(s):

Wei DONG ◽

Qiuqiu WEN ◽

Qunli XIA ◽

Shengjiang YANG

Keyword(s):

Convex Programming ◽

Two Stage ◽

Sequential Convex Programming ◽

Multiple Constraint ◽

Cooperative Guidance

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Two-stage time-optimal formation reconfiguration strategy

Systems & Control Letters ◽

10.1016/j.sysconle.2013.02.001 ◽

2013 ◽

Vol 62 (6) ◽

pp. 496-502 ◽

Cited By ~ 3

Author(s):

Amir Ajorlou ◽

Kaveh Moezzi ◽

Amir G. Aghdam ◽

Sergey G. Nersesov

Keyword(s):

Two Stage ◽

Formation Reconfiguration ◽

Time Optimal

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Two-stage self-seeding method for preparation of single crystals of poly(phenylene sulfide)

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100153816 ◽

1989 ◽

Vol 47 ◽

pp. 368-369

Author(s):

Sengshiu Chung ◽

Peggy Cebe

Keyword(s):

Single Crystals ◽

High Performance ◽

Dilute Solution ◽

Two Stage ◽

Annealing Behavior ◽

High Performance Polymers ◽

Seeding Method ◽

Phenylene Sulfide

We are studying the crystallization and annealing behavior of high performance polymers, like poly(p-pheny1ene sulfide) PPS, and poly-(etheretherketone), PEEK. Our purpose is to determine whether PPS, which is similar in many ways to PEEK, undergoes reorganization during annealing. In an effort to address the issue of reorganization, we are studying solution grown single crystals of PPS as model materials.Observation of solution grown PPS crystals has been reported. Even from dilute solution, embrionic spherulites and aggregates were formed. We observe that these morphologies result when solutions containing uncrystallized polymer are cooled. To obtain samples of uniform single crystals, we have used two-stage self seeding and solution replacement techniques.

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