Dynamic modeling and control strategy for turning in place motion of a two-coaxial pendulums driven spherical inspector based on stick–slip principle

2015 ◽  
Vol 83 ◽  
pp. 69-80 ◽  
Author(s):  
Lei Wang ◽  
Bo Zhao
Keyword(s):  
Dynamic Modeling ◽  
Control Strategy ◽  
Stick Slip ◽  
Modeling And Control ◽  
And Control

Dynamic Modeling and Control of Flexible Hexapod Platform for Micro-Vibration Isolation and Precision Tracking

2014 ◽  
Vol 490-491 ◽  
pp. 412-420
Author(s):  
Ping Ping Wang ◽  
Lei Liu ◽  
Qiu Ru Qian
Keyword(s):  
Dynamic Modeling ◽  
Control Strategy ◽  
Vibration Isolation ◽  
Space Telescopes ◽  
Modeling And Control ◽  
Precision Tracking ◽  
And Performance ◽  
Micro Vibration ◽  
Ball Joints ◽  
And Control

Micro vibrations, produced by reaction flywheels, coolers, driving motors and other moving parts in spacecrafts, will result in jitters and performance degradation of sensitive optical payloads, such as laser communication platforms, space telescopes and staring cameras. In this paper, one hexapod platform with flexible ball joints is employed to suppress vibrations and steer the payload in 6-degree-of-freedom (DOF). At first, dynamic modeling of the flexible hexapod platform with two-stage hybrid isolation struts is derived. Then, a composite control strategy is proposed for vibration isolation and precision tracking. Finally, the simulation study is presented to validate the proposed control strategy.

scholarly journals A Switching System oriented Modeling and Control Strategy for Idle Speed Control of a Hybrid Powertrain

2020 ◽  
Vol 53 (2) ◽  
pp. 14028-14033
Author(s):  
Micha S. Obergfell ◽  
Steven X. Ding ◽  
Frank Wobbe ◽  
Christoph-Marian Goletz ◽  
Michael Folkers ◽  
...  
Keyword(s):  
Control Strategy ◽  
Speed Control ◽  
Switching System ◽  
Hybrid Powertrain ◽  
Modeling And Control ◽  
Idle Speed ◽  
Idle Speed Control ◽  
And Control

Biostability in distribution systems in one city in southern China: Characteristics, modeling and control strategy

2014 ◽  
Vol 26 (2) ◽  
pp. 323-331 ◽  
Author(s):  
Pinpin Lu ◽  
Xiaojian Zhang ◽  
Chiqian Zhang ◽  
Zhangbin Niu ◽  
Shuguang Xie ◽  
...  
Keyword(s):  
Control Strategy ◽  
Distribution Systems ◽  
Southern China ◽  
Modeling And Control ◽  
And Control

NEURAL MODELING AND CONTROL OF DYNAMIC SYSTEMS WITH HYSTERESIS

2007 ◽  
Vol 31 (1) ◽  
pp. 127-141
Author(s):  
Yonghong Tan ◽  
Xinlong Zhao
Keyword(s):  
Dynamic Systems ◽  
Control Strategy ◽  
Neural Modeling ◽  
Modeling And Control ◽  
Control Scheme ◽  
The Neural Networks ◽  
Adaptive Control Strategy ◽  
Set Up ◽  
Modeling Strategy ◽  
And Control

A hysteretic operator is proposed to set up an expanded input space so as to transform the multi-valued mapping of hysteresis to a one-to-one mapping so that the neural networks can be applied to model of the behavior of hysteresis. Based on the proposed neural modeling strategy for hysteresis, a pseudo control scheme is developed to handle the control of nonlinear dynamic systems with hysteresis. A neural estimator is constructed to predict the system residual so that it avoids constructing the inverse model of hysteresis. Thus, the control strategy can be used for the case where the output of hysteresis is unmeasurable directly. Then, the corresponding adaptive control strategy is presented. The application of the novel modeling approach to hysteresis in a piezoelectric actuator is illustrated. Then a numerical example of using the proposed control strategy for a nonlinear system with hysteresis is presented.

Modeling and Control Strategy Simulation of Dual Active Bridge DC-DC Converter

2021 ◽  
Author(s):  
Youjie Ma ◽  
Hongyu Wen ◽  
Xuesong Zhou ◽  
Jie Yin
Keyword(s):  
Control Strategy ◽  
Modeling And Control ◽  
Dual Active Bridge ◽  
And Control

Riccati Discrete Time Transfer Matrix Method for Dynamic Modeling and Simulation of an Underwater Towed System

2012 ◽  
Vol 79 (4) ◽  
Author(s):  
Guoping Wang ◽  
Bao Rong ◽  
Ling Tao ◽  
Xiaoting Rui
Keyword(s):  
Modeling And Simulation ◽  
Dynamic Modeling ◽  
Computational Efficiency ◽  
Finite Segment ◽  
Modeling And Control ◽  
Global Dynamic ◽  
Transfer Equations ◽  
High Matrix ◽  
Towed Cable ◽  
And Control

Efficient, precise dynamic modeling and control of complex underwater towed systems has become a research focus in the field of multibody dynamics. In this paper, based on finite segment model of cable, by defining the new state vectors and deducing the new transfer equations of underwater towed systems, a new highly efficient method for dynamic modeling and simulation of underwater towed systems is presented and the pay-out/reel-in process of towed cable is studied. The computational efficiency and numerical stability of the proposed method are discussed. When using the method to study the dynamics of underwater towed systems, it avoids the global dynamic equations of system, and simplifies solving procedure. Irrespective of the degree of freedom of underwater towed system, the matrices involved in the proposed method are always very small, which greatly improve the computational efficiency and avoids the computing difficulties caused by too high matrix orders for complex underwater towed systems. Formulations of the method as well as numerical simulations are given to validate the proposed method.

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