Fault-tolerant dynamic control for underactuated manipulators

Author(s):  
M.C. Ramos ◽  
A.J. Koivo
2020 ◽  
Vol 43 (9) ◽  
pp. 1764-1771
Author(s):  
Yajie Ma ◽  
Bin Jiang ◽  
Gang Tao ◽  
Hamed Badihi

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 157909-157921 ◽  
Author(s):  
Xiaolong Zhang ◽  
Yuanlong Xie ◽  
Liquan Jiang ◽  
Gen Li ◽  
Jie Meng ◽  
...  

2017 ◽  
Vol 121 (1237) ◽  
pp. 341-371 ◽  
Author(s):  
S. H. Almutairi ◽  
N. Aouf

ABSTRACTIn this paper, the development of a fault-tolerant control system for an aircraft that exploits both the hardware and analytical redundancy in the system is considered. A control allocation approach is developed where the total control command is computed and distributed among the available control surfaces. The actuator’s position and rate limits are taken into account in the optimisation problem. Existing fault-tolerant control allocation techniques produce look-up tables of control gains based on certain faults in the model. In contrast, the developed reconfigurable approach presented here incorporates a new process that redistributes control efforts which is updated whenever a fault occurs. In order to correlate between control effort redistribution and the fault magnitude, a fuzzy logic scheme is implemented, which handles a wide range of fault magnitudes on-line. The approach is applied for the most severe type of fault, which is the “lock-in-place” (jam) fault. Results show that the developed approach successfully handles the faulty situations and enhances aircraft flying responses by utilising the available healthy controls.


Electronics ◽  
2021 ◽  
Vol 10 (17) ◽  
pp. 2120
Author(s):  
Olivier Sename

This paper presents a detailed literature review about Linear Parameter Varying (LPV) approaches applied to vehicle suspension systems. Indeed many works have been devoted to vehicle (active and semi-active) suspension in the past 20 years, because this subsystem in the only one affecting passenger comfort and road holding. Moreover several studies have also been concerned with global vehicle dynamic control using the suspension systems in collaboration with other subsystems (steering, braking …). On the other hand, the LPV approaches have proved to be very efficient to control non linear systems as well as to provide some kind of adaptive control. Naturally many LPV methods have been developed for suspension systems in order to take into account the nonlinear characteristics of the dampers, to adapt the suspension performance to the passenger request or to the road profile, to make the suspension systems collaborate with other subsystems, or to provide a fault tolerant control in case of damper loss of efficiency. This survey paper will make a deep analysis about the recent studies dedicated to vehicle suspension systems aiming at providing a better insight on the type of LPV methods that have been considered.


Author(s):  
JIN-ZHUANG XIAO ◽  
HONG-RUI WANG ◽  
HONG-BIN WANG

Considering the decreasing performance of robotic systems under the constraints of actuators, this paper concludes the rules of dynamic control process and extracts the knowledge of optimizing the output of robotic controller based on the analysis of a Lyapunov function. Then fuzzy rules are used to express the knowledge and embedded in the controller to direct the dynamic control process. Under this controller, the systemic requirement of high-level outputs of the actuators is limited to a great extent, at the same time the convergent performance is optimized by a fuzzy-sets method from which the saturated fault tolerant control is realized in robotic manipulators. Simulating results on a 2-DOF robot validate the effectiveness of the given controller.


Sign in / Sign up

Export Citation Format

Share Document