Closed loop control design for the sense mode of micromachined vibratory gyroscopes

2013 ◽  
Vol 56 (5) ◽  
pp. 1112-1118 ◽  
Author(s):  
ChunHua He ◽  
QianCheng Zhao ◽  
YuXian Liu ◽  
ZhenChuan Yang ◽  
GuiZhen Yan
Keyword(s):  
Closed Loop ◽  
Control Design ◽  
Closed Loop Control ◽  
Sense Mode ◽  
Loop Control ◽  
Vibratory Gyroscopes

scholarly journals Improvement of mechanical performance for vibratory microgyroscope based on sense mode closed-loop control

2013 ◽  
Vol 12 (2) ◽  
pp. 023001 ◽  
Author(s):  
Dingbang Xiao ◽  
Jianbin Su ◽  
Zhihua Chen ◽  
Zhanqiang Hou ◽  
Xinghua Wang ◽  
...  
Keyword(s):  
Closed Loop ◽  
Mechanical Performance ◽  
Closed Loop Control ◽  
Sense Mode ◽  
Loop Control

Closed-loop Control Design for a New Multi-input Multi-output DC/DC Converter

2021 ◽  
Author(s):  
Ran Li ◽  
Xinan Zhang ◽  
Herbert Iu ◽  
Tat Kei Chau ◽  
Yulin Liu
Keyword(s):  
Closed Loop ◽  
Control Design ◽  
Closed Loop Control ◽  
Loop Control

A Sub 0.8 Degree per Hour Mode-Matching MEMS Vibratory Gyroscope with Closed Loop Control for the Sense Mode

2013 ◽  
Vol 562-565 ◽  
pp. 260-264
Author(s):  
Chun Hua He ◽  
Qian Cheng Zhao ◽  
Da Chuan Liu ◽  
Zhen Chuan Yang ◽  
Gui Zhen Yan
Keyword(s):  
Closed Loop ◽  
Open Loop ◽  
Closed Loop Control ◽  
Mode Matching ◽  
Sense Mode ◽  
Loop Control ◽  
Vibratory Gyroscope ◽  
Closed Loop Control System ◽  
Loop Control System ◽  
Order Of Magnitude

A detailed analysis about the nonlinearity of a mode-matching MEMS vibratory gyroscope is presented in this paper, then closed loop control for the sense mode is adopted to improved the performances. Experimental results figure out that the mode-matching gyroscope with closed loop controlled sense mode achieves a scale factor of 65mV/deg/s with nonlinearity of 0.05% and asymmetry of 0.1%, and a bias instability of 0.77deg/h, while they are 60mV/deg/s, 1%, 4.6% and 9.8deg/h in the open loop controlled sense mode system, respectively. These performances can be improved by more than one order of magnitude in the closed loop control system.

Nonlinear Model-Based Controller Design for a Hydraulic Rack and Pinion Gear Actuator

2018 ◽  
Author(s):  
Pauli Mustalahti ◽  
Jouni Mattila
Keyword(s):  
Closed Loop ◽  
Controller Design ◽  
Dynamical Behavior ◽  
Control Design ◽  
Closed Loop Control ◽  
Loop Control ◽  
Hydraulic Manipulators ◽  
Pinion Gear ◽  
Hydraulic Manipulator ◽  
Heavy Loads

Hydraulic manipulators are extensively utilized to move heavy loads in many industrial tasks. In commercial applications, a manipulator base is required to rotate a motion range of the full 360°. This is usually implemented by using a hydraulic rack and pinion gear actuator. Due to the manipulator’s long reach and heavy loads, manipulator tip acceleration can produce significant torque to the rotation gear in free-space motion. Imposed by nonlinear dynamical behavior (involving, e.g., the gear backlash and actuator friction) added to high inertia, a system closed-loop control design becomes a challenging task. An advanced closed-loop control enables to increase the automation-level of hydraulic manipulators. This study designs a novel subsystem-dynamics-based controller for a hydraulic rack and pinion gear actuator utilizing the control design principles of the virtual decomposition control (VDC) approach. An adaptive backlash compensation is incorporated in the control design. Furthermore, the proposed controller is implemented in previously-designed state-of-the-art hydraulic manipulator control. The stability of the overall control design is proven. Experiments with a full-scale commercial hydraulic manipulator demonstrate the effectiveness of the proposed adaptive backlash compensation and the overall control performance.

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