scholarly journals Dynamic Brake Control for a Wearable Impulsive Force Display by a String and a Brake System

2021 ◽  
Vol 33 (5) ◽  
pp. 1075-1081
Author(s):  
Satoshi Saga ◽  
◽  
Naoto Ikeda
Keyword(s):  
Virtual Reality ◽  
Quantitative Evaluation ◽  
Dynamic Control ◽  
Brake System ◽  
Impulsive Force ◽  
Haptic Display ◽  
Braking System ◽  
Haptic Displays ◽  
Reaction Forces

In recent years, it has become possible to experience sports in the virtual reality (VR) space. Although many haptic displays in the VR environment currently use vibrators as the mainstream, the vibrators’ presentation is not suitable to express ball-receiving in the VR sports experience. Therefore, we have developed a novel haptic display that reproduces an impulsive force by instantaneously applying traction to the palm using a string and wearable brake system. This paper proposes a method to present various reaction forces by dynamic control of the braking system and report the quantitative evaluation of the device’s physical and psychological usability.

scholarly journals Three-Axis Pneumatic Haptic Display for the Mechanical and Thermal Stimulation of a Human Finger Pad

Actuators ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 60
Author(s):  
Eun-Hyuk Lee ◽  
Sang-Hoon Kim ◽  
Kwang-Seok Yun
Keyword(s):  
Pulse Width Modulation ◽  
Haptic Feedback ◽  
Control Function ◽  
Lateral Displacement ◽  
Gain Control ◽  
Haptic Display ◽  
Positional Accuracy ◽  
Control Module ◽  
Haptic Displays ◽  
Human Finger

Haptic displays have been developed to provide operators with rich tactile information using simple structures. In this study, a three-axis tactile actuator capable of thermal display was developed to deliver tactile senses more realistically and intuitively. The proposed haptic display uses pneumatic pressure to provide shear and normal tactile pressure through an inflation of the balloons inherent in the device. The device provides a lateral displacement of ±1.5 mm for shear haptic feedback and a vertical inflation of the balloon of up to 3.7 mm for normal haptic feedback. It is designed to deliver thermal feedback to the operator through the attachment of a heater to the finger stage of the device, in addition to mechanical haptic feedback. A custom-designed control module is employed to generate appropriate haptic feedback by computing signals from sensors or control computers. This control module has a manual gain control function to compensate for the force exerted on the device by the user’s fingers. Experimental results showed that it could improve the positional accuracy and linearity of the device and minimize hysteresis phenomena. The temperature of the device could be controlled by a pulse-width modulation signal from room temperature to 90 °C. Psychophysical experiments show that cognitive accuracy is affected by gain, and temperature is not significantly affected.

Lyapunov-stable control of mechatronic systems

2005 ◽  
Vol 219 (2) ◽  
pp. 173-185 ◽  
Author(s):  
O Enge ◽  
P Maißer
Keyword(s):  
Inverse Dynamics ◽  
Dynamic Control ◽  
Linear Feedback ◽  
Mechatronic Systems ◽  
Electromechanical Systems ◽  
Starting Point ◽  
Reaction Forces ◽  
The Stability ◽  
Lagrange Formalism ◽  
Stable Control

In this paper, a method for controlling mechatronic systems using inverse dynamics is proposed. The starting point is a unified mathematical approach to modelling electromechanical systems based on Lagrange formalism. This mathematical theory is used to represent such systems taking into account all interactions between their substructures. The concept of Lagrange formalism for electromechanical systems is given and the complete governing equations are presented. The Voronetz equations of a partially kinematically controlled electromechanical system (EMS) are derived. The corresponding reaction forces and voltages following from the Voronetz equations are determined. Using these reactions with small modifications, a so-called ‘augmented proportional-derivative (PD) dynamic control law’ is generated. This controller consists of a non-linear feedforward - based on inverse dynamics - and a linear feedback. The stability of the controller is proved using a Lyapunov function. The controller can also be applied to pure multibody systems or a sheer electrical system, both of which are borderline cases of mechatronic systems.

Master cylinder pressure reduction logic for cooperative work between electro-hydraulic brake system and anti-lock braking system based on speed servo system

2020 ◽  
Vol 234 (13) ◽  
pp. 3042-3055
Author(s):  
Lu Xiong ◽  
Wei Han ◽  
Zhuoping Yu ◽  
Jian Lin ◽  
Songyun Xu
Keyword(s):  
Feedback Control ◽  
Closed Loop ◽  
Servo System ◽  
Brake System ◽  
Extreme Condition ◽  
Pressure Reduction ◽  
Cylinder Pressure ◽  
Master Cylinder ◽  
Braking System ◽  
Hydraulic Brake

As one feasible solution of brake-by-wire systems, electro-hydraulic brake system has been made available into production recently. Electro-hydraulic brake system must work cooperatively with the hydraulic control unit of anti-lock braking system. Due to the mechanical configuration involving electric motor + reduction gear, the electro-hydraulic brake system could be stiffer in contrast to a conventional vacuum booster. That is to say, higher pressure peaks and pressure oscillation could occur during an active anti-lock braking system control. Actually, however, electro-hydraulic brake system and anti-lock braking system are produced by different suppliers considering brake systems already in production. Limited signals and operations of anti-lock braking system could be provided to the supplier of electro-hydraulic brake system. In this work, a master cylinder pressure reduction logic is designed based on speed servo system for active pressure modulation of electro-hydraulic brake system under the anti-lock braking system–triggered situation. The pressure reduction logic comprises of model-based friction compensation, feedforward and double closed-loop feedback control. The pressure closed-loop is designed as the outer loop, and the motor rotation speed closed-loop is drawn into the inner loop of feedback control. The effectiveness of the proposed controller is validated by vehicle experiment in typical braking situations. The results show that the controller remains stable against parameter uncertainties in extreme condition such as low temperature and mismatch of friction model. In contrast to the previous methods, the comparison results display the improved dynamic cooperative performance of electro-hydraulic brake system and anti-lock braking system and robustness.

scholarly journals Haptic display for virtual reality: progress and challenges

2019 ◽  
Vol 1 (2) ◽  
pp. 136-162 ◽  
Author(s):  
Dangxiao WANG ◽  
Yuan GUO ◽  
Shiyi LIU ◽  
Yuru ZHANG ◽  
Weiliang XU ◽  
...  
Keyword(s):  
Virtual Reality ◽  
Haptic Display

Study and Application of Electronic Technology in Automobile Brake System

2014 ◽  
Vol 1049-1050 ◽  
pp. 646-648
Author(s):  
Xiao Ling Mo
Keyword(s):  
Rapid Development ◽  
Present Situation ◽  
Brake System ◽  
Electronic Technology ◽  
Braking System ◽  
Vehicle Technology ◽  
Vehicle Security

Vehicle braking system in vehicle security plays an important role.In recent years, with the progress of vehicle technology and improvement of the car speed, the rapid development of electronic technology provides a more broad space of development to the braking system. Based on the use of electronic technology in automobile braking system present situation as the research object, the application of electronic technology in automobile braking system has carried on the detailed exploration and research, to promote the further study of electronic technology in automobile braking system and the application.

Design of a New Crawler Chassis Brake System

2014 ◽  
Vol 635-637 ◽  
pp. 1224-1227
Author(s):  
Xiao Rong Lü ◽  
Xiao Lian Lü
Keyword(s):  
Walking Speed ◽  
Brake System ◽  
Light Weight ◽  
Compact Structure ◽  
Braking System ◽  
Slow Walking ◽  
New Type ◽  
Structure Light ◽  
Slow Walking Speed ◽  
Speed Characteristic

This paper designs a new type of the crawler chassis brake system, which is suitable for crawler travel system slow walking speed. Characteristic of braking system has simple and compact structure, light weight, flexible use, convenient assembly and disassembly, large braking force, good braking effect, etc., can solve small crawler chassis brake problem very well.

Design and Application of Electromechanical Brake System

2014 ◽  
Vol 705 ◽  
pp. 152-156 ◽  
Author(s):  
Xiao Mei Liao
Keyword(s):  
Brake System ◽  
Electrical Machine ◽  
System Software ◽  
Fluid System ◽  
Brake Fluid ◽  
Braking System ◽  
Electromechanical Brake ◽  
Design And Application

Aim at the brake fluid system cannot protect the automobile security effectively, this article analyzes the electromechanical brake system in details. At first, it introduces the theory and the advantage composition of the electromechanical brake system. Then, this article introduces the hardware of EBS system and evaluates the design of EMB electrical machine and electron pedal. At last, it particularly analyzes the system software. This article has significant meaning to the automobile maintainers and the braking system researchers.

Sign in / Sign up

Export Citation Format

Share Document