Hydraulic Brake Pedal Feedback for Realistic ABS Simulation
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Solution Overview
Problem
Existing driving simulators fail to realistically simulate the tactile feedback of an automobile brake pedal, particularly during Anti-Lock Brake System (ABS) activation, leading to a suboptimal training experience.
Innovation Solution
A hydraulic brake system for driving simulators that includes a master and slave cylinder chamber connected via a hydraulic system, with a pressure module that intermittently alters pressure to mimic the vibratory pulsation of an ABS system, using solenoid valves and a pump to create life-like tactile feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single solenoid is used to generate brake pedal vibrations during ABS activation, then the system complexity is reduced, but the realism of tactile feedback deteriorates
Solution Approach 1:
The brake system is divided into two independent hydraulic circuits: a master cylinder circuit that responds to pedal input, and a slave cylinder circuit that generates ABS feedback vibrations. This segmentation allows each circuit to perform its specific function optimally without interfering with the other, achieving realistic tactile feedback while maintaining system manageability
Solution Approach 2:
A dual-piston slave cylinder is introduced as an intermediary component between the hydraulic system and the brake pedal. The slave cylinder receives hydraulic pressure independently and translates it into realistic pedal vibrations, mediating between the electronic ABS control and the user's tactile sensation to achieve authentic feedback
2Ease of manufacture
If the brake system uses a simple mechanical vibration mechanism, then the ease of manufacture is improved, but the accuracy of ABS simulation deteriorates
Solution Approach 1:
The system uses hydraulic pressure control instead of simple mechanical vibration mechanisms. The dual-piston slave cylinder utilizes hydraulic fluid to generate realistic pedal vibrations that accurately replicate ABS pulsation characteristics, achieving high simulation accuracy through fluid dynamics rather than mechanical means
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides a realistic simulation of brake pedal feedback, including ABS activation, enhancing the training experience by closely approximating the feel of a real automobile brake pedal.
Implementation Method 1
a master cylinder chamber and a slave cylinder chamber, which are in fluid communication via a hydraulic system
Implementation Method 2
The pressure system is adapted to intermittently increase and decrease the pressure in said hydraulic system such that tactile feedback is provided to said brake pedal
Data Source
AI summary
A brake system for a driving simulator, the brake system comprising a master cylinder chamber and a slave cylinder chamber which are arranged in fluid communication via a hydraulic system. The master cylinder chamber comprising a master cylinder piston which is mechanically connected to a brake pedal such that movement of the brake pedal results in translation of the master cylinder piston along the axis of said master cylinder chamber. The hydraulic system comprising a pressure module which is arranged such that it divides the hydraulic system into a master side in fluid communication with the master cylinder chamber and a slave side in fluid communication with the slave cylinder chamber. The pressure system is adapted to intermittently increase and decrease the pressure in the hydraulic system such that tactile feedback is provided to the brake pedal.