Driving Simulator Brake System With Hydraulic ABS Feedback
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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 an unrealistic training experience.
Innovation Solution
A hydraulic brake system with a pressure module that intermittently adjusts pressure in the hydraulic system to mimic the vibratory pulsation of a real brake pedal during ABS activation, using solenoid valves and a pump to create tactile feedback, and a pressure sensor to detect and communicate pressure changes.
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 mechanical system remains simple, but the tactile feedback realism deteriorates
Solution Approach 1:
The single solenoid vibration generation system is segmented into multiple independent solenoids (first solenoid and second solenoid) that act on different parts of the brake pedal assembly. The first solenoid generates vibrations in the brake pedal arm while the second solenoid generates vibrations in the brake pedal, creating a more realistic multi-point vibration pattern that mimics actual ABS behavior.
Solution Approach 2:
Different solenoids are positioned to apply vibrations to different locations of the brake pedal assembly. The first solenoid targets the brake pedal arm at a specific distance from the pivot axis, while the second solenoid targets the brake pedal itself, creating localized vibration zones that enhance the realism of the tactile feedback.
2Device complexity
If no pressure module is used in the hydraulic system, then the system remains simple, but the ability to provide tactile feedback deteriorates
Solution Approach 1:
The pressure module proactively generates pressure variations in the hydraulic system before and during brake pedal depression. The controller activates the pressure module to create pressure changes that correspond to the simulated ABS activation, ensuring that tactile feedback is available whenever braking is performed in the simulation.
Solution Approach 2:
A pressure module with hydraulic components (pump, valves, accumulator) is integrated into the hydraulic system to generate controlled pressure variations. The pump delivers hydraulic fluid to the master cylinder while valves control the timing and magnitude of pressure changes, creating realistic tactile feedback through hydraulic pressure modulation.
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
Provides a life-like tactile response to the brake pedal, enhancing the realism of the driving simulation and improving training effectiveness by simulating the feel of ABS braking.
Implementation Method 1
a brake pedal (101) that is connected to a brake cylinder (201)... A pressure module (301) is connected to said brake cylinder (201)... which may be in fluid communication with said master cylinder chamber (207)
Implementation Method 2
The brake system comprises a pressure module that intermittently adjusts pressure in the hydraulic system... using solenoid valves and a pump to create tactile feedback
Implementation Method 3
using solenoid valves and a pump to create tactile feedback
Implementation Method 4
a pressure sensor to detect and communicate pressure changes
Data Source
Figure 1
Figure 2
Figure 3A~3B
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 10 intermittently increase and decrease the pressure in the hydraulic system such that tactile feedback is provided to the brake pedal.