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1: Functional requirements

1.1: F1 Static Braking

EPB-0004 Static Braking

Diagram pending; it is loading in the background.

EPB-0009 Static Braking availability

Static braking has to be deactivated where the vehicle speed is less than 4 Km/h +/- 0.1

Diagram pending; it is loading in the background.

EPB-0013 Static Braking command

When available, static braking shall be triggered when user presses the braking button for more than 50 ms

Diagram pending; it is loading in the background.

EPB-0015 Static braking strength

Static braking has to apply a strength s where 1000 N <= s <= 1200 N

Diagram pending; it is loading in the background.

EPB-0018 Static Braking timing

Static braking has to achieve its target strength in less than 1 seconds.

Diagram pending; it is loading in the background.

EPB-0028 Static Braking actuator voltage

The static brakinga actuator has to hold its performance within a voltage range v where 8V < v < 16V

Diagram pending; it is loading in the background.

EPB-0026 Static Braking power

In any case the power consumption of the Static braking actuation can be > 100W

Diagram pending; it is loading in the background.

EPB-0024 Static Braking actuator hold

The braking actuator has to hold, when stopped and without power consumption, a stable strength s in the range 0 N <= s <= 1500 N

Diagram pending; it is loading in the background.

EPB-0022 Static Braking stability

Once the target strength is achieved, the action has to stop within the valid range in less than 100 ms.

Diagram pending; it is loading in the background.

EPB-0020 Static Braking progressivity

Static braking has to achieve its final strength by strictly incrementing it while it is still lower than the lower limit of the target strength. This increment has to occur at a velocity vs where 10 N/s < vs < 1500 N/s

Diagram pending; it is loading in the background.

1.2: F2 Dynamic braking

EPB-0005 Dynamic Braking

Diagram pending; it is loading in the background.

EPB-0010 Dynamic Braking availability

Dynamic braking has to be deactivated where the vehicle speed is less than 4 Km/h +/- 0.1

Diagram pending; it is loading in the background.

EPB-0014 Dynamic Braking command

When available, dynamic braking shall be triggered when user presses the braking button for more than 50 ms

Diagram pending; it is loading in the background.

EPB-0016 Dynamic braking strength

Dynamic braking has to apply a strength s where 1000 N <= s <= 1200 N

Diagram pending; it is loading in the background.

EPB-0019 Dynamic Braking timing

Dynamic braking has to achieve its target strength in less than 1 seconds.

Diagram pending; it is loading in the background.

EPB-0029 Dynamic Braking actuator voltage

The dynamic brakinga actuator has to hold its performance within a voltage range v where 8V < v < 16V

Diagram pending; it is loading in the background.

EPB-0027 Dynamic Braking power

In any case the power consumption of the Dynamic braking actuation can be > 100W

Diagram pending; it is loading in the background.

EPB-0025 Dynamic Braking actuator hold

The braking actuator has to hold, when stopped and without power consumption, a stable strength s in the range 0 N <= s <= 1500 N

Diagram pending; it is loading in the background.

EPB-0023 Dynamic Braking stability

Once the target strength is achieved, the action has to stop within the valid range in less than 100 ms.

Diagram pending; it is loading in the background.

EPB-0021 Dynamic Braking progressivity

Dynamic braking has to achieve its final strength by strictly incrementing it while it is still lower than the lower limit of the target strength. This increment has to occur at a velocity vs where 10 N/s < vs < 1500 N/s

Diagram pending; it is loading in the background.

3: System requirements

System requirements for a target architecture to support the functions.

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EPB-0002 Strength sensor resolution

The strength sensor has to measure strength with a precision better >= 1N

Diagram pending; it is loading in the background.

EPB-0007 Strength sensing speed

The strengh sensor has to measure current strength at the brakes in less than 10 ms.

Diagram pending; it is loading in the background.

EPB-0012 Strength control system

A computational strength control system has to be able to sense current strength and compute a strength actuation second at 100 +/- 2 Hz.

Diagram pending; it is loading in the background.