Braking system for test vehicle

A method for maintaining control of an overrunable test vehicle during high deceleration with the overrunable test vehicle having a wheel, a first braking system, a second braking system and a controller, the method comprising the steps of:

• determining a ground speed of the overrunable test vehicle;
• determining a rotational speed of the wheel of the overrunable test vehicle;
• calculating a wheel slip threshold based on the ground speed and the speed of the wheel using the controller;
• controlling one or more parameters of the first braking system using the controller to apply a first stopping force which is less than the wheel slip threshold;
• controlling one or more motor parameters of the second braking system using the controller to apply a second stopping force that is less than the wheel slip threshold;
• and
• concurrently applying the first and second stopping forces to decelerate the overrunnable test vehicle free of a wheel slip condition.

An overrunable test vehicle including an electronically-controlled anti-slip braking system for reducing wheel slip during rapid deceleration, the overrunable test vehicle comprising:

• a chassis;
• at least two wheels rotatably coupled to the chassis;
• at least one electric motor operatively coupled with the at least two wheels;
• a hydraulic braking system partially supported by the chassis operatively coupled with the at least two wheels;
• a rotational speed sensor connected to the at least two wheels for determining a rotational speed of the at least two wheels;
• a ground speed sensor supported by the chassis for determining a ground speed of the chassis;
• and
• a controller operatively connected with the at least one electric motor, the hydraulic braking system, the rotational speed sensor, and the ground speed sensor, the controller configured to:
• calculate a difference between the rotational speed of the at least two wheels and the ground speed of the chassis to determine a slip threshold of the wheels;
• actuate the hydraulic braking system to apply a first stopping force;
• control at least one motor parameter of the at least one electric motor to apply a second stopping force;
• and
• wherein the first and second stopping forces combined are less than the slip threshold of the wheels such that the chassis rapidly decelerates free of a wheel slip condition.

An overrunable test vehicle including an electronically-controlled anti-slip braking system for reducing wheel slip during rapid deceleration, the overrunable test vehicle comprising:

• a chassis;
• at least two wheels rotatably coupled to the chassis;
• a first braking system operatively coupled with the at least two wheels;
• a second braking system operatively coupled with the at least two wheels;
• a rotational speed sensor connected to the at least two wheels for determining a rotational speed of the at least two wheels;
• a ground speed sensor supported by the chassis for determining a ground speed of the chassis;
• and
• a controller operatively connected with the first braking system, the second braking system, the rotational speed sensor, and the ground speed sensor, the controller configured to:
• calculate a difference between the rotational speed of the at least two wheels and the ground speed of the chassis to determine a slip threshold of the at least two wheels;
• control at least one parameter of the first braking system to apply a first stopping force;
• and
• control at least one parameter of the second braking system to apply a second stopping force;
• wherein the first and second stopping forces combined are less than the slip threshold of the at least two wheels such that the chassis rapidly decelerates free of a wheel slip condition.