Position control system

A ride control system for controlling a plurality of vehicles on a path, the ride control system comprising:

• a path processor;
• and
• a vehicle processor supported by each vehicle;
• a vehicle driving and stopping system in circuit with each vehicle processor;
• and
• a vehicle sensor device in circuit with each vehicle processor;
• wherein each vehicle processor is configured to communicate with the path processor and to use the vehicle sensor device to identify an actual velocity of a particular vehicle and further to use a position control correction module and a vehicle driving and stopping system to correct for variation in spacing between vehicles.

A method for determining slippage of at least one wheel of at least one vehicle having a motor and a processor that communicates velocity commands to the motor for varying a velocity of the vehicle, the method comprising:

• determining an actual velocity of the vehicle;
• comparing the actual velocity of the vehicle to the expected velocity from the magnitude of the velocity commands to determine whether there is slip of the wheel of the vehicle;
• and
• reducing the magnitude of the velocity commands to equal approximately the actual velocity of the vehicle where there is slip of the wheel.