Abstract: The technology disclosed relates to a controller and a control method for a motorized vehicle, and in particular to the control of a motorized vehicle having at least a left wheel and a right wheel, the left wheel being driven by a left motor and the right wheel being driven by a right motor. In accordance with such motorized vehicles, linear motion of the vehicle is typically effected by driving the left motor and the right motor in the same direction, while spinning of the vehicle is typically effected by driving the left motor and the right motor in opposite directions. A typical example of such a motorized vehicle is an electric wheelchair.

Abstract: A front wheel drive motorized vehicle controller comprises: a control signal interface receiving control signals from a user control device indicating at least a demanded forward speed; an acceleration measurement interface, receiving acceleration measurements from at least one vehicle-mounted acceleration sensor, providing a first and second acceleration measurements with respect to first and second axes, the motorized vehicle being configured to be driven in a plane defined by the first and second axes; an acceleration magnitude calculation unit calculating an acceleration magnitude in dependence on the first and second acceleration measurements; a speed modification unit calculating a forward speed reduction factor in dependence on the acceleration magnitude and applying the forward speed reduction factor to the demanded forward speed to produce an applied forward speed; and a motor control unit controlling the speed of the left and right drive wheels in dependence on the applied forward speed.

Abstract: A control system for controlling a motor arrangement for differentially driving left and right wheels of a motorized vehicle, the control system comprising: a comparator for receiving yaw rate sensor signals from a yaw rate sensor attached to the vehicle, the yaw rate sensor signals being indicative of actual yaw rates of the vehicle and for receiving yaw rate reference signals generated by a user input device, the yaw rate reference signals being indicative of user demanded yaw rates for the vehicle, the comparator arranged to output yaw rate error signals based on the difference between the yaw rate sensor signals and the yaw rate reference signals; a control loop for processing the yaw rate error signals to generate yaw rate correction signals for controlling the motor arrangement to reduce the yaw rate error signals, wherein the control loop comprises a variable limiter for limiting the yaw rate correction signals to values within a variable limit, the variable limit varying in dependence upon the yaw rat

Abstract: A front wheel drive motorised vehicle controller comprises: a control signal interface receiving control signals from a user control device indicating at least a demanded forward speed; an acceleration measurement interface, receiving acceleration measurements from at least one vehicle-mounted acceleration sensor, providing a first and second acceleration measurements with respect to first and second axes, the motorised vehicle being configured to be driven in a plane defined by the first and second axes; an acceleration magnitude calculation unit calculating an acceleration magnitude in dependence on the first and second acceleration measurements; a speed modification unit calculating a forward speed reduction factor in dependence on the acceleration magnitude and applying the forward speed reduction factor to the demanded forward speed to produce an applied forward speed; and a motor control unit controlling the speed of the left and right drive wheels in dependence on the applied forward speed.

Abstract: The technology disclosed relates to a controller and a control method for a motorised vehicle, and in particular to the control of a motorised vehicle having at least a left wheel and a right wheel, the left wheel being driven by a left motor and the right wheel being driven by a right motor. In accordance with such motorised vehicles, linear motion of the vehicle is typically effected by driving the left motor and the right motor in the same direction, whilst spinning of the vehicle is typically effected by driving the left motor and the right motor in opposite directions. A typical example of such a motorised vehicle is an electric wheelchair.

Abstract: A control system for controlling a motor arrangement for differentially driving left and right wheels of a motorized vehicle, the control system comprising: a comparator for receiving yaw rate sensor signals from a yaw rate sensor attached to the vehicle, the yaw rate sensor signals being indicative of actual yaw rates of the vehicle and for receiving yaw rate reference signals generated by a user input device, the yaw rate reference signals being indicative of user demanded yaw rates for the vehicle, the comparator arranged to output yaw rate error signals based on the difference between the yaw rate sensor signals and the yaw rate reference signals; a control loop for processing the yaw rate error signals to generate yaw rate correction signals for controlling the motor arrangement to reduce the yaw rate error signals, wherein the control loop comprises a variable limiter for limiting the yaw rate correction signals to values within a variable limit, the variable limit varying in dependence upon the yaw rat