A method of on-demand energy delivery to an active suspension system is disclosed. The suspension system includes an actuator body, a hydraulic pump, an electric motor, a plurality of sensors, an energy storage facility, and a controller. The method includes disposing an active suspension system in a vehicle between a wheel mount and a vehicle body, detecting a wheel event requiring control of the active suspension; and sourcing energy from the energy storage facility and delivering it to the electric motor in response to the wheel event.

A method of on-demand energy delivery to an active suspension system is disclosed. The suspension system includes an actuator body, a hydraulic pump, an electric motor, a plurality of sensors, an energy storage facility, and a controller. The method includes disposing an active suspension system in a vehicle between a wheel mount and a vehicle body, detecting a wheel event requiring control of the active suspension; and sourcing energy from the energy storage facility and delivering it to the electric motor in response to the wheel event.

A suspension system for a vehicle, includes (a) a shock absorber disposed between a sprung portion and an unsprung portion and having a damping-force changing mechanism, the shock absorber being configured to generate a damping force with respect to a relative movement of the sprung portion and the unsprung portion such that the magnitude of the damping force is changeable, and (b) a controller configured to control the damping-force changing mechanism. The controller includes a target sprung-speed determining portion configured to determine, as a target sprung speed, a speed of the sprung portion in a behavior of a body of the vehicle that matches an operation input to the vehicle by a driver, for permitting the behavior to match the operation input, the controller being configured to control the damping force such that the speed of the sprung portion becomes equal to the target sprung speed.

A method is described for determining multiplicative faults of a sensor installed in a system comprising a plurality of sensors, comprising the steps of:detecting an effective target signal (s) from a target sensor, representative of a target quantity of the system;detecting one or more auxiliary signals respectively from one or more auxiliary sensors of the system besides the target sensor, representative of auxiliary quantities of the system;determining an estimated target signal (s*) representative of the target quantity from the one or more auxiliary signals;determining a first quadratic difference (r+) between the effective target signal (s) multiplied by a multiplicative positive factor (cr+) greater than 1, and the estimated target signal (s*);determining a second quadratic difference (r) between the effective target signal (s) and estimated target signal (s*);determining a third quadratic difference (r) between the effective target signal (s) multiplied by a positive multiplicative factor (c) smaller than 1, and the estimated target signal (s*);determining a first ratio (r/r+) between the second (r) and lirst quadratic differences (r+);determining a second ratio (r/r) between the second (r) and third quadratic differences (r);comparing the first (r/r+) and second ratios (r/r) with a first comparison factor (Kf);determining the square of the effective target signal (s); determining the square of the estimated target signal (s*); comparing the square of the effective target signal (s) and square of estimated target signatl (s*) with a second comparison factor (Ke); establishing the presence of multiplicative faults of target sensor if at least one between the first (r/r+) and second ratios (r/r) is greater than the first comparison factor (Kf), and at least one between the square of the effective target signal (s) and square of the estimated target signal (s*) is greater than said second comparison factor (Ke).

A method of on-demand energy delivery to an active suspension system is disclosed. The suspension system includes an actuator body, a hydraulic pump, an electric motor, a plurality of sensors, an energy storage facility, and a controller. The method includes disposing an active suspension system in a vehicle between a wheel mount and a vehicle body, detecting a wheel event requiring control of the active suspension; and sourcing energy from the energy storage facility and delivering it to the electric motor in response to the wheel event.