#Powerhap piezo actuator full#
3 New requirements for haptic feedback technologies Low insertion height Fast response time High acceleration High force Large displacement Flexible wave form design Integrated sensing functionality The challenge is to enhance the sensory experience of HMIs and engage the full range of tactile sensitivity CC 11/16 3Ĥ Today s technologies for haptic HMIs Attracting Tomorrow Eccentric rotary mass (ERM) Off-center rotating mass spins, creating an omni-directional vibration Modulation limited to pulsing and speed Vibration of entire device (global) Linear resonant actuators (LRA) Magnet attached to a spring, surrounded by a coil and housed in a casing, moves in a linear fashion and brought up to the resonant frequency Modulation limited to amplitude of input at resonant frequency Vibration of entire device (global) Piezo disks and benders Piezoelectric ceramic material that expands or contracts when voltage is applied Frequency and amplitude can be modulated freely Vibration of entire device (global) and more localized haptics CC 11/16 4ħ Operating mode of the PowerHap Attracting Tomorrow z y x When voltage is applied to the piezo plate Small displacement (expansion) in the z-axis of the piezo plate of only 1.5 µm But negative displacement (contraction) in x- and y-axes of the piezo plates of 13 µm and 6.5 µm, respectively, due to the volume constant piezo effect.
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