Tactile vibration control system and method for smart terminal

Tactile vibration control method for a smart terminal, comprises:

• generating an initial commanding signal according to an input signal, adjusting the initial commanding signal to an adjusted commanding signal according to the generated error signal, and generating a driving signal according to the adjusted commanding signal so that a linear resonant actuator is driven by the driving signal to vibrate;
• sensing a status of the linear resonant actuator in real time by different types of sensors, and generating corresponding multiple channels of sensing signals when the sensors sense the vibration of the linear resonant actuator;
• fusing the multiple channels of sensing signals so as to obtain a feedback signal for estimating the vibration mode of the linear resonant actuator;
• and
• comparing the feedback signal with a desired signal in the input signal characterizing the vibration mode of the linear resonant actuator, generating an error signal according to a comparison result and adjusting the generated initial commanding signal according to the error signal;
• wherein the generating an initial commanding signal according to an input signal, and adjusting the initial commanding signal according to the generated error signal comprises:
• providing a filter, the filter filtering the adjusted commanding signal so that amplitudes of a predetermined number of initial pulses of the filtered commanding signal are larger than a set threshold and phases of a predetermined number of ending pulses reverse;
• or
• providing a filter, filtering the input signal by the filter, and generating an initial commanding signal according to the filtered input signal, so that the amplitudes of a predetermined number of initial pulses of the generated initial commanding signal are larger than a set threshold and phases of a predetermined number of ending pulses reverse.

Tactile vibration control system for a smart terminal, comprises:

• a command generator, a tactile driver, a filter, a linear resonant actuator, a sensing module, a feedback unit and a comparator;
• the command generator generates an initial commanding signal according to an input signal, adjusts the initial commanding signal to an adjusted commanding signal according to an error signal sent by the comparator and sends the adjusted commanding signal to the tactile driver;
• the tactile driver generates a driving signal according to the adjusted commanding signal received and sends the generated driving signal to the linear resonant actuator;
• the output port of the filter is connected to the input of the command generator, wherein the filter filters the input signal and sends the filtered input signal to the command generator;
• wherein the amplitudes of a predetermined number of initial pulses of the initial commanding signal generated by the command generator are larger than a set threshold and phases of a predetermined number of ending pulses reverse;
• the linear resonant actuator receives the driving signal and is driven by the driving signal to vibrate;
• the sensing module comprises different types of sensors in which each type of the sensors in real time senses a status of the linear resonant actuator and generates a corresponding sensing signal when sensing the vibration of the linear resonant actuator;
• the feedback unit fuses multiple channels of sensing signals generated by the sensing module, obtains a feedback signal for estimating the vibration mode of the linear resonant actuator, and sends the feedback signal to the comparator;
• and
• the comparator compares the feedback signal with a desired signal characterizing the vibration mode of the linear resonant actuator in the input signal, generates an error signal according to the comparison result, and sends the error signal to the command generator.