Composite Linearization Control Method and Realization Circuit for Hysteresis Characteristics of Piezoelectric Ceramic Actuators
A technology of piezoelectric ceramics and control methods, which is applied to parts and components of piezoelectric devices or electrostrictive devices, and can solve problems such as the inability to control precise positioning of piezoelectric ceramic actuators
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specific Embodiment 1
[0058] like figure 1 As shown, the hardware composition of the implementation circuit of the composite linearization control method in this embodiment includes a control signal generator (1), a first analog-to-digital converter (2), a composite linearization controller (3), a digital-to-analog converter (4), a power amplifier (5), a displacement sensor (7), a signal conditioning circuit (8) and a second analog-to-digital converter (9). Among them, the feed-forward linearization controller is realized by chips or systems with digital signal processing functions such as DSP chips, single-chip microcomputers, CPLD / FPGA chips, and ARM chips. The compound linearization controller (3) includes a feedforward linearization controller (3-1) and a closed-loop linearization controller (3-2), and the feedforward linearization controller (3-2) contains a hysteresis component observer ( 3-1-1), the first multiplier (3-1-2) and the first adder (3-1-3), which are used to complete the previou...
specific Embodiment 2
[0089] like Figure 5 As shown, the difference between this embodiment and the first embodiment is that the signal generated by the control signal generator (1) is a digital control voltage , can be directly sent to the compound linearization controller (3), without the need of the first analog-to-digital converter (2), and the output of the displacement sensor (7) is a digital displacement signal , can also be directly sent to the compound linearization controller (3) without going through the second analog-to-digital converter (8).
specific Embodiment 3
[0090] like Image 6 As shown, the difference between this embodiment and Embodiment 1 is that the hardware composition of the composite linearization controller includes: a control signal generator (1), a signal preprocessor (10), a first analog-to-digital converter (2 ), compound linearization controller (3), digital-to-analog converter (4), power amplifier (5), displacement sensor (7), signal conditioning circuit (8) and analog-to-digital converter 2 (9). The user can control any analog control voltage generated by the signal generator (1) through the signal pre-processor (10) The converted analog control signal is sent to the first analog-to-digital converter (2), and the first analog-to-digital converter (2) converts the analog control signal into a digital control signal and sends it to the composite linearization controller (3) to achieve external Composite linearization control of any input analog control voltage.
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