Optimal on-off controller with charge recovery for thin-film piezoelectric actuators for an autonomous mobile micro-robot

Edamana, Biju; Oldham, Kenn R.

doi:10.1109/acc.2011.5991459

Cited by 2 publications

(4 citation statements)

References 13 publications

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“…Campolo et al created a charge recovery method with two piezoelectric actuators [14]. Edamana et al also proposed a similar circuit, which included optimal control schemes for precise positioning [15,16]. Figure 2 illustrates a simplified circuit of these concepts.…”

Section: Proposed Conceptmentioning

confidence: 99%

“…If the charge can be reused, efficiency will be improved. Therefore, many studies have been carried out on charge recovery [11][12][13][14][15][16]. They can be categorized into two methods: one using an inductor and the other with a capacitor.…”

Section: Introductionmentioning

confidence: 99%

“…The drawback of this method is the inductor's huge mass, which generally makes the inductor bulky and heavy; therefore, it is not suitable for mobile robot applications. Several researchers proposed charge recovery circuits that transfer the charge in the parasitic capacitance to another capacitor (or piezoelectric actuator) and reuses it [13][14][15][16]. Their circuits utilizing capacitors are lighter than those with inductors because they are composed of switches.…”

Section: Introductionmentioning

confidence: 99%

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Power-Efficient Driver Circuit for Piezo Electric Actuator with Passive Charge Recovery

Ozaki

Ohta

2020

Energies

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Piezoelectric actuation is a promising principle for insect-scaled robots. A major concern while utilizing a piezoelectric actuator is energy loss due to its parasitic capacitance. In this paper, we propose a new concept to recover the charge stored in the parasitic capacitance; it requires only three additional lightweight passive components: two diodes and a resistor. The advantages of our concept are its small additional mass and simple operating procedure compared with existing charge recovery circuits. We provided a guideline for selecting a resistor using a simplified theoretical model and found that half of the charge can be recovered by employing a resistor that has a resistance sufficiently larger than the forward resistance of the additional diode. In addition, we experimentally demonstrated the concept. With a capacitive load (as a replacement for the piezoelectric actuator), it was successfully observed that the proposed concept decreased the power consumption to 58% of that in a circuit without charge recovery. Considering micro aerial vehicle (MAV) applications, we measured the lift-to-power efficiency of a flapping wing piezoelectric actuator by applying the proposed concept. The lift force was not affected by charge recovery; however, the power consumption was reduced. As a result, the efficiency was improved to 30.0%. We expect that the proposed circuit will contribute to the advancement of energy-saving microrobotics.

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Section: Proposed Conceptmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Power-Efficient Driver Circuit for Piezo Electric Actuator with Passive Charge Recovery

Ozaki

Ohta

2020

Energies

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“…In another part of the circuit, a simple push-pull driver described in Reference [15] can generate a unipolar square wave voltage across the load without energy recovery. The majority of existing topologies focus on efficient piezoelectric driving for large-scale and high-power applications, which reduces the efficiency and power density of the power supply [20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

A Dual Stage Low Power Converter Driving for Piezoelectric Actuator Applied in Micro Mobile Robot

Chen

Wang

2018

Applied Sciences

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Piezoelectric actuators are widely utilized to convert electrical energy into mechanical strain with considerable potential in micro mobile robot applications. However, the use of Pb-based Lanthanumdoped Zirconate Titanates (PZTs) leads to two difficulties in drive circuit design, namely, high voltage step-up ratio and high energy conversion efficiency. When some devices driven by piezoelectric actuators are used in emerging technologies, such as micro mobile robot, to perform special tasks, low mass, high energy density, and high conversion efficiency are strategically important. When these demands are considered, conventional drive circuits exhibit the disadvantages of being too bulky and inefficient for low mass applications. To overcome the aforementioned drawbacks, and to address the need for a piezoelectric bimorph actuator, this work proposed a high step-up ratio flyback converter cascaded with a bidirectional half-bridge stage controlled, via a pulse width modulation strategy, and a novel control method. Simulations and experiments were conducted to verify the ability of the proposed converter to drive a 100 V-input piezoelectric bimorph actuator using a prototype 108 mg (excluding printed circuit board mass), 169 (13 × 13) mm2, and 500 mW converter.

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Optimal on-off controller with charge recovery for thin-film piezoelectric actuators for an autonomous mobile micro-robot

Cited by 2 publications

References 13 publications

Power-Efficient Driver Circuit for Piezo Electric Actuator with Passive Charge Recovery

Power-Efficient Driver Circuit for Piezo Electric Actuator with Passive Charge Recovery

A Dual Stage Low Power Converter Driving for Piezoelectric Actuator Applied in Micro Mobile Robot

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