Piezo actuators
Categories
Compact sensitive piezoelectric mass balance for measurement of unconsolidated materials in space
19 June 2023
In many in-situ instruments information about the mass of the sample could aid in the interpretation of the data and portioning instruments might require an accurate sizing of the sample mass before dispensing the sample. In addition, on potential sample return missions a method to directly assess the captured sample size would be required to determine if the sampler could return or needs to continue attempting to acquire sample.
Improvement of Linear and Rotative Stepping Piezo Actuators using design and control
19 June 2023
Stepping Piezo Actuators (SPA) are inertial piezo motors able to reach long stroke with important resolution. Previous work showed that large benefits in terms of speed and input current are taken from use of Amplified Piezo Actuators (APA®). The aim of this paper is to present new rotative configuration, advancements in maximal actuation force into thermal vacuum conditions and improvements using smart control.
Improvement of MSPA module of stepping piezo actuator
7 June 2018
Modular Stepping Piezo Actuators (MSPA) use the stick-slip principle to combine high resolution positioning (cm). These motors provide unlimited motion in both rotation and translation. Fine mode allows precise positioning (<10nm). Since it is a module, it easily fits any existing devices requiring up to 25N of driving force with a speed up to 50mm/s. This motor module benefits the use of space qualified Amplified Piezo Actuators (APA®). It is then deemed a good candidate for severe environments such as vacuum, cryo, vibrations, nonmagnetic etc… This paper presents three technical challenges encountered for the development of MSPA product. The first one is the issue of noise resulting from stick-slip actuation below ultrasonic frequencies. The second is the miniaturization at low voltage: One is macro size (sugar cube) working at 45V is characterized, the other is micro size (grain of rice) powered at low voltage below 60V. The third challenge is the successful and reliable integration of the module within new customer applications and new Cedrat Technologies’ products.
Segmented bimorph mirrors for adaptive optics:segment design and experiment
19 June 2023
This paper discusses a concept of light weight segmented bimorph mirror for adaptive optics. The segment consists of a monocrystal Silicon substrate actuated by an array of in-plane piezoceramic (PZT) actuators with honeycomb electrodes. The paper focuses on technological aspects of the segment design which are critical for space applications and describes a single segment demonstrator. The morphing capability of the segment is evaluated experimentally. The paper also discusses the local deformations (dimples) associated with the shape of the electrodes acting on the PZT array.
Improvement of Synthetic Jet Actuator Technology for High Efficiency
8 August 2022
SYNJET3C is a CleansKy2 development project aiming at improving the efficiency of Synthetic Jet Actuators (SJA),
with a consortium composed of major European actors to this technology which are ONERA, FRAUNHOFER,
TRISITEC, and CEDRAT TECHNOLOGIES (CTEC).
Compact, Lightweight, and Efficient Piezo-Actuation Chain for aeronautical applications
19 June 2023
Many past and on-going studies are focusing on the use of piezo-actuators for aeronautical applications. One of the trendiest topics is the use of such devices for active flow control in aircraft, in order to reduce fuel consumption and noise. However, the implementation of such systems in aircraft suffer a lack of maturity with respect to aeronautical constraints, which are: high efficiency, compactness, and lightweight. In general, the actuators are composed of ceramics integrated in a metallic shell, which makes them heavy. For driving the actuators, the power amplifiers employed are usually linear amplifiers, which have a poor efficiency, leading to bulky designs due to large heatsinks. This paper presents recent developments that have been made to cope with these issues in order to obtain a piezo-actuation chain suitable for aeronautical applications.
