Capacitive Proximity Sensor Position Feedback in Active Vibration Control of Lightly Damped Cantilevers
نویسنده
چکیده
This paper investigates the use of capacitive proximity sensors as sources of contact-free feedback signal measurement for active vibration attenuation applications. An experimental laboratory device is introduced, which consists of a clamped cantilever beam and actuated by bonded piezoelectric actuators. A measurement model is created and experimentally verified for the assessment of beam tip deflections, using a capacitive proximity sensor and a piezoelectric sensor patch. Damping performance is analyzed both in time and frequency domains for different feedback methods, and compared to a precise reference. According to the analysis presented in this paper, real-time feedback from capacitive sensors is potentially useful in active vibration attenuation and control applications.
منابع مشابه
Design of a Lightweight, Electrodynamic, Inertial Actuator with Integrated Velocity Sensor for Active Vibration Control of a Thin Lightly-Damped Panel
This paper presents the design study of a lightweight inertial actuator, with integrated velocity sensor, for the implementation of velocity feedback control, i.e. active damping, in lightly-damped panels. The arrangement provides a collocated force actuator and velocity sensor device so that, in principle, an unconditionally stable direct velocity feedback loop could be implemented. However, t...
متن کاملModel independent control of lightly damped noise/vibration systems.
Feedforward control is a popular strategy of active noise/vibration control. In well-damped noise/vibration systems, path transfer functions from actuators to sensors can be modeled by finite impulse response (FIR) filters with negligible errors. It is possible to implement noninvasive model independent feedforward control by a recently proposed method called orthogonal adaptation. In lightly d...
متن کاملActive Vibration Suppression of a Nonlinear Flexible Spacecraft
In this article, the issue of attitude control and active vibration suppression of a nonlinear flexible spacecraft is assessed through piezoelectric patches as actuator and sensors. Two controller loops are applied: the inner loop, to make the panel vibration damped through piezoelectric patches; and the outer loop, to perform spacecraft maneuver using the reaction wheel acting on the hub. An o...
متن کاملA Simple Force Balance Accelerometer/seismometer Based on a Tuning Fork Displacement Sensor
Seismometers and MEMS accelerometers use the force-balance principle to obtain measurements. In these instruments the displacement of a mass object by an unknown force is sensed using a very highresolution displacement sensor. The position of the object is then stabilised by applying an equal and opposite force to it. The magnitude of the stabilising force is easily measured, and is assumed to ...
متن کاملDamped One-Mode Vibration Model State and Parameter Estimation via Pre-Filtered Moving Horizon Observer ⋆
The estimation of parameters and states is one of the core data-processing algorithms used for the monitoring and control of continuum or structured mechatronical systems (e.g., flexible robotic arms and cantilevers). The measurements taken from the sensors combined with an appropriate model can filter the states and extract information about vibration dynamics parameters such as damping and sp...
متن کامل