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    <title>Zettels on My digital brain</title>
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    <description>Recent content in Zettels on My digital brain</description>
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    <item>
      <title>Active Damping</title>
      <link>/zettels/active_damping/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>/zettels/active_damping/</guid>
      <description>Tags :
&amp;lt;./biblio/references.bib&amp;gt;
Backlinks  Active isolation and damping of vibrations via stewart platform Active damping based on decoupled collocated control  </description>
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    <item>
      <title>Actuators</title>
      <link>/zettels/actuators/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>/zettels/actuators/</guid>
      <description>Tags :
How to choose the correct actuator for my application? For vibration isolation:
 In (Shingo Ito &amp;amp; Georg Schitter, 2016), the effect of the actuator stiffness on the attainable vibration isolation is studied (Notes)  Piezoelectric    Suppliers Links     Cedrat link   PI link   Piezo System link   Noliac link    A model of a multi-layer monolithic piezoelectric stack actuator is described in (Fleming, 2010) (Notes).</description>
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    <item>
      <title>Complementary Filters</title>
      <link>/zettels/complementary_filters/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>/zettels/complementary_filters/</guid>
      <description>Tags :
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Backlinks  Advances in internal model control technique: a review and future prospects  </description>
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    <item>
      <title>Cubic Architecture</title>
      <link>/zettels/cubic_architecture/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>/zettels/cubic_architecture/</guid>
      <description>Tags :
&amp;lt;./biblio/references.bib&amp;gt;
Backlinks  Sensors and control of a space-based six-axis vibration isolation system Dynamic modeling and decoupled control of a flexible stewart platform for vibration isolation Simultaneous, fault-tolerant vibration isolation and pointing control of flexure jointed hexapods  </description>
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    <item>
      <title>Electronics</title>
      <link>/zettels/electronics/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>/zettels/electronics/</guid>
      <description>Tags :
&amp;lt;./biblio/references.bib&amp;gt;
Backlinks  The art of electronics - third edition  </description>
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    <item>
      <title>Flexible Joints</title>
      <link>/zettels/flexible_joints/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>/zettels/flexible_joints/</guid>
      <description>Tags :
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Backlinks  A six-axis single-stage active vibration isolator based on stewart platform Nanometre-cutting machine using a stewart-platform parallel mechanism Dynamic modeling and experimental analyses of stewart platform with flexible hinges Dynamic modeling and decoupled control of a flexible stewart platform for vibration isolation Simultaneous, fault-tolerant vibration isolation and pointing control of flexure jointed hexapods Investigation on active vibration isolation of a stewart platform with piezoelectric actuators Identification and decoupling control of flexure jointed hexapods  </description>
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    <item>
      <title>Force Sensors</title>
      <link>/zettels/force_sensors/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>/zettels/force_sensors/</guid>
      <description>Tags :
Suppliers          PCB link    Dynamics and Noise of a piezoelectric force sensor An analysis the dynamics and noise of a piezoelectric force sensor is done in (Fleming, 2010) (Notes).
Bibliography Fleming, A., Nanopositioning system with force feedback for high-performance tracking and vibration control, IEEE/ASME Transactions on Mechatronics, 15(3), 433–447 (2010). http://dx.doi.org/10.1109/tmech.2009.2028422 ↩</description>
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    <item>
      <title>H Infinity Control</title>
      <link>/zettels/h_infinity_control/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>/zettels/h_infinity_control/</guid>
      <description>Tags :
Nice Citations From Rosenbrock, H. H. (1974). Computer-Aided Control System Design, Academic Press, New York:
 Solutions are constrained by so many requirements that it is virtually impossible to list them all. The designer finds himself threading a maze of such requirements, attempting to reconcile conflicting demands of cost, performance, easy maintenance, and so on. A good design usually has strong aesthetic appeal to those who are competent in the subject.</description>
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    <item>
      <title>HAC-HAC</title>
      <link>/zettels/hac_hac/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>/zettels/hac_hac/</guid>
      <description>Tags :
High-Authority Control/Low-Authority Control
From (Andre Preumont, 2018):
 The HAC/LAC approach consist of combining the two approached in a dual-loop control as shown in Figure 1. The inner loop uses a set of collocated actuator/sensor pairs for decentralized active damping with guaranteed stability ; the outer loop consists of a non-collocated HAC based on a model of the actively damped structure. This approach has the following advantages:
 The active damping extends outside the bandwidth of the HAC and reduces the settling time of the modes which are outsite the bandwidth The active damping makes it easier to gain-stabilize the modes outside the bandwidth of the output loop (improved gain margin) The larger damping of the modes within the controller bandwidth makes them more robust to the parmetric uncertainty (improved phase margin)</description>
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    <item>
      <title>Inertial Sensors</title>
      <link>/zettels/inertial_sensors/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>/zettels/inertial_sensors/</guid>
      <description>Tags Position Sensors  Reviews  (Collette {\it et al.}, 2012)  Accelerometers          Micromega Dynamics link   MMF link   PCB link    Wireless Accelerometers
 https://micromega-dynamics.com/products/recovib/miniature-vibration-recorder/  
  Figure 1: Characteristics of commercially available accelerometers (Collette {it et al.}, 2011)
  Geophones          Sercel link   Wilcoxon link</description>
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    <item>
      <title>Metrology</title>
      <link>/zettels/metrology/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>/zettels/metrology/</guid>
      <description>Tags :
&amp;lt;./biblio/references.bib&amp;gt;
Backlinks  Fundamental principles of engineering nanometrology  </description>
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    <item>
      <title>Motion Control</title>
      <link>/zettels/motion_control/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>/zettels/motion_control/</guid>
      <description>Tags :
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Backlinks  Advanced motion control for precision mechatronics: control, identification, and learning of complex systems  </description>
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    <item>
      <title>Multivariable Control</title>
      <link>/zettels/multivariable_control/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>/zettels/multivariable_control/</guid>
      <description>Tags :
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Backlinks  Position control in lithographic equipment Implementation challenges for multivariable control: what you did not learn in school! Simultaneous, fault-tolerant vibration isolation and pointing control of flexure jointed hexapods Multivariable control systems: an engineering approach Multivariable feedback control: analysis and design  </description>
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    <item>
      <title>Nano Active Stabilization System</title>
      <link>/zettels/nano_active_stabilization_system/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>/zettels/nano_active_stabilization_system/</guid>
      <description>Tags :
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Backlinks  Interferometric characterization of rotation stages for x-ray nanotomography Automated markerless full field hard x-ray microscopic tomography at sub-50 nm 3-dimension spatial resolution An instrument for 3d x-ray nano-imaging  </description>
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    <item>
      <title>Position Sensors</title>
      <link>/zettels/position_sensors/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>/zettels/position_sensors/</guid>
      <description>Tags Inertial Sensors  Reviews of position sensors  (Collette {\it et al.}, 2012) Fleming, A. J., A review of nanometer resolution position sensors: operation and performance (Andrew Fleming, 2013) (Notes)  Relative Position Sensors 
Table 1: Characteristics of relative measurement sensors collette11_review     Technology Frequency Resolution Range T Range     LVDT DC-200 Hz 10 nm rms 1-10 mm -50,100 °C   Eddy current 5 kHz 0.</description>
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    <item>
      <title>Positioning Stations</title>
      <link>/zettels/positioning_stations/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>/zettels/positioning_stations/</guid>
      <description>Tags :
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Backlinks  Interferometric characterization of rotation stages for x-ray nanotomography Position control in lithographic equipment An instrument for 3d x-ray nano-imaging  </description>
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    <item>
      <title>Precision Engineering</title>
      <link>/zettels/precision_engineering/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>/zettels/precision_engineering/</guid>
      <description>Tags :
&amp;lt;./biblio/references.bib&amp;gt;
Backlinks  Design for precision: current status and trends Basics of precision engineering - 1st edition  </description>
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    <item>
      <title>Reference Books</title>
      <link>/zettels/reference_books/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>/zettels/reference_books/</guid>
      <description>Tags :
&amp;lt;./biblio/references.bib&amp;gt;
Backlinks  Modal testing: theory, practice and application The art of electronics - third edition Vibration Control of Active Structures - Fourth Edition Parallel robots : mechanics and control The design of high performance mechatronics - 2nd revised edition Multivariable feedback control: analysis and design  </description>
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    <item>
      <title>Sensor Fusion</title>
      <link>/zettels/sensor_fusion/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>/zettels/sensor_fusion/</guid>
      <description>Tags :
&amp;lt;./biblio/references.bib&amp;gt;
Backlinks  Sensor fusion for active vibration isolation in precision equipment Vibration control of flexible structures using fusion of inertial sensors and hyper-stable actuator-sensor pairs Sensor fusion methods for high performance active vibration isolation systems Nanopositioning system with force feedback for high-performance tracking and vibration control Nanopositioning with multiple sensors: a case study in data storage  </description>
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    <item>
      <title>Stewart Platforms</title>
      <link>/zettels/stewart_platforms/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>/zettels/stewart_platforms/</guid>
      <description>Tags :
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Backlinks  Six dof active vibration control using stewart platform with non-cubic configuration Decentralized vibration control of a voice coil motor-based stewart parallel mechanism: simulation and experiments Dynamic modeling and decoupled control of a flexible stewart platform for vibration isolation Parallel robots : mechanics and control Investigation on active vibration isolation of a stewart platform with piezoelectric actuators Identification and decoupling control of flexure jointed hexapods The stewart platform manipulator: a review Modeling and control of vibration in mechanical systems Studies on stewart platform manipulator: a review Nanometre-cutting machine using a stewart-platform parallel mechanism An intelligent control system for multiple degree-of-freedom vibration isolation Active isolation and damping of vibrations via stewart platform Sensors and control of a space-based six-axis vibration isolation system Dynamic modeling and experimental analyses of stewart platform with flexible hinges Simultaneous, fault-tolerant vibration isolation and pointing control of flexure jointed hexapods A new isotropic and decoupled 6-dof parallel manipulator Simultaneous vibration isolation and pointing control of flexure jointed hexapods A six-axis single-stage active vibration isolator based on stewart platform Vibration Control of Active Structures - Fourth Edition A soft 6-axis active vibration isolator  </description>
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    <item>
      <title>System Identification</title>
      <link>/zettels/system_identification/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>/zettels/system_identification/</guid>
      <description>Tags :
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Backlinks  Modal testing: theory, practice and application  </description>
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    <item>
      <title>Test File</title>
      <link>/zettels/test/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>/zettels/test/</guid>
      <description>This is a quote!
 1 2  a = 2; figure;    This is an important part of the text.
 See Eq. eq:test1 and eq:test2.
\begin{equation} a = 1 \end{equation}
\begin{equation} a = 2 \label{eq:test2} \end{equation}
Also look at 1 \eqref{eq:test2}.
Some text.
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Some text.</description>
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    <item>
      <title>Vibration Isolation</title>
      <link>/zettels/vibration_isolation/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>/zettels/vibration_isolation/</guid>
      <description>Tags :
&amp;lt;./biblio/references.bib&amp;gt;
Backlinks  Six dof active vibration control using stewart platform with non-cubic configuration Dynamic modeling and decoupled control of a flexible stewart platform for vibration isolation Investigation on active vibration isolation of a stewart platform with piezoelectric actuators Review of active vibration isolation strategies Vibration control of flexible structures using fusion of inertial sensors and hyper-stable actuator-sensor pairs Sensor fusion methods for high performance active vibration isolation systems Modeling and control of vibration in mechanical systems An intelligent control system for multiple degree-of-freedom vibration isolation Active isolation and damping of vibrations via stewart platform Sensors and control of a space-based six-axis vibration isolation system Comparison and classification of high-precision actuators based on stiffness influencing vibration isolation Simultaneous, fault-tolerant vibration isolation and pointing control of flexure jointed hexapods Simultaneous vibration isolation and pointing control of flexure jointed hexapods An exploration of active hard mount vibration isolation for precision equipment Force feedback versus acceleration feedback in active vibration isolation A six-axis single-stage active vibration isolator based on stewart platform Vibration Control of Active Structures - Fourth Edition A soft 6-axis active vibration isolator Sensor fusion for active vibration isolation in precision equipment  </description>
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