To: Subject: [rjwood@eecs.berkeley.edu: latest MFI, etc] Reply-to: ronf@eecs.berkeley.edu --text follows this line-- ------- Start of forwarded message ------- From: "Robert John Wood" To: , , , , , Subject: latest MFI, etc Date: Thu, 18 Dec 2003 18:47:53 -0800 Content-Type: text/plain; charset="us-ascii" X-Priority: 3 (Normal) X-MSMail-Priority: Normal In-reply-to: <200312050159.RAA09793@albinoni.EECS.Berkeley.EDU> Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 X-MIME-Autoconverted: from quoted-printable to 8bit by robotics.EECS.Berkeley.EDU id hBJ2l0Lb004241 Content-Length: 1328 I completed the latest MFI (calling it the diamond shaped MFI since I don't know what greek letter we are on). This is the first 4DOF MFI with bimorph actuators (11mg each). The total MFI weighs ~85mg and has ~55 degrees flapping at DC and ~95 at 200Hz. Everything seems to work well except for the (obviously) low Q and some coupling between opposite actuators. I am going to make some adjustments to the airframe next week, nothing else of note needs to be changed yet. I will be gone next week, so feel free to test this structure (in my drawer) in any fashion. Also, for other tests I left 6 bimorphs in the drawer labeled "bimorphs" (no shit). They all have ~450um displacement and ~100mN blocked force. Feel free to take any or all of them for testing, they are quick and easy to make now. The next few items I can think of to work on (in parallel with characterization and wing control experiments) are: (1) Modification of the airframe and nest to correct airframe problems and match the nest to the latest airframe (2) full hysteresis and saturation characterization of bimorphs using erik's sensor with a number of driving techniques (3) construction, characterization, and liftoff test for the next version MFI (maybe first week in Jan) (4) (in parallel) begin stockpiling all MFI components wood ------- End of forwarded message -------