Bureau of Reclamation, Acquisition Operations Group, Code D-7810, Denver Federal Center, PO Box 25007, Denver CO 80225

66 -- HYDRAULIC SERVO CONTROLLER SOL 00SQ810255 DUE 080300 POC Evelyn M Tate 303-4456345 fax E-MAIL: Evelyn Tate, etate@do.usbr.gov. The Bureau of Reclamation is seeking potential sources for a Hydraulic Servo Controller. Potential sources must be capable of furnishing the following: Interested sources that can furnish an item meeting the above specification requirements are encouraged to submit substantiation to the Bureau of Reclamation, either by mail, fax, or transmittal to the e-mail address listed below no later than August 3, 2000. Responses should include brochures or other illustrative material in sufficient detail to demonstrate the respondent's ability to meet the requirements stated above, and should include the firm's Dun and Bradstreet number (DUNS) and Tax Identification Number (TIN), either by mail, fax, or transmittal to the e-mail address listed below no later than August 3, 2000. This is a Sources Sought Notice only, and not a Request for Quotation or an announcement of a solicitation. The Government will not pay for any materials furnished in response to this synopsis. Submittals furnished will not be returned tothe sender. Firms should identify themselves as either small business, or other than small business, in accordance with the size standard for Standard Industrial Classification (SIC) Code 3829 which is 500 employees. This notice is for market research purposes only, however, the information gathered from this notice will be used to determine which preference program will be used to process the acquisition (e.g., 8(a) set-aside under the Small Business Administration's 8(a) program, total small business set-aside, full and open competition). No preference program determination will be made until the market research has been completed. Hydraulic Servo Controller Requirements: An electronic PID servocontroller is required for control of a hydraulic actuator. The controller will be used in a materials testing laboratory in a variety of applications and with a variety of hydraulic actuators. The following sets forth the specific requirements that the controller must meet. 1. General -- The controller shall provide control of a single hydraulic actuator. It shall produce an output suitable for driving an electric servovalve mounted on a hydraulic actuator. The controller shall use PID control to produce the desired action by the hydraulic actuator based on an operator-selected feedback signal, either position or load. The controller shall incorporate a function generator for program signal generation and also accept external program signals. The controller shall be compatible with both 2-stage and 3-stage servovalves and have the capability of closing both the inner loop (for 3-stage valves) and the outer loop. 2. Servovalve Compatibility -- The controller as delivered shall be capable of controlling a 3-stage servovalve. The controller shall provide inner loop closure using feedback from the servovalve LVDT. The controller shall be compatible with our existing pilot stage servovalve which is a Moog model 760-232A servovalve. The electrical specifications of the servovalve are as follows: Single Coil Signal—40.00 mA (coils in parallel) 20.00 mA (coils in series) Permanent Wiring Configuration SINGLECOIL Coil Resistance -- 80.0 ohms nominal The power stage incorporates an LVDT for position sensing of the power spool and inner loop closure. The electrical characteristics of the LVDT are as follows: Input voltage -- 20 volts rms at 10-kHz Sensitivity -- 180mV/V/inch In addition to controlling 3-stage servovalves, the servocontroller shall also be capable of controlling 2-stage servovalves. The controller shall be compatible with the Moog 72-103 series servovalve. 3. Servocontroller Capabilities and Features -- The servocontroller shall incorporate the following features and capabilities. a. PID control of a single hydraulic actuator. The PID parameters shall be adjustable over a range to allow stable operation of a hydraulic actuator under a variety of test conditions. b. Electronics to drive the above referenced servovalves directly including signal conditioning for the 3-stage servovalve power stage LVDT. c. Electronics to condition signals from a minimum of two feedback transducers. This shall include conditioning for an LVDT to measure actuator position, and a full-bridge strain gage type load cell to measure actuator load. The operator shall have the option of selecting which feedback signal is to be used for control. d. A built-in function generator. The function generator shall provide program control and shall have sine, square, triangle and ramp waveforms and presetting of test cycle counts. The frequency range of the function generator shall be a minimum of 0.1-Hz to 50-Hz with a 0.1-Hz resolution minimum. The controller shall also have an input for accepting external program signals. e. Amplitude control compensation to assure that program end levels are achieved when sinusoidal programs are used. f. Front panel display of controller parameters including controller configuration, control parameters, function generation parameters, signal level of two feedback sensors, min/max of feedback signals, and valve drive signals. g. Front panel setup of test parameters including feedback selection, waveform, frequency, amplitude, cycle count, and PID parameters. Also program start, stop, and hold functions shall be accessed from the front panel. h. Hydraulic system control shall be incorporated in the front panel including low pressure, high pressure, off and emergency stop controls. Hydraulic control shall be compatible with 24 VDC control circuitry on the hydraulic power supply. i. BNC output connectors shall be provided for monitoring feedback transducer signals and the program input. j. PC communications interface to allow control of the servocontroller by a PC. Driver software shall be included to facilitate programming the controller in VisualBasic or LabVIEW. k. Mating connectors for all connectors shall be provided. l. Operation from 115 VAC, 60-Hz power. Posted 07/27/00 (W-SN479641). (0209)

Loren Data Corp. http://www.ld.com (SYN# 0320 20000731\66-0018.SOL)

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