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Case study: High-performance servo-motor controller board
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Case study: High-performance servo-motor controller board

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  • 1. High-performance servo-motor controller board Completed project - January 2007Customer"The Planet of Attractions" Ltd is engaged in designing and manufacturing modernhigh-technology amusement parks.ObjectiveThe objective is to develop, manufacture and test experimental models of gameplatform controller. The controller must perform the following functions: • Calculate spatial coordinates of platform location depending on game situation; • Calculate motor control actions taking into account the inertia and characteristics of the platform; • Store the settings and parameters of the platform in non-volatile memory; • Use one hardware platform as simulator for different attractions and games; • Interact with PC via digital interfaces; • Process data from location sensors of actuating mechanisms.The platform isdesigned for useas part of differentamusement complexes andit works as auto-, air-and othermotion simulators.SolutionFor the solution of the objective we suggest implementing controller on the basis ofAnalog Devices BlackFin BF532digital signal processor. The solution is oriented toprovide big computational power for executing control algorithms and calculation ofspatial coordinates.We applied NAND Flash Samsung K9K8G08U0M-PCB0 chip in the controller with theview to store big data array for various games and attractions, and built-in USBinterface allows uploading all settings into the controller as separate files, as intogeneral USB Mass Storage device. The developed protocol for communications of e-mail: info@promwad.com; www.promwad.com; phone: +375(17)312-1246 address: 22, Olshevskogo Street, 220073, Minsk, Republic of Belarus 1
  • 2. High-performance servo-motor controller boardthe device with personal computer provides the functions of in-circuit programming,interaction with game programs and functions of platform telemetry (automatictesting, control, operation modes, analysis of location and sensors state).The device can provide simultaneous control over 42 motors. It is possible becauseof six analog outputs for direct inverter control and six RS-485 digital interfacesbuilt into the card. Each RS-485 (UART) interface, in its turn, can control sixinverters. UART digital channels are implemented on CPLD microchip of MAXIIEPM570T100 family.The device also composes one analog channel for controlling over ButtKicker(ButtKicker is a dynamic speaker with extremely low frequency intended forvibration transmission to the seats). Communications protocol allows eitherreceiving sinusoidal signal of random frequency (1-150 Hz) and amplitude orplaying a definite track from sound gallery (clap, explosion, earthquake, engineroar etc.) at the output.In-circuit device programming can be realized via RS232 or USB2.0 interfaces. TheUSB Philips ISP1362 controller used in the chip allows operating in USB Host, USBDevice and USB OTG modes. e-mail: info@promwad.com; www.promwad.com; phone: +375(17)312-1246 © 2009 Promwad Innovation Company 2
  • 3. High-performance servo-motor controller boardWe implemented additional protection elements in connection with stringentrequirements in electromagnetic compatibility (EMC), determined by close positionof platform strength elements. EFT/ESD filters and optical relay were used inexternal communication interfaces to eliminate the noise influence from workingfrequency converters and powerful motors of alternating current. Analog circuitsand digital algorithms of filtration were applied to eliminate noise of analog inputsignals from location sensors of actuating mechanisms.Benefits and features • The use of high-performance BlackFin BF532 processor allows application of complex algorithms for platform control with big quantity of degrees of freedom; • The controller can provide independent control over 42 motors of alternating current; • The controller can be used both as a part of game simulator and in training simulators for drivers of different transport vehicles; • The device can be used as motor controller for different fields of human activities (for example, in systems of precise positioning of mechanisms).Development tools VisualDSP, P-CAD, Quartus, MVSTechnologies NAND Flash, RS232, RS485, USB2.0, DSPProgramming languages C, C++, ASMProject management tools dotProject, MSProject, CVSEfforts 65 man-daysDuration 3 months e-mail: info@promwad.com; www.promwad.com; phone: +375(17)312-1246 © 2009 Promwad Innovation Company 3