1 GHI’s ESSM Environment Shock Simulation Machine A Powerful Concept - Produces Equivalent Hard Surface Shocks - For Evaluation of Miniaturized or Hand-Held Devices Copyright © 2005 GHI Systems, Inc. All Rights Reserved

2 © 2005 GHI Systems, Inc. Hard Surface Environmental Shock Physics Drops on hard surfaces produce the most severe environmental shocks. Have very high acceleration and frequency. Have very high acceleration and frequency. Results in very short stopping distances having high strain rate. Results in very short stopping distances having high strain rate. Cause product case and internal damage Cause product case and internal damage These dynamics can’t be accurately simulated by programmed shock or drop test machines. ESSM controls the variables of impact orientation, impact surface and dynamics. ESSM controls the variables of impact orientation, impact surface and dynamics.

3 © 2005 GHI Systems, Inc. Parameters Needed for Simulation Unrestrained non-tumbling free fall from threat height Impact surface to simulate environment Controlled impact and sensor orientation Drop velocity verification Captured shock waveform for analysis Shock Response Spectrum Shock Response Spectrum

4 © 2005 GHI Systems, Inc. ESSM Vs Drop Shock Machine Simulates Environment Shock Exact drop height Gauges impact velocity Simulates the impact surface Worst Case stopping distance Repeatable dynamics Easy for HS video to “see” the impact dynamics Small Lab space footprint Easily relocated Lower overall cost Impact limited by MEP Only equivalent drop height Impact velocity not controlled No impact surface - is fixtured Stopping distance is limited Dynamics limited by fixture Difficult for HS video Shows little of real environment shock Large relative footprint Hard to relocate Higher overall cost ESSM DROP SHOCK

5 © 2005 GHI Systems, Inc. Basic ESSM Elements Guide Rods UUT Grasper Pre-Impact Triggered Retracting Holders 72” Drop Height Scale & Velocimeter Sensor UUT Guide Stop Cushions & Release Triggers Surface Simulator Anvil ESSM Seismic Mass Detachable Impact Anvil Shock Sensor On UUT Drop height Setting and UUT release

6 © 2005 GHI Systems, Inc. Basic ESSM Base ”x16” Seismic mass lbs plus anvil Shafts SS 1.00” on 8” centers Bearings Recirculating Ball Impact Anvil Size...8” w x 6” d Anvil Material..... SS or Hard Wood Block Max Drop Ht ” Max Impact Vel “/sec Max UUT Wt lb Max UUT Size.... 6” Between Gripping faces* Min UUT Size.... 0” Overall Height ” Standard, other heights optional * UUT may be gripped in various orientations.

7 © 2005 GHI Systems, Inc. ESSM Operation Environment surface sample is installed on base anvil if required UUT is mounted on carriage in desired orientation Accelerometer is applied to UUT with main cable anchored to UUT carriage and linked with thin flexible non-encumbering cable UUT carriage is raised to desired height to match simulation UUT carriage is released resulting in free fall toward anvil Restrained UUT maintains orientation till impact UUT Grippers are triggered to release prior to impact, Adjustable UUT impacts anvil free of tumbling at desired orientation and velocity Shock data and pre-impact velocity are captured by GHI instrumentation to correlated with environment shock damage

8 © 2005 GHI Systems, Inc. Feature FAQs UUT Grippers (2) ” Dia. Circular* UUT Gripper Material Non conductive low density plastic density plastic Replaceable Grippers? Yes Replaceable Anvil? Yes* Instrumentation, Shock Analysis w/SRS optional w/SRS optional Impact Velocity VS Standard Price, Delivery Contact GHI * Other configurations Optional

9 © 2005 GHI Systems, Inc. Typical Design of Drop Release UUT carriage release is set to desired drop height and clamps tightened. UUT carriage is raised to desired height for drop and latched to UUT carriage release hook on electromagnetic solenoid. This allows seamless height setting for desired EUE simulation. Actual velocity is monitored by GHI velocimeter.

10 © 2005 GHI Systems, Inc. UUT Gripper Design Overview Quick-adjust Gripper Fingers Orientation Rotation Lock

11 © 2005 GHI Systems, Inc. Minimum 2” Gripper Release Height Simulated product is 5” wide x 2.5“ thick x 2.5” deep, shown in free fall at 2” above impact surface.

12 © 2005 GHI Systems, Inc. 2.5” Format Hard Disk Drive in Grippers Shown before release. Angle set to 15 o impact angle.

13 © 2005 GHI Systems, Inc. Grasping Flexibility 2.5 Inch format hard disk drive shown grasped in the Z axis for a precise X-Y plane corner impact shock.

14 © 2005 GHI Systems, Inc. Grasping Flexibility Cell phone held for random position shock - object can be released an inch or two above impact surface. Free fall can be set up to 72 inches above the impact surface. Impact surface can be changed to comply with particular test protocols or to simulate actual environmental threats. Pre-impact velocity will be measured as well as shock acceleration time history. SRS software for pyro type analysis is optional.

15 © 2005 GHI Systems, Inc. Strain Gauge Use Strain Gauges are compatible with the GHI Systems Data recording and analysis system. Film devices may require bridges and amplification, solid state devices are simpler. Dynamic strain induced failures may be measured.

16 © 2005 GHI Systems, Inc. Grasper Release Action Latch Bar Release Spring Latched Condition Released Condition

17 © 2005 GHI Systems, Inc. HS Video Frame - Corner

18 © 2005 GHI Systems, Inc. ESSM Summary ESSM simulates environmental drop height, impact velocity, and impact surface. Impact surfaces quickly replaceable for specific test protocols. Maintains Product Orientation to simulate actual events. Flexible UUT holding orientation options. High sample rate data system for impact velocity, uniaxial or triaxial shock acceleration and dynamic force – up to 1 MHz. Full Shock SRS S/W Module Optional. Small footprint 18 “ x 16 “, easily relocated. Sturdy machine base, 120 lbs, prevents machine rocking. Safe low voltage (12V DC) control, no compressed air needed. Open design makes high speed video easy.

19 © 2005 GHI Systems, Inc. Contact GHI Systems, Inc 916 N. Western Ave. Suite 201 San Pedro, CA Phone: Web Site: